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Journal Papers
111. E.H. Khoo, A.Q. Liu, X.M. Zhang, E.P. Li, J. Li, D. Pinjala and B.S. Luk'yanchuk, "Exact step-coupling theory for mode-coupling behavior in geometrical variation photonic crystal waveguides," Physical Review B, Vol 80, 035101, 2009.
110. H. Cai, B. Liu, X. M. Zhang, A. Q. Liu, T. Bourouina and Q. X. Zhang, " A micromachined tunable coupled-cavity laser for wide tuning range and high spectral purity ,"Vol 16, No. 21, pp. 16670-16679, 2008.
109. L. K. Chin, A. Q. Liu, C. S. Lim, and Y.C Soh, " An On-chip Liquid Tunable Grating using Multiphase Droplet Microfluidics" Applied Physics Letters, Vol 93, 164107, 2008.
108. X. C. Li, J. Wu, A. Q. Liu, Z. G. Li, Y. C. Seow, H. J. Huang, K. Xu and J. T. Lin, "A liquid waveguide based evanescent wave sensor integrated onto a microfluidic chip ," Applied Physics Letters,Vol 93, 193901, 2008.
107. S. K. Chen, M. Y. Wang and A. Q. Liu, "Shape feature control in structural topology optimization ," Computer-Aided Design, Vol. 40, pp. 951-962, 2008.
106. Y. C. Seow, A. Q. Liu, L. K. Chin, X. C. Li, H. J. Huang, T. H. Cheng and X. Q. Zhou, "Different curvature of tunable liquid microlens via the control of laminar flow rate," Applied Physics Letters,Vol. 93, 084101, 2008.
105. W. M. Zhu, X. M. Zhang, A. Q. Liu, H. Cai, J. Tamil, And T. Buorouina, "A micromachined optical double well for thermo-optic switching via resonant tunneling effect,"Applied Physics Letters,Vol. 92, No.25, 251101, 2008.
104. Selin H. G. Teo, A. Q. Liu, J. B. Zhang, M. H. Hong, J. Singh, M. B. Yu, N. Singh and G. Q. Lo, "Photonic bandgap crystal resonator enhanced, laser controlled modulations of optical interconnects for photonic integrated circuits," Optics Express ,Vol. 16, pp. 7842-7848, 2008.
103. L . A. G Lin, Y. F. Yu, A. Q. Liu, C. S. Zhang, C. S. Lim, S. H. Ng, P. H. Yap and H. J. Gao, " Cell Compressibility Studies Utilizing Non-Contact Hydrostatic Pressure Measurements on Single Living Cells in a Microchamber ," Applied Physics Letters, Vol. 92, No. 233901, 2008.
102. A. Q. Liu, H. J. Huang, L. K. Chin, Y. F. YU, and X. C. Li (Invited paper), "A Review - Label-Free Detection with Micro-Optical-Fluidic-System (MOFS)," Journal of Analytical and Bioanalytical Chemistry, Vol. 391, No. 7,pp 2443-2452, 2008.
101. M. Tang , A. Q. Liu, and J.Oberhammer, "A silicon-on-Glass Single-Pole Double-Throw (SPDT) Switching Circuit Integrated With Silicon-Core Metal-Coated Transmission Line," Journal of Micromechanics and Microengineering, Vol 18, No. 095024, 2008.
100. H. Cai, A. Q. Liu, X. M. Zhang , J. Tamil, D. Y. Tang , J. Wu and Q. X. Zhang, "Tunable dual-wavelength laser constructed by silicon micromachining," Applied Physics Letters, Vol. 92, No.05, 051113, 2008.
99. H. Cai, A. Q. Liu, X. M. Zhang , J. Tamil, Q. X. Zhang, D. Y. Tang, C. Lu, "A Miniature Tunable Coupled-Cavity Laser Constructed by Micromachining Technology," Applied Physics Letters, Vol. 92, No.03, 031105, 2008.
98. X. M. Zhang, Q. W. Zhao, A. Q. Liu, J. Zhang, J. H. Lau and C. H. Kam, "Asymmetric tuning schemes of MEMS dual-shutter VOA," Journal of Lightwave Technology, Vol. 26, no. 5, pp. 569-579,2008.
97. A. Q. Liu, E. H. Khoo, T. H. Cheng, J. Li and D. Pinjala, "A frequent-selective circulator via mode coupling between surface waveguide and resonators," Applied Physics Letters, Vol. 92, No.02, 021119, 2008.
96.J. Oberhammer, A. Q. Liu, and G. Stemme, "Time-efficient quasi-static algorithm for simulation of complex single-sided clamped electrostatic actuators," IEEE Journal of Microelectromechanical Systems, Vol. 16, no. 2, pp. 373-382, 2007.
95. J. H. Wu, A. Q. Liu, and H. L. Chen, "Exact solutions for free-vibration analysis of rectangular plates using Bessel functions," IEEE/ASME Journal of Applied Mechenics-Transactions , Vol. 74, no. 6, pp. 1247-1251, 2007.
94. L. K. Chin, A. Q. Liu, X. M. Zhang, C. S. Lim, J. H. Ng, J. Z. Hao and S. Takahashi, "Differential single living cell refractometry using grating resonant cavity with optical trap," Applied Physics Letters, Vol. 91, No.2 4 , 2 43901 , 2007.
93. W. M. Zhu, X. M. Zhang, T. Zhong, A. Q. Liu and M. Yu, "Micromachined optical well structure for thermo-optic switching," Applied Physics Letters, Vol. 91, No.26,261106, 2007.
92. A. Q. Liu, A. B. Yu, M. F. Karim and M. Tang (invited review paper), "RF MEMS switches and integrated switching circuit," Journal of Semiconductor Technology and Science, Special issue on NANO/Microsystems Technology, Vol. 7, No.3, September, 2007.
91. E. H. Khoo, A. Q. Liu, T. H. Cheng, J. Li and D. Pinjala, "Light focusing via Rowland concave surface of photonic crystal", Applied Physics Letters, Vol. 91, No.22, 221105, 2007.
90. Z. G. Wu, A. Q. Liu, and Klas Hjort, "Microfluidic continuous particle-cell separation via electroosmotic-flow-tuned hydrodynamic spreading," Journal of Micromechanics and Microengineering , Vol. 17 pp. 1992-1999 2007.
89. E. H. Khoo, T. H. Cheng, A. Q. Liu and J. Li and D. Pinjala, "Transmitting light efficiently on photonic crystal surface waveguide bend", Applied Physics Letters, Vol. 91, No.17, 171109, 2007.
88. W. Z. Song, A. Q. Liu, S. Swaminathan, C. S. Lim, P. H. Yap, and T. C. Ayi, "Determination of single living cell’s drywater mass using optofluidic chip", Applied Physics Letters, Vol. 91, No.22, 223902, 2007.
87. Selin H. G. Teo, A. Q. Liu, J. Singh, M. B. Yu and G.Q. Lo, "Rod type photonic crystal optical line defect waveguides with optical modulations," A pplied Physics A-Material Science&Processing, Vol. 89, pp. 417-422, 2007.
86. A. B. Yu, A. Q. Liu, J. Oberhammer, Q. X. Zhang and H. M. Hosseini, "Characterization and optimization of dry releasing for the fabrication of RF MEMS capacitive switches," Journal of Micromechanics and Microengineering , Vol. 17 pp. 2024-2030 2007.
85. X. C. Li, A. Q. Liu, J. Wu, K. Xu and J.T. Lin, "A side-coupled photonic crystal filter with sidelobe suppression," A pplied Physics A-Material Science&Processing, Vol. 89, pp. 327-332, 2007.
84. M. Tang, A. Q. Liu, A. Argawal and M. H. Habib, "A single-mask substrate transfer technique for the fabrication of high aspect ratio micromachined structure," Journal of Micromechanics and Microengineering , Vol. 17, pp. 1575-1582, 2007.
83. M. F. Karim, A. Q. Liu, A. Alphones and A. B. Yu, "A reconfigurable micromachined switching filter using periodic structures," IEEE Transaction on Microwave Theory and Technique, Vol. 55 , No 6, pp. 1154-1162, 2007.
82. X. M. Zhang, A. Q. Liu, C. Lu and D. Y. Tang, "A real pivot structure for MEMS tunable lasers," IEEE Journal of Microelectromechanical Systems, Vol. 16, no. 2, pp. 269-278, 2007.
81. J. H. Wu, A. Q. Liu, L. K. Ang, T. H. Cheng, K. Xu, J. Wu, and J. T. Lin , "Complex photonic band diagrams for finite-size photonic crystals with arbitrary defects," Journal Of Applied Physics Vol. 101, 053101, 2007.
80. A. Q. Liu, X. M. Zhang, H. Cai, A. B. Yu and C. Lu, "Retro-axial VOA using parabolic mirror pair", IEEE Photonics Technology Letters, Vol. 19, no. 9, pp. 692-694, 2007.
79. T. Zhong, X. M. Zhang, A. Q. Liu, J. Li, C. Lu, And D. Y. Tang, "Thermal-optic switch by total-internal reflection of micromachined silicon prism," IEEE Journal of Selected Topics in Quantum Electronics, Vol. 12, no. 2, pp. 348-258, 2007.
78. M. F. Karim, A. Q. Liu, A. B. Yu and A. Alphones, "Micromachined tunable filter using fractal electromagnetic bandgap (EBG) structures," Sensors and Actuators A 133, pp. 355-362,2007.
77. Y. Sun, C. S. Lim, A. Q. Liu, T.C. Ayi, P. H. Yap , "Design, simulation and experiment of electroosmotic microfluidic chip for cell sorting," Sensors and Actuators A Vol. 133, pp. 340-348, 2007.
76. Selin H. G. Teo , A. Q. Liu, J. Singh , M. B. Yu , "Hole-type 2-dimensional photonic crystal fabricated in silicon on insulator wafers," Sensors and Actuators A Vol. 133, pp. 388-394, 2007.
75. X. J. Liang, A. Q. Liu, C. S. Lim, T. C. Ayi, P. H. Yap, "Determining refractive index of single living cell using integrated microchip," Sensors and Actuators A Vol. 133, pp. 349-354, 2007.
74. A. Q. Liu, X. M. Zhang, "A review of MEMS external-cavity tunable lasers," Journal of Micromechanics and Microengineering, Vol.17, pp. R1-R13, 2007.
73. J. H. Wu, T. H. Cheng, A. Q. Liu,and Y. X. W ang, " Modulational Transparency and Femtosecond Pulse Train in Bragg Reflectors with Time-Varying Dielectric Constant," Applied Physics Letters Vol. 89, No.26, 263103, 2006.
72. W. Z. Song, X. M. Zhang, A. Q. Liu, C. S. Lim, P. H. Yap and Habib Mir M.Hosseini," Refractive index measurement of single living cells using on-chip Fabry-Pérot cavity," Applied Physics Letters, Vol. 89, no. 20, 203901, 2006.
71. J. Oberhammer, M. Tang, A. Q. Liu and G. Stemme, "Mechanically tri-stable, true single-pole-double-throw(SPDT) switches," Journal of Micromechanics and Microengineering, Vol. 16, pp. 1-8,2006.
70. A . Q. Liu , J. Li, Z. S. Liu, and C. Lu, "Self-latched micromachined mechanism with large displacement ratio," Journal of Microelectromechanical Systems, Vol 15, no. 6, 2006.
69. J. H. Wu, A. Q. Liu, and L. K. Ang," Bandgap optimization of finite photonic structures using apodization method,"Journal of Applied Physics, Vol. 100, 084309, 2006.
68. Selin H. G. Teo, A. Q. Liu, M. B. Yu, and J. Singh, " Synthesized processing techniques for monolithic iIntegration of nanometers-scale hole type photonic bandgap crystal with micrometers-scale microelectromechanical structures ," Journal of Vacuum Science & Technology B, Vol. 24, no. 4, pp. 1689-1701, 2006.
67. Selin H. G. Teo, A. Q. Liu, J. B. Zhang, and M. H. Hong, "Induced free carriers modulation of photonic crystal optical intersection via localized optical absorption effect," Applied Physics Letters, Vol. 89, 091910, 2006.
66. E. H. Khoo, A. Q. Liu, J. H. Wu, J. Li and D. Pinjala, "Modified step-theory for investigating mode coupling mechanism in photonic crystal waveguide taper," Optics Express, Vol. 14, no. 13, 2006.
65. A. B. Yu, A. Q. Liu and Q. X. Zhang and H. M. Hosseini, "Effects of surface roughness on electromagnetic characteristics of capacitive switches," Journal of Micromechanics and Microengineering, Vol. 16, pp. 2157-2166, 2006.
64. B. Borovic , A. Q. Liu, D. Popa, H. Cai and F. L. Lewis, "Light-Intensity-Feedback-Waveform Generator Based on MEMS Variable Optical Attenuator," IEEE Transactions on Industrial Electronics, Vol. 55, no.1, pp.417-426, Jan.2008.
63. J. H. Wu, A. Q. Liu, and H. H. Li, "Investigation of resonant modes in thin microcavities using electromagnetic theory," Optics Letters, Vol. 31, pp. 2438-2440, 2006.
62. J. Li, A. Q. Liu, X. M. Zhang and T. Zhong, "Light switching via thermo-optic effect of micromachined silicon prism," Applied Physics Letter , Vol. 88, no. 24, paper no. 243501, 12 June 2006.
61. B. Borovic , F. L. Lewis, A. Q. Liu, E. S. Kolesar, and D. Popa, "Lateral instability problem in electrostatic comb-drive actuators: modeling and feedback control," Journal of Micromechanics and Microengineering, Vol. 16, no. 7, pp. 1233-1241, 2006
60. J.-M. Huang, A. Q. Liu, Z. L. Deng, Q. X. Zhang, "A modeling and analysis of spring-shaped torsion micromirrors for low-boltage applications," International Journal of Mechanical Sciences, Vol. 48, pp. 650-661, 2006.
59. L. M. Zhao, D. Y. Tang and A. Q. Liu, "Chaotic dynamics of a passivelymode-locked solution fiber ring laser," Chaos, Vol. 16, no. 1, paper no. 13128-9, 2006.
58. S. P. Ng, D. Y. Tang, A. Q. Liu, L. J. Qin, X. L. Meng, "Short pulse passively Q-switched Nd:GdYVO4 laser using a GaAs mirror," Optics Communications , Vol. 259, no. 1, pp. 256-260, 2006.
57. Q. X. Zhang, A. B. Yu, L. H. Guo, R. Kumar, K. W. Teoh, A. Q. Liu, G. Q. Lo, and D. –L. Kwong, "RF MEMS switch integrated on printed circuit board with metallic membrane first sequence and transferring," IEEE Electron Device Letters, Vol. 27, no. 7, pp. 552-554, 2006.
56. Selin H. G. Teo, A. Q. Liu, M. B. Yu , and J. Singh, "Fabrication & demonstration of square lattice two-dimensional rod-type photonic bandgap crystal optical intersections," Photonics and Nanostructures - Fundamentals and Applications, Vol. 4, no. 2, pp. 103-115, 2006.
55. J. H. Wu and A. Q. Liu, "Exact solution of resonant modes in a rectangular resonator," Optics Letters, Vol. 31, no. 11, pp. 1720-1722, 2006.
54. J. H. Wu, A. Q. Liu, H L Chen, T N Chen, "Multiple scattering of a spherical acoustic wave from fluid spheres," Journal of Sound and Vibration, Vol. 290, no. 1, pp. 17-33, 2006.
53. J. Li, A. Q. Liu and Q. X. Zhang, "Tolerance analysis for comb-drive actuator using DRIE fabrication," Sensors and Actuators A Physical, Vol. 125, no. 2, pp. 494-503, 2006.
52. M. F. Karim, A. Q. Liu, A. Alphones and A. B. Yu, "A tunable bandstop filter via the capacitance change of micromachined switches," Journal of Micromechanics and Microengineering, Vol. 16, no. 4, pp. 851-861, 2006.
51. A. B. Yu, A. Q. Liu, Q. X. Zhang; A. Alphones; H.M. Hosseini, "Micromachined DC contact capacitive swith on low-resistivity silicon substrate," Sensors & Actuators Physics A, Vol. 127, no. 1, pp. 24-30, 2006
50. E. Khoo, A. Liu, J. Wu, "Nonuniform photonic crystal taper for high - efficiency mode coupling," Optics Express, Vol. 13, no. 20, pp. 7748 - 7759, 2005.
49. A. Q. Liu , M. Tang, A. Agarwal, and A. Alphones, "Low-loss lateral micromachined switches with frequencies from DC to 25 GHz," Journal of Micromechanics and Microengineering, Vol. 15, pp. 157-167, 2005.
48. M. Tang , A. Q. Liu, and A. Agarwal, Z. S. Liu, and C. Lu, "A single-pole double-throw circuit using lateral metal-contact micromachined switches," Sensors & Actuators, Physics A, Vol. 121, pp. 187-196, 2005.
47. M. Tang , A. Q. Liu, A. Agarwal, and Q. X. Zhang, "High Isolation X-Band MEMS capacitive microswitches," Sensors & Actuators, Physics A, Vol. 120, pp. 241-248, 2005.
46. A. Q. Liu , W. Palei, M. Tang and A. Alphones, "Microstrip lateral RF MEMS switch integrated with multi-step CPW transition," Microwave and Optical Technology Letters, Vol. 44, no. 1, pp. 93-95, 2005.
45. W. Palei, A. Q. Liu, A. B. Yu, A. Alphones and Y.H. Lee, "Optimization of design and fabrication for micromachined true time delay (TTD) phase shifters," Sensors & Actuators, Physics A, Vol. 119, pp. 446-454, 2005.
44. A. B. Yu, A. Q. Liu, Q. X. Zhang, A. Alphones, L. Zhu and S. A. Peter, "Improvement of isolation for RF MEMS capacitive shunt switch via membrane planarization," Sensors & Actuators, Physics A, Vol. 119, pp. 206-213, 2005.
43. A. B. Yu, A. Q. Liu , Q. X. Zhang, "Tunable MEMS LC tesonator with large tuning range," Electronics Letter, Vol. 41, no. 15, pp. 855-857, 2005.
42. H. Cai, X. M. Zhang, C. Lu, A. Q. Liu and E. H. Khoo, "Linear MEMS variable optical attentuator using reflective elliptical mirror," IEEE Photonics Technology Letters, Vol. 17, no. 2, pp. 402-404, 2005.
41. X. M. Zhang, A. Q. Liu, C. Lu, and D. Y. Tang, "Continuous wavelength tuning in micromachined Littrow external-cavity lasers," IEEE Journal of Quantum Electronics, Vol. 41, no. 2, pp. 187-197, 2005.
40. A . Q. Liu , X. M. Zhang, C. Hong, D. Y. Tang and C. Lu, "Miniaturized injection-locked laser using microelectromechanical systems technology," Applied Physics Letters, Vol. 87, 101101, 2005.
39. M. F. Karim, A. Q. Liu, A. Alphones and X. J. Zhang, "Low-pass filter using a hybrid EBG structure," Microwave and Optical Technology Letters, Vol. 45, no. 2, pp. 95-98, 2005.
38. Q. X. Zhang, J. Li, A. Q. Liu, W. D. Zhong, "Fabrication technique for MEMS vertical comb-drive actuators on a monolithic silicon substrate," Journal of Vacuum Science & Technology B, Vol. 23, no.1, pp. 32, 2005.
37. J. Li, X. M. Zhang, A. Q. Liu, C. Lu and J. Z. Hao, "A monolithically integrated photonic MEMS subsystem for optical network applications," Optics Communications, Vol. 249, no. 4-6, pp. 579-586, 2005.
36. J H Wu, L K Ang, A Q Liu, H G Teo, and C Lu, "Tunable high Q photonic bandgap Fabry-Perot resonator," Journal of Optical Society of America B, Vol. 22, no. 8, pp. 1770-1777, 2005.
35. D. Y. Tang, L. M. Zhao, B. Zhao and A. Q. Liu, "Mechanism of multisoliton formation and soliton energy quantization in passively mode-locked fiber lasers," Physical Review A, Vol. 72, paper no. 043816, 2005.
34. B. Borovic, A. Q. Liu, D. Popa, H. Cai and F. L. Lewis , "Open-loop versus closed-loop control of MEM devices: choices and issues,” Journal of Micromechanics and Microengineering," Vol. 15, pp. 1917-1924, 2005.
33. H. G. Teo, A. Q. Liu, G. L. Sia, C. Lu, J. Singh, M. B. Yu, and H. Q. Sun, "Deep UV lithography for pillar type nanophotonic crystal," International Journal of Nanoscience, Vol. 4, pp. 559-556, 2005.
32. H. G. Teo, A. Q. Liu, G. L. Sia, C. Lu, J. Singh, and M. B. Yu, "Deep reactive ion etching for pillar type nanophotonic crystal," International Journal of Nanoscience, Vol. 4, pp. 567-574, 2005.
31. M. F. Karim, A. Q. Liu, A. B. Yu, A. Alphones, and X. J. Zhang, "CPW band-stop filter using unloaded and loaded EBG structures," IEE Proceedings on Microwave and Antenna Propagation, Vol. 152, no. 6, pp. 434-440, 2005.
30. X. M. Zhang, A. Q. Liu, D. Y. Tang, and C. Lu, "Discrete wavelength tunable laser using microelectromechanical systems technology," Applied Physics Letters, Vol. 84, no. 3, pp. 329-331, 2004.
29. A. Q. Liu , X. M. Zhang, D. Y. Tang and C. Lu, "Tunable laser using micromachined grating with continuous wavelength tuning," Applied Physics Letters, Vol. 85, no. 17, pp. 3684-3686, 2004.
28. J. Li, A. Q. Liu, W. D. Zhong, Q. X. Zhang, C. Lu, "MEMS switch based serial reconfigurable OADM," Optics Communications, Vol. 230, no. 1-3, pp. 81-89, 2004.
27. H. G. Teo, A. Q. Liu, J. Singh, M. B. Yu and T. Bourouina, "Design and simulation of MEMS optical switch using photonic bandgap crystal," Microsystem Technologies, Vol 9, pp. 542-549, 2004.
26. H. G. Teo, A. Q. Liu, J. Singh and M. B. Yu, "High resolution and aspect ratio 2D cubic lattice nano-rods photonic vandgap crystal," Journal of Vacuum Science & Technology B, Vol. 22, pp. 2640, 2004.
25. W. Palei, A. Q. Liu, A. B. Yu and Y.H. Lee, "Optimization of design and fabrication for micromachined true time delay (TTD) phase shifters," Sensors & Actuators, Physics A, Vol. 119, no. 2, pp. 446-454, 2005.
24. W. Palei, A. Q. Liu, M. Tang, and A. Alphones, "Single-pole-four- throw switch using high-aspect ratio lateral switches," IEE Electronics Letters, Vol. 40, no. 18, pp. 1125-1126, 2004.
23. M. Tang , A. Q. Liu, A. Agarwal, and Q. X. Zhang, "A new approach of lateral RF MEMS switch," Analog Integrated Circuits and Signal Processing, Vol. 40, pp. 165-173, 2004.
22. F. Chollet, G. M. Hegde, X. M. Zhang, A. Q. Liu and A. Asundi, "Vibration measurement with a micromachined mirror in a very-short external cavity laser," Sensors & Actuators, Physics A, 116, no. 2, pp. 232-240, 2004.
21. J. M. Huang, A. Q. Liu, Z. L. Deng, Q. X. Zhang, Q. X. Zhang, J. Ahn and A. Asundi, "An approach to the coupling effect between torsion and bending for electrostatic torsional micromirrors," Sensors & Actuators, Physics A, Vol. 115, no.1, pp. 159-167, 2004.
20. A. Q. Liu , X. M. Zhang, C. Lu, F. Wang,, Z. S. Liu, C. Lu, "Optical and mechanical models for a variable optical attenuator using a micromirror drawbridge," Journal of Micromechanical and Microengineering, Vol. 13, no. 3, pp. 400-411, 2003.
19. A. Q. Liu , X. M. Zhang, J. Li, "Single-/multi-mode runable lasers using MEMS mirror and grating," Sensors & Actuators, Physics A, Vol. 108, pp. 49-54, 2003.
18. J. Li, Q. X. Zhang, A. Q. Liu, J. Ahn, W. L. Goh , "A new rechnique to prevent stiction and notching effect on silicon-on-insulator (SOI) microstructure," Journal of Vacuum Science & Technology B, Vol. 21, no. 6, pp. 2530-2539, 2003.
17. J. -M. Huang, A. Q. Liu, J. Ahn, "Mechanical characterization of micromachined capacitive switches: design consideration and experimental verification," Sensors & Actuators, Physics A., Vol. 108, pp. 36-48, 2003.
16. X. J. Zhang, A. Alphones, A. Q. Liu, Y.C. Leong, C. H. Liang, T. H. Chio, "A simplified hybrid calculation method for the surface fields and near fields of surface-current patches," Microwave and Optical Technology Letters, Vol. 36, no. 6, pp. 471-474, 2003.
15. X. M. Zhang, A. Q. Liu, C. Lu, F. Wang, Z. S. Liu, "Polysilicon micromachined fiber-optical attenuator for DWDM applications," Sensors & Actuators, Physics A, Vol. 108, pp. 28–35,2003.
14. X. M. Zhang, A. Q. Liu, C. Lu, "New near-field and far-field attenuation models for free-space variable optical attenuators (VOAs)," IEEE The Journal of Lightwave Technology, Vol. 21, no. 12, pp. 3417-3426, 2003.
13. J. Li, Q. X. Zhang and A. Q. Liu, "Advanced fibre optical switches using deep RIE (DRIE) fabrication," Sensors & Actuators, Physics A, Vol. 102, pp. 286-295, 2003.
12. X. M. Zhang, A. Q. Liu, C. Lu, D. Y. Tang, "MEMS variable optical attenuator using low driving voltage for DWDM systems ," IEE Electronics Letters, Vol. 38, no. 8, 2002, pp. 382-383.
11. A. Q. Liu , X. M. Zhang, V. M. Murukeshan, C. Lu and T. H. Cheng, "Micromachined wavelength tunable laser with an extended feedback model," IEEE Journal of Selected Topics on Quantum Electronics , Vol. 8, no. 1, pp. 73-79, 2002.
10. X. M. Zhang, A. Q. Liu, V. M. Murukeshan, and F. A. Chollet, "Integrated micromachined tunable lasers for all-optical network applications," Sensors & Actuators, Physics A, Vol. 97-98 pp. 54-60, 2002.
9. A. Q. Liu , X. M. Zhang, V. M. Murukeshan, Q. X. Zhang, Q. B. Zou, and S. Uppili, "An optical switch using drawbridge micromirror for large array crossconnects," Sensors & Actuators, Physics A, Vol. 97-98, pp. 227-238, 2002.
8. C. Quan, S. H. Wang, C. J. Tay, A. Q. Liu, and H. M. Shang, "Deformation measurement of a micro-RF capacitive switch membrane using laser interferometry," Optical Engineering, Vol. 42, no. 1, pp.92-97, 2003.
7. F. Wang, C. Lu, Z. S. Liu, J. Li, A. Q. Liu, and X. M. Zhang, "Finite element simulation and theoretical analysis of fiber-optical switches," Sensors & Actuators, Physics A, Vol. 96, pp. 167-178, 2002.
6. B. Zhao, A. Q. Liu, F. Chollet, J. M. Miao, H. M. Xie, and A. Asundi, "Desiging and modelling of a grating-based displacement micro-transducer," Nanotechnology, Vol. 12, pp. 308-315, 2002.
5. A. Q. Liu , X. M. Zhang, and V. M. Murukeshan, "A novel device level micromachined tunable laser using polysilicon 3D mirror," IEEE Photonics Technology Letters, Vol. 13, no. 5, pp. 427-429, 2001.
4. X. M. Zhang, F. S. Chau, C. Quan, and A. Q. Liu, "A study of the static characteristics of a torsional micromirror," Sensors & Actuators, Physics A, Vol. 1-2, pp. 73-81, 2001.
3. Y. J. Ha, M. F. Li, and A. Q. LIU, "A New CMOS buffer amplifier design used in low voltage MEMS interface circuits," IEEE Journal of Analog Integrated Circuit and Signal Processing, Vol. 27, pp 7-17, 2001.
2. J- H. Huang, K. M. Liew, C. H. Wong, S. Rajendran, M. J. Tan and A. Q. LIU, "Mechanical design and optimization of capacitive micromachined switch," Sensors and Actuators, Physics A, Vol. 93, no. 3, pp. 273-285, 2001.
1. A. Q. Liu , B. Bao, F. Chollet, Q. Zou, A. Asundi, and H. Fujita, "Micro-opto-mechanical grating switches," Sensors & Actuators, Physics A, Vol. 86, pp.127-134, 2000.
Conference Papers
10. X. M. Zhang, W. M. Zhu, H. Cai, and A. Q. Liu,"Active switching of surface plasmon polariton using MEMS actuators," 21th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2008), Tucson, Arizona, USA, pp. 778-781.
9. W. M. Zhu, X. M. Zhang, T. Zhong and A. Q. Liu, "MEMS Optical Tunneling Structure for Thermo-optic Switching," 21th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2008), Tucson, Arizona, USA, pp. 782-785.
8. H. Cai, X. M. Zhang, J. Tamil, Q. X. Zhang and A. Q. Liu, "Nanosecond-level wavelength tuning using MEMS coupled-cavity laser," 21th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2008), Tucson, Arizona, USA, pp. 786-789.
7. X. M. Zhang, A. Q. Liu, H. Cai and A.B. Yu,"Retro-reflection VOA using parabolic mirror for low insertion loss and linear attenuation relationship" , The 20th IEEE International Conference on MEMS (MEMS 2007), 21-25 January 2007, Kobe, Japan,pp. 727-730, paper TA37.
6. A. B. Yu, X. M. Zhang, Q. X. Zhang and A. Q. Liu, "Rhombic-shaped thermal actuator array for evenly-distributed very large displacement", The 20th IEEE International Conference on MEMS (MEMS 2007), 21-25 January 2007, Kobe, Japan,pp. 663-666,paper TA32>.
5. H. Cai, X. M. Zhang, A. B. Yu, Q. X. Zhang and A. Q. Liu, "MEMS tuning mechanism for eliminating mode hopping problem in external-cavity lasers", The 20th IEEE International Conference on MEMS (MEMS 2007), 21-25 January 2007, Kobe, Japan,pp. 159-162.
4. Selin H. G. Teo, J. B. Zhang, L. P. Shi, M. H. Hong and A. Q. Liu, "Light speed optical with control with Nano-Opto electronic device light speed" , The 20th IEEE International Conference on MEMS (MEMS 2007), 21-25 January 2007, Kobe, Japan,pp. 751-754, paper W34>.
3. X. M. Zhang, H. Cai, C. Lu, C. K. Chen and A. Q. Liu, "Design and experiment of 3-dimensional micro-optical system for MEMS tunable lasers," 19th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2006), 22-26 January 2006, Istanbul, Turkey, pp. 830-833, paper MP45.
2. X. M. Zhang, J. B. Zhang, A. Q. Liu, Franck Chollet and J. Z. Hao, "Study of injection-locking phenomenon using MEMS tunable laser," 18th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2005), 30 January – 3 February 2005, Miami Beach, Florida, USA, paper MP7, pp. 80-83.
1. H. Cai, X. M. Zhang, C. Lu and A. Q. Liu, "Wide-range linear attenuation via elliptical mirror for variable attenuator application," 18th IEEE International Conference on Micro Electro Mechanical Systems (MEMS 2005), 30 January – 3 February 2005, Miami Beach, Florida, USA, paper MP8, pp. 84-87.
25. A. Q. Liu and X. M. Zhang, “Photonic MEMS-from laser physics to cell biology,” The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07), 10-14 June 2007, Lyon, France, pp. 2485-2488, paper 4B2.1(invited talk).
24. M. Tang, A. Q. Liu, and A. Agarwal, "A low-loss single-pole double-throw (SPDT) switch circuit," The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07),10-14 June 2007,Lyon, France (accepted).
23. E.H.Khoo, J.Li, H. Cai, D. Pinjala and A. Q. Liu, "An integrated MEMS switch system with fast switching speed and low power demand ," The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07),10-14 June 2007,Lyon, France (accepted).
22. L. K. Chin, A. Q. Liu, C. S. Lim, P. H. Yap, J. H. Ng, J. Z. Hao and S. Takahashi, "Single living cell refractometry using FBG-based resonant cavity," The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07),10-14 June 2007,Lyon, France (accepted).
21. H. Cai, X. M. Zhang, J. Wu, D. Y. Tang, Q.X. Zhang, and A. Q. Liu, " MEMS tunable dual-wavelength laser with large tuning range," The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07),10-14 June 2007 Lyon, France, pp. 1433-1436, paper 3B2.1.
20. H. Cai, X. M. Zhang, J. Wu, D. Y. Tang, Q.X. Zhang, and A. Q. Liu, "MEMS tunable coupled-cavity laser," The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07),10-14 June 2007, Lyon, France, pp. 1441-1444, paper 3B2.3.
19. W. Z. Song, C. S. Lim, A. Q. Liu and P. H. Yap, “Differential Mach Zehnder interferometer for simultaneously determining size and refractive index of living cells”. The 14th International Conference on Solid-state Sensors, Actuators and Microsystems (Transducer '07),10-14 June 2007, Lyon, France (accepted)
18. X. M. Zhang, A. Q. Liu, A. B. Yu, H. Cai, D. Y. Tang, and C. Lu, "Real pivot mechanism of rotary comb-drive actuators for MEMS continuously tunable lasers," The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07),10-14 June 2007,Lyon, France, pp. 1437-1440, paper 3B2.2.
17. X. M. Zhang, Q. W. Zhao, A. Q. Liu, T. Zhong, A. B. Yu, E. H. Khoo, C. Lu, and D. Y. Tang, "Variable nano-grating for wavelength-independent tunable devices," The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07),10-14 June 2007, Lyon, France, pp. 2417-2420, paper 4B1.4.
16.T. Zhong, X. M. Zhang, J. Li and A. Q. Liu. “Air Spaced Cylindrical Prisms For Fast Thermal Optical Switching,” The 14th International Conference on Solid-State Sensors, Actuators and Microsystems (Transducers ’07),10-14 June 2007,Lyon, France, pp. 2409-2412, paper 4B1.2.
15. X. M. Zhang, A. Q. Liu, H. Cai, C. Lu and D. Y. Tang, "MEMS injection-locked laser," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 1, pp. 388-391.
14. J . Li, Z. S. Liu, C. Lu, Q. X. Zhang, and A. Q. Liu , "A self-limited large-displacement-ratio micromechanical amplifier,"Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 1, pp. 725-728.
13. X. M. Zhang, H. Cai, A. Q. Liu, J. Z. Hao, D. Y. Tang, and C. Lu, "MEMS littman tunable laser using curve-shaped blazed grating," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 1, pp. 804-807.
12. Selin H. G. Teo, A. Q. Liu , J. Singh, M. B. Yu, J. H. Wu, and X. M. Zhang, "Pure photonic crystal waveguiding for signal processing at optical junctions," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 1, pp. 1039-1042.
11. Q. X. Zhang, A. B. Yu and A. Q. Liu , "Metal contact capacitive switch on low-resistivity silicon wafer," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 1, pp. 1055-1058.
10. H. Cai, X. M. Zhang, C. Lu, and A. Q. Liu , "MEMS variable optical attenuator with linear attenuation using normal fibers," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 2, pp. 1171-1174.
9. J. Li, X. M. Zhang, A. Q. Liu , and M. Tang, "Pico-second optical switch using Micromachined Total Internal Reflection Prism," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 2, pp. 1179-1182.
8. Y. Sun, A. Q. Liu , P. H. Yap, and T. C. Ayi, "A Self-Contained Microfluidic Cell Sorting system for HIV diagnosis," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 2, pp. 1708-1711.
7. X. J. Liang, A. Q. Liu , X. M. Zhang, P. H. Yap, T. C. Ayi, and H. S. Yoon, "Determination of refractive index for single living cell using integrated biochip," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 2, pp. 1712-1715.
6. A. B. Yu, A. Q. Liu , and Q. X. Zhang, "Wide tuning range MEMS band-pass filter with inductance change," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 2, pp. 2061-2064.
5. J. Oberhammer, A. Q. Liu , and G. Stemme, "Numerical algorithm for quasi-static nonlinear simulation of touch-mode actuators with complex geometries and pre-stressed materials," Transducers '05, 5-9 June, 2005, Seoul, Korea, Volume 2, pp. 2119-2122.
4.X. M. Zhang, A. Q. Liu, D. Y. Tang, C. Lu, A. Asundi, J. Z. Hao, "Tunable external-cavity laser using MEMS technology," Transducers '03, 7-12 June, 2003, Boston, USA, pp. 1502-1505.
3. X. M. Zhang, A. Q. Liu, C. W. Chan, C. S. Thian, J. Z. Hao, H. Cai, "Optical power regulator using llosed-controlled MEMS variable optical attenuator (VOA)," Transducers '03, 7-12 June, 2003, Boston, USA, pp. 595-598.
2. X. M. Zhang, A. Q. Liu, V. M. Murukeshan, and F. A. Chollet, "Integrated micromachined tunable lasers for all-optical network applications," Transducers '2001, 10-14 June 2001, Munich, Germany.
1. A. Q. Liu, X. M. Zhang, Q. X. Zhang, Q. B. Zou, and S. Uppili, "Optical switch using drawbridge micromirror for large array crossconnects," Transducers '2001, 10-14 June 2001, Munich, Germany.
20. L. K. Chin, Y. C. Seow, C. S. Lim and A. Q. Liu, “A tunable fluidic microlens with fluorescence enhancement,” μTAS2008(12th International Conference on Miniaturized Systems for Chemistry and Life Sciences),San Diego, California, USA.
19. L. K. Chin, C. S. Lim and A. Q. Liu, “Design and characterisation of multiphase LPG interferometer using droplet microfluidics,” μTAS2008(12th International Conference on Miniaturized Systems for Chemistry and Life Sciences),San Diego, California, USA.
18. J. J. Gu, Y. F. Yu, E. P. Li, S. H. Ng, P. H. Yap, X. Q. Zhou, T. H. Cheng and A. Q. Liu, “Real-time measurement of cellular refractive index and thickness using cell culture chip ,” μTAS2008(12th International Conference on Miniaturized Systems for Chemistry and Life Sciences),San Diego, California, USA.
17. X. C. Li, Y. C. Seow, J. Wu, K. Xu, J. T. Lin and A. Q. Liu, “A liquid-waveguide-based evanescent wave sensor for high sensitivity real time detection and label free biosensing applications ,” μTAS2008(12th International Conference on Miniaturized Systems for Chemistry and Life Sciences),San Diego, California, USA.
16. X. C. Li, Z. G. Li, H. J. Huang, J. Wu, K. Xu, J. T. Lin and A. Q. Liu, “A liquid waveguide based twin mach-zehnder interferometer for real time particle sorting,” μTAS2008(12th International Conference on Miniaturized Systems for Chemistry and Life Sciences),San Diego, California, USA.
15. H. J. Huang, D. P. Tsai and A. Q. Liu, “A plasmonic liquid waveguide sensor using nanoparticles for label-free measurement applications,” μTAS2008(12th International Conference on Miniaturized Systems for Chemistry and Life Sciences),San Diego, California, USA.
14. Y. F. Yu, T. Bourouina, C. S. Lim, M. K. Chin and A. Q. Liu, “High sensitivity sessile droplet resonator for low concentration protein detection,” μTAS2008(12th International Conference on Miniaturized Systems for Chemistry and Life Sciences),San Diego, California, USA.
13. Z. G. Li, L. K. Chin, H. J. Huang, H. N. Unni and A. Q. Liu, “On-chip liquid tunable grating using laminar microfluidic control system,” μTAS2008(12th International Conference on Miniaturized Systems for Chemistry and Life Sciences),San Diego, California, USA.
12. L. K. Chin, P. H. Yap, C. S. Lim and A. Q. Liu, “Multiphase flow manipulation for continuos refractive index analysis of single living cell,” μTAS2007(11th International Conference on Miniaturized Systems for Chemistry and Life Sciences), Paris, France.
11. L. A. G. Lin , Y. F. Yu, P. H. Yap and A. Q. Liu, "Non-contact measurement of Young's Modulus on single living cells using hydrostatic pressure in a microchamber," μTAS2007(11th International Conference on Miniaturized Systems for Chemistry and Life Sciences), Paris, France.
10. Y. F. Yu, X. M. Zhang, P. H. Yap and A. Q. Liu, "Micro-droplet interferometry for monitoring local pressure of fluidic devices," μTAS2007(11th International Conference on Miniaturized Systems for Chemistry and Life Sciences), Paris, France.
9. Y. F. Yu, X. Zhang, R. Chua, X. M. Zhang, P. H. Yap and A. Q. Liu, "Periodic pressure pulse generator in chip for studying the effect of stress on cell growth," μTAS2007(11th International Conference on Miniaturized Systems for Chemistry and Life Sciences), Paris, France.
8. Y. F. Yu, X. M. Zhang, P. H. Yap and A. Q. Liu, "Particle seperation via adjustable velocity profile generated by EOF and pressure driven flow," μTAS2007(11th International Conference on Miniaturized Systems for Chemistry and Life Sciences), Paris, France.
7. W. Z. Song, A. Q. Liu, C. S. Lim and P. H. Yap, “Optofluidic spectrometer for microchip flow cytometry,” μTAS2007(11th International Conference on Miniaturized Systems for Chemistry and Life Sciences), Paris, France.
6. X. Zhang, R. Chua, P. H. Yap, W. Z. Song and A. Q. Liu, “Immersion refractometry analysis of living cells in microfluidic cell culture chip,” μTAS2007(11th International Conference on Miniaturized Systems for Chemistry and Life Sciences), Paris, France.
5. X. Zhang, R. Chua, P. H. Yap, C. S. Lim and A. Q. Liu, “Diagnosis-on-a-chip: A microfluidic platform for cell culture and virus assays,” μTAS2007(11th International Conference on Miniaturized Systems for Chemistry and Life Sciences), Paris, France.
4. Z. G. Wu, L. K. CHIN, Y. F. Yu, A. Q. Liu, P. H. YAP, C. S. Lim and H. M. Hosseini, "Continuous microfluidic cell/particle separation via combination of eletroosmotic and hydrodynamic spreading,"μTAS2006(10th International Conference on Miniaturized Systems for Chemistry and Life Sciences), 5-9 November, 2006, Tokyo, Japan.
3. W. Z. Song, X. M. Zhang, L. K. CHIN, C. S. LIM, A. Q. Liu, P. H. YAP and H. M.Hosseini, "Optical detection of living cells' refractive indexvia buffer modulation of microfluidic chip," Oral presentation, μTAS2006(10th International Conference on Miniaturized Systems for Chemistry and Life Sciences), 5-9 November, 2006, Tokyo, Japan.
2. X. J. Liang, A. Q. Liu, X. M. Zhang, P. H. Yap, T. C. Ayi, and H. S. Yoon, "Refractive index measurement of single living cell using a biophotonic chip for cancer diagnosis applications," microTAS, 9-13, October, 2005, Boston, USA.
1. Y. Sun, A. Q. Liu, P. H. Yap, and T. C. Ayi, "an integerated biophotonic and microfluidic chip for CD4 cell sorting applications," microTAS, 9-13, October, 2005, Boston, USA.
4. M. F. Karim, A. Q. Liu, A. Alphones and A. B. Yu, "A novel reconfigurable filter using periodic structures," International Microwave Symposium, IEEE Microwave Theory and Techniques Society, 11-16 June, 2006, San Francisco, USA.
3. A. B. Yu, A. Q. Liu, Q. X. Zhang, "Broad-band bandpass and bandstop filters with sharp cut-off frequencies based on series CPW structures," International Microwave Symposium, IEEE Microwave Theory and Techniques Society, 11-16 June, 2006, San Francisco, USA.
2. X. J. Zhang, A. Q. Liu, M. F. Karim, A. B. Yu, Z. X. Shen, "MEMS-based photonic bandgap (PBG) bandstop filter," IEEE Microwave Theory and Techniques Society Digest, 8-12 June 2004, Boston, USA, pp. 1463-1466.
1. M. Tang, W. Palei, W. L. Goh, A. Agarwal, L. C. Law and A. Q. Liu, "A single pole double throw (SPDT) circuit using lateral metal contact micromachined switches," International Microwave Symposium, IEEE Microwave Theory and Techniques Society Digest, 8-12 June 2004, Boston, USA, pp. 581-584.
Patent
4. B. Borovic, F. L. Lewis, A. Q. Liu and D. O. Popa, "Systems and methods for improved control of micro-electrical-mechanical system (MEMS) electrostatic actuator," US Pat No. 7 548 011, 2009.
3. A. Q. Liu, X. J. Liang, X. M. Zhang, Y. Sun and P. Droge, "Systems and methods for improved control of micro-electrical-mechanical system (MEMS) electrostatic actuator," US Pat App No. 20080213821, 2008.
2. A. Q. Liu, X. J. Liang, X. M. Zhang and Y. Sun, “Cell analysis using laser with external cavity,” US Pat App No. 20060268260, 2006.
1. A. Q. Liu, V. M. Murukeshan, X. M. Zhang and C. Lu, "Optical Crossconnect and Mirror System," US Pat No. 6 788 843, 2004.