Chen S. Tsai

Chancellor's Professor, Electrical Engineering and Computer Science
The Henry Samueli School of Engineering

PH.D., Stanford University

Phone: (949) 824-5144
Fax: (949) 824-3732

University of California, Irvine
2224 Engineering Gateway
Mail Code: 2625
Irvine, CA 92697
Research Interests
Silicon Photonics, Silicon Ultrasonic Nozzles for Biomedical Applications, Magnetic Microwave Filters, Magnonic Photonic Crystals
Academic Distinctions
1. Member (Academician) of Academia Sinica (Taiwan, 2000)
2. Russian Academy of Engineering Sciences (Foreign Member, 2001)
3. 1995 International Microoptics Award (this biennial research award has been bestowed jointly by the Optical Society of Japan and the Japanese Applied Physics Society since 1989)
4. UC Irvine Faculty Senate Distinguished Faculty Lectureship for Research (1995)
5. Distinguished Alumnus Award of National Taiwan University in the category of Scholarly Research Achievement (2007)
6. Professor, Above-Scale, UC Irvine (1991)
7. Founding Director and Distinguished Research Fellow, Inst. For Applied Science and Engineering, Academia Sinica (1999-2002)
8. Distinguished Professorship, National Taiwan University (2004 –)
9. Awarded Endowed Chair Professorship at Carnegie-Mellon University (1979)
10. Taiwanese-American Foundation Prize in Science and Engineering (1991)
11. Society Fellow of IEEE, OSA, IAE, SPIE, AAAS, and Russian Popov Society in 1982, 1983, 1983, 1987, 1992, and 2002, respectively
12. UC Irvine Lauds/Laurels Award for Distinguished Research (1987)
13. IEEE Ultrasonics/Ferroelectrics Soc. Distinguished Research Lectureship Award (1987)
14. Best Paper Award of IEEE Reliability and Electronic Devices Groups (1980)
15. Seven other Distinguished/Honorary Professorships of prestigious universities in Taiwan, China, and Japan
16. Outstanding Alumnus Award, College of Engineering, Utah State University (1984)
17. First UC Irvine Engineering Research Award (1986)
18. UC Irvine Engineering Instructor of The Year Award (1985)
Research Abstract
Chen Tsai’s earlier researches were in the fields of Integrated Optics (Guided-Wave Acoustooptics, Magnetooptics, and Electrooptics) and Acoustic Microscopy. His current research focuses on novel silicon-based optical and ultrasonic devices as well as magnetic materials-based microwave devices with real-world applications. Silicon (Si) has been the backbone material of most modern electronic devices such as computers and TV sets. There has been increasing R and D activities worldwide toward realization of next-generation Si-based optical devices and systems with increased capability and reduced production costs. The research thrusts of Tsai’s group are: (1) passive and active devices relevant to the aforementioned goal, (2) Si-based high frequency ultrasonic nozzles capable of producing monodisperse droplets, highly desirable in biomedical applications such as pulmonary drug delivery, and (3) magnetic microwave filters for applications in communication and signal processing systems.
Available Technologies
141 journal papers (21 by invitation) and 239 conference proceedings (80 by invitation), 1 topical volume, 14 encyclopedia/book chapters. Selective publications are as follows:

1. C. S. Tsai and S. K. Yao, “Bragg Diffraction by Standing Ultrasonic Waves with Application to Optical Demultiplexing,” J. Appl. Phys., Vol.43, pp.5081-5084, 1972
2. C. S. Tsai, Le T. Nguyen, S. K. Yao and M. A. Alhaider, “A High Performance Acoustooptic Guided-Light Beam Device Using Two Tilting Surface Acoustic Waves,” Appl. Phys. Lett., Vol.26, pp.140-142, 1975
3. C. S. Tsai and P. Saunier, “Guided-Light Beam Deflection and Switching Using Electrooptic Prism Structure in LiNbO3 Waveguides,” Appl. Phys. Lett., Vol.27, pp.248-250, 1975
4. B. Kim and C.S. Tsai, “High-Performance Guided-Wave Acoustooptic Scanning Devices Using Multiple Surface Acoustic Waves,” Proc. IEEE, Vol.64, Special Issue on Surface Acoustic Waves, pp.788-793, 1976 (Invited Paper)
5. W.S.C. Chang, C.S. Tsai, R.A. Becker, and I.W. Yao, “Convolution Using Guided Acoustooptical Interaction in Thin-Film Waveguides,” IEEE J. Quantum Electronics, Vol.QE-13, pp.208-215, 1977
6. C. S. Tsai, S. K. Wang, and C. C. Lee, “Visualization of Solid Material Joints Using a Transmission-Type Scanning Acoustic Microscope,” Appl. Phys. Lett., Vol.31, pp.317-320, 1977
7. C. S. Tsai, B. Kim and F. Akkari, “Optical Channel Waveguide Switch and Coupler Using Total Internal Reflection,” IEEE J. Quantum Electron., Vol.QE14, pp.513-517, 1978
8. C. S. Tsai, “Guided-Wave Acoustooptic Bragg Modulators for Wideband Integrated Optic Communications and Signal Processings,” Special Issue on Integrated and Guided Wave Optical Circuits and Systems, Vol.CAS-26, pp.1072-1098, 1979. (Invited paper) Nominated by IEEE Circuit and Systems Society for IEEE Donald Fink Award
9. C. C. Lee, K. Y. Liao, C. L. Chang, and C. S. Tsai, “Wideband Guided-Wave Acousto-Optic Bragg Detector Using a Tilted-Finger Chirp Transducer,” IEEE J. Quantum Electron, Vol.QE-15, pp.1166-1170, 1979
10. J. K. Wang and C. S. Tsai, “Reflection Acoustic Microscopy for Thick Specimens,” J. Appl. Phys., Vol.55, pp.80-88, 1984
11. D. Y. Zang and C. S. Tsai, “Single-Mode Waveguide Microlenses and Microlens Arrays Fabrication Using Titanium Indiffusion Proton Exchange Technique in LiNbO3,” Appl. Phys. Lett., Vol.46, pp.703-705, 1985
12. Q. Li, C. S. Tsai, S. Sottini, and C. C. Lee, “Light Propagation and Acoustooptic Interaction in a LiNbO3 Spherical Waveguide,” Appl. Phys. Lett., Vol.46, pp.707-709, 1985
13. C. S. Tsai, D. Young, W. Chen, L. Adkins, C. C. Lee, and H. Glass, “Noncollinear Magnetooptic Interaction of Guided-Optical; Wave and Magnetostatic Surfaces Waves in YIG/GGG Waveguides,” Appl. Phys. Lett., Vol.47, pp.651-654, 1985
14. C. J. Lii, C. S. Tsai, and C. C. Lee, “Wideband Acoustooptic Bragg Cells in GaAsGaAlAs Waveguides,” IEEE J. Quantum Electron., Vol.QE-22, Special Issue on Integrated Optic Circuits, pp.868-872, 1986
15. X. Cheng and C. S. Tsai, “Electrooptic Bragg-Diffraction Modulator in GaAsGaAlAs Heterostructure Waveguide,” J. Lightwave Technology: Special Issue on Integrated Optic, Vol.6, pp.809-817, 1988
16. T. Vu, J. Norris, and C. S. Tsai, “Planar Waveguide Lenses in GaAs Using Ion Milling,” Appl. Phys. Lett., Vol.54, pp.1098-1100, 1989
17. D. Young and C. S. Tsai, “X-Band Magnetooptic Bragg Cells Using Bismuth-Doped Yttrium Iron Garnet Waveguides,” Appl. Phys. Lett., Vol.54, pp.2242-2244, 1989
18. Y. Abdelrazek, C. S. Tsai, and T. Q. Vu, “An Integrated Optic RF Spectrum Analyzers in A ZnO-GaAs-AlGaAs Waveguide,” IEEE J. Lightwave Tech., Vol.8, pp.1833-1838, 1990
19. C. S. Tsai and P. Le, “A 4 X 4 Nonblocking Integrated Acoustooptic Space Swithc,” Appl. Phys. Lett., Vol.60, pp.431-433, Jan. 1992
20. C. S. Tsai, “Integrated Acoustooptic Circuits and Applications,” IEEE Trans, Ultrasonics, Ferroelectrics and Frequency Control, Vol.39, pp.529-554, Sept. 1992 (Invited Distinguished Lecture Paper)
21. Z. Y. Cheng and C. S. Tsai, “Baseband Integrated Acoustooptic Frequency Shifter,” Appl. Phys. Lett., Vol.60, pp.12-14, Jan. 1992
22. Y. Pu. C. L. Wang and C. S. Tsai, “Magnetostatic Backward Volume Wave-Based Guided-Wave Magnetooptic Bragg Cells and Application to Wide-Band Light Beam Scanning,” IEEE Photonics Technology Lett., Vol.3, pp.462-465, May 1991
23. A. K. Roy and C. S. Tsai, “A 8 X 8 Symmetric Nonblocking Integrated Acoustooptic Space Switch Module in LiNbO3,” IEEE Photonics Technology Lett., Vol.4, pp.731-734, July 1992
24. G. D. Xu and C. S. Tsai, “Integrated Acoustooptic Heterodyning Device Modules in LiNbO3 Substrate,” Appl. Opt., Vol.31, GRIN Special Issue, pp.5259-5268, Sept. 1992
25. A. Kar-Roy and C. S. Tsai, “Integrated Acousto-optic Tunable Filters Using Weighted Coupling,” IEEE J. Quantum Electron, Vo1.30, 1574-1586, 1994
26. C. S. Tsai, “Integrated Acoustooptic and Magnetooptic Bragg Cell Modules for Information Processing,” IEEE Proc., Vol.84, Special Issue on Optical Information Processing, pp.853-869, 1996 (Invited Paper)
27. C. S. Tsai, “Magnetostatic Waves-Based Integrated Magnetooptic Devices and Applications,” IEEE Trans. on Magnetics, Vol.32, pp.4118-4123, 1996 (Invited Paper)28. S. C. Tsai, P. Luu, P. Childs, A. Teshome, and C. S. Tsai, “The Role of Capillary Waves in Two-Fluid Atomization,” Physics of Fluids, Vol.9, 2909-2918, 1997
29. C. S. Tsai, Y..S. Lin, J. Su, and S. Calciu, “High Efficiency Guided-Wave Magnetooptic Bragg Cell Modulator Using Nonuniform Bias Magnetic Field,” Appl. Phys. Lett., Vol.70, pp.3185-3187, 1997
30. D. Grolemund and C.S. Tsai, “Statistical Moments of Backscattered Ultrasound in Porous Fiber Reinforced Composites,” IEEE Trans. Ultrasonics/Ferroelectrics/Frequency Control, Vol.45, pp.295-304, 1998
31. C.S. Tsai, D. Young, and S. Nikitov, “Microwave and Magnetooptic Measurements of Nonlinear Dispersive Magnetostatic Wave in YIG Waveguides, “J. Appl. Phys., Vol. 84, 1670-1679, 1998
32. A. M. Matteo, C. S. Tsai, and N. Do, “High-Efficiency Collinear Guided-Wave Acoustooptic Interactions in LiNbO3,” IEEE Trans. on Ultrasonics, Ferroelectrics and Frequency Control, Vol.47, pp.16-28, 2000
33. S. C. Tsai, P. Luu, P. Tam, G. Roski, and C. S. Tsai, “Flow Visualization of Taylor-mode Breakup of a Viscous Jet,” AIP Physics of Fluids, Vol.11, pp.1331-1341, 1999
34. C.S. Tsai, and J. Su, “A Wideband Electronically Tunable Microwave Notch Filter Using Iron-Garnet-Gallium Arsenide Layer Structure,” Appl. Phys. Lett., Vol.74, pp.2079-2880, 1999
35. C. S. Tsai, J. Su, and C. C. Lee, “Wideband Microwave Notch Filter Using Iron-Gallium Arsenide Layer Structure,” IEEE Trans. On Magnetics, Vol. 35, 3178-3180, 1999
36. C. S. Tsai, “Tunable Devices Using Ferromagnetic Film-GaAs,” J. of Mag. and Mag. Mat, Vol.209, 10-14, 1999 (Invited Paper)
37. C. S. Tsai, W. Chen, P. Le, and S. C. Tsai, “Acousto-optic Interactions/Devices in Spherical Waveguide,” J. of Optics A: Pure and Appl. Optics, Vol.3, S46-S53, 2001 (Invited Paper)
38. S. A. Nikitov, Ph. Tailhades, and C. S. Tsai, “Spin Waves in Periodic Magnetic Structures-Magnonic Crystals,” J. of Mag. and Mag. Mat, Vol.236, 320-330, 2001
39. W. Wu, C. C. Lee, C. S. Tsai, H. Hopster et al., “Epitaxial Fe/Ag Films” J. of Crystal Growth., Vol.225, 534-539, 2001
40. S.C. Tsai, Y.L. Song, T.K. Tseng, Y.F. Chou, W.J. Chen, and C.S. Tsai, “High Frequency Silicon-Based Ultrasonic Nozzles Using Multiple Fourier Horns,” IEEE Trans. on Ultrasonics/Ferroelectrics and Frequency Control, Vol. 51, 277-286, 2004
41. M.J. Chen, J.L. Yen, J.Y. Li, J.F. Chang, S.C. Tsai, and C.S. Tsai, “Stimulated Emission in a Nanostructured Silicon PN Junction Diode Using Current Injection,” Applied Physics Letters, Vol. 84, 2163-2166, 2004 (selected for inclusion in the March 26, 2004 issue of Virtual J. of Nanoscale Science and Technology)
42. Y.V. Gulyaev, S.A. Nikitov, C.S. Tsai, et al., “Ferromagnetic Films with Magnon Bandgap Periodic Structures: Magnon Crystals,” JETP Letters, Vol. 77, 567-570, 2003 (selected for inclusion in Virtual J. of Nanoscale Science and Technology)
43. K. Shiraishi and C.S. Tsai, “A Micro Light Beam Spot-Size Converter Using Hemi-Cylindrical GRIN-Slab Tip,” J. of Lightwave Technology, Vol. 23, 3821-3826, 2005
44. C.S. Tsai, G. Qiu, H. Gao, G.P. Li, L.W. Yang, and S.A. Nikitov, “Tunable Wideband Microwave Band-Stop and Band-Pass Filters Using YIG/GGG-GaAs Layer Structures,” IEEE Transaction on Magnetics, Vol. 41, 3568-3570, 2005
45. S.C. Tsai, Y.L. Song, C.S. Tsai, Y.F. Chou, and C.H. Cheng, “Ultrasonic Atomization Using MHz Silicon-Based Multiple-Fourier Horn Nozzles,” Applied Physics Letters, Vol. 88, 014102, January 2, 2006 (selected for inclusion in the January 16, 2006 issue of Virtual Journal of Nanoscale Science and Technology)
46. M. J. Chen, C. S. Tsai, and M.K. Wu, “Optical Gain and Co-Stimulated Emission of Photons and Phonons in Indirect Bandgap Semiconductors,” Japanese J. of Applied Physics, Vol. 45, 6576-6588, 2006 (Invited Paper)
47. H. Yoda, H. Ikedo, T. Ketsuka, A. Irie, K. Shiraishi, and C.S. Tsai, “A High-Performance Micro-GRIN-Chip Spot-Size Converter Formed with Focused Ion Beam,” IEEE Photonics Tech. Lett., Vol. 18, 1554-1556, 2006
48. H. Yoda, H. Ikedo, K. Shiraishi, and C.S. Tsai, “A Silicon-Based Spot-Size Converter between Single-Mode Fibers and Si-Wire Waveguide using Cascaded Tapers,” Applied Physics Letters, Vol. 91, Oct. 1, 141120, 2007
49. G. Qiu, C.S. Tsai, M.M. Kobayashi, and S.T. Wang, “Enhanced Microwave Ferromagnetic Resonance Absorption and Bandwidth Using A Microstrip Meander-Line Step-Impedance Low Pass Filter in A YIG-GaAs Layer Structure,” (Special Issue of Journal of Applied Physics, May 2008, In Press)
50. R.W. Mao, C.S. Tsai, J.Z. Yu, and Q.M. Wang, “Narrow Line-Width Resonant Cavity Enhanced Photdetectors Operating at 1.55 um,” (Optic Communications, 2008, In Press)
Graduate Programs
Biomedical Engineering

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