报告题目: |
Silicon Nanomembrane Based Nanophotonic Devices and Application |
报告人: |
Ray T. Chen |
|
Cullen Trust Endowed Professor
Fellow of IEEE, OSA and SPIE
Nanophotonics and Optical Interconnects Research Lab
Microelectronics Research Center
The University of Texas, Austin
|
报告时间: |
2011-11-08 14:30 |
报告地点: |
精仪系四楼会议室9003大楼4304房间 |
主办单位: |
精仪系 |
简介: |
Abstact In recent years, silicon nanomembrane-based nanophotonic devices are being developed to function as passive and active devices for communications and also as microarrays for chemical and biological assays. In this presentation, photonic crystal based devices on silicon nanomembrane will be presented for these applications.
Photonic crystals are a relatively new platform that have generated significant interest over the last decade due to their ability to confine light to ultra-small mode volumes in addition to their high sensitivity to changes in refractive index of the ambient that promises the potential for creating high-density microarrays. Various designs of photonic crystal (PC) slotted waveguides and microcavities have been proposed for modulation, chemical and bio-sensing with small mode volumes. In the modulator formation, we design and fabricate a 320nm slot for an electro-optic (E-O) polymer infiltrated silicon photonic crystal waveguide. Because of the large slot width, the poling efficiency of the infiltrated E-O polymer (AJCKL1/amorphous polycarbonate) is significantly improved. When coupled with the slow light effect from the silicon photonic crystal waveguide, an effective in-device r33 of 735pm=V, which to our knowledge is a record high, is demonstrated, which is ten times higher than the E-O coefficient achieved in thin film material. Because of this ultrahigh E-O efficiency, the VπL of the device is only 0:44Vmm, which is to our knowledge the best result of all E-O polymer modulators. Detection principle in all instances is based on the specific binding of the biomolecule of interest to its specific conjugate biomolecule receptor bound to the optical device substrate, which causes a change in the refractive index and hence a change in the transduced signal. While it is possible to design sensors with ultra-small mode volumes, current bio-molecule patterning technologies limit the minimum spacing between resonators in an array when each sensor is coated with a unique biomolecule receptor.
Resume Ray Chen is a professor in the Department of Electrical and Computer Engineering at The University of Texas Austin, and holds the Cullen Trust for Higher Education Endowed Professorship in Engineering. He is also the director of the AFOSR MURI-Center for Silicon Nanomembrane involving faculty from Stanford, UIUC, Rutgers, and UT Austin. He received his BS degree in Physics in 1980 from the National Tsing Hua University in Taiwan, his MS degree in physics in 1983, and his PhD degree in Electrical Engineering in 1988, both from the University of California. His research work has been awarded over 100 research grants and contracts from such sponsors as DOD, NSF, DOE, EPA, NIH, NASA, the State of Texas, and private industry. His group at UT Austin has reported its research findings in more than 600 published papers, including over 85 invited papers. He holds 18 issued patents. He has chaired or been a program-committee member for more than 100 domestic and international conferences organized by IEEE, SPIE, OSA, and PSC. He has served as an editor, co-editor or coauthor for over twenty books. Chen is a Fellow of IEEE, OSA, and SPIE. He was the recipient of the 1987 UC Regent’s Dissertation Fellowship and the 1999 UT Engineering Foundation Faculty Award, for his contributions in research, teaching and services. He was also the recipient of the 2008 IEEE Teaching Award, and the 2010 IEEE HKN Loudest Professor Award.
During his undergraduate years at the National Tsing Hua University he led the 1979 university debate team to the Championship of the Taiwan College-Cup Debate Contest.
Chen has supervised and graduated 37 PhD students from his research group at UT Austin. |
|
