报告题目: |
Systems Thermal and non-thermal phenomena and applications in ultrafast/evanescent radiation interaction with matter |
报告人: |
Zhixiong Guo |
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Prof. The State University of New Jersey
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报告时间: |
2009-06-18 16:30 |
报告地点: |
热能工程系学术报告厅 |
主办单位: |
热能系 |
简介: |
Thermal and non-thermal phenomena and applications in ultrafast/evanescent radiation interaction with matter
Zhixiong “James” Guo
Associate Professor
Mechanical and Aerospace Engineering
Rutgers, The State University of New Jersey
Piscataway, NJ 08854, USA
In this talk, I will introduce the two research thrusts in my lab at Rutgers University-New Brunswick: (1) ultrafast laser radiation transport and applications in biomedical optical imaging, thermal treatment, and tissue microprocessing; and (2) evanescent radiation in optical microcavities and innovative micro/nano sensors. In the first topic, we will emphasize on the modeling and validation of ultrashort-pulsed laser radiation propagation in turbid tissues, the associated thermal and non-thermal phenomena, and some new concepts for optical tomography. In the modeling of ultrafast radiation heat transfer, we are among the first to consider the time-dependence of light propagation in multiple dimensional problems. In the tissue microprocessing, optical breakdown due to extremely high radiation density is used for plasma-induced tissue ablation for tissue decontamination and separation. In the second topic, we will discuss the whispering-gallery mode (WGM) optical resonance and its applications in micro/nanoscale sensing. WGMs describe resonant electromagnetic modes of photons that circulate in well-defined trajectories inside a microcavity. Under resonance, an enhanced radiation field exists inward the periphery of the cavity. A very strong evanescent field will then arise. This evanescent field will certainly interact with target biomolecules adsorbed or covalently attached to the microcavity and consequently induce changes in the WGM resonant signals which can be explored for innovative probing of biomolecules. The resonance is also morphology-dependent and can be designed for temperature measurement with unprecedented fine resolution.
Dr. Zhixiong Guo is a tenured Associate Professor of Mechanical and Aerospace Engineering at Rutgers University-New Brunswick/Piscataway. He received his B.S., M.S., and Doctorate, all in Engineering Physics, from Tsinghua University, Beijing, in 1989, 1991 and 1995, respectively. Then he worked as a Research Fellow in Korean Advanced Institute of Science and Technology (KAIST), Taejon, South Korea, and a Research Associate in Tohoku University, Sendai, Japan. From 1999 to 2001, he worked as a Research Staff Member in Polytechnic Institute of NYU, Brooklyn, NY, where he completed his Ph.D. in Mechanical Engineering in the same time period. His research interests include radiation-matter interactions, laser applications in biology and medicine, and thermal radiation heat transfer. Currently he is focusing on integrating nanophotonics with biotechnology, and conducting emerging technological applications such as MEMS/NEMS sensors, material microprocessing, biomedical imaging and sensing at the molecular level. His research is funded by the National Science Foundation, NASA/NJSGC, USDA, MTF, NIH, New Jersey Nanotechnology Consortium, Rutgers University Academic Excellence Funds Awards, Charles and Johanna Busch Memorial Funds Awards, and other sources. He also received a teaching award from Rutgers Vice President Office for Undergraduate Education for curriculum development. He is the author or co-author of over 100 SCI/EI-cited publications; and an active member in ASME, OSA, and SPIE. He is currently the President of the Chinese in America Thermal Engineering Association (CATEA) which promotes China-USA collaborations in thermal science/engineering research and education.
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