报告题目: Optical absorption engineering of ultra-thin films using metamaterial and nanocavity resonances

报告人: Prof. Qiaoqiang Gan (The State University of New York at Buffalo)
主持人: 陈沁 研究员
时间: 2014.07.01 14:00
地点: A718 

报告摘要:
Perfect absorbers are important optical components required by a variety of applications. For instance, efficient optical absorbers are highly desired on the microscale where they can play a significant role in preventing crosstalk between optical interconnects on integrated photonic chips. In the thermal spectral region, waste heat is a major energy loss (including thermal radiation loss) in both industrial sectors and our daily life. While there is great interest in achieving highly absorptive materials exhibiting large broadband absorption using optically thick, micro-structured materials, it is still challenging to realize ultra-compact subwavelength absorber for on-chip optical/thermal energy applications. In recent years, intensive research efforts have been performed to realize compact/portable resonant absorbers. However, these resonant absorbers can usually be realized within relatively narrow bands at microwave, terahertz and infrared - visible frequencies for given incident angle and polarization state, due to the inherently narrow-band plasmon resonances. To overcome these limitations, in this presentation, we will discuss nanocavity enhanced light-matter interaction in ultra-thin films and patterned hyperbolic meta-film with engineered and freely tunable absorption band. These on-chip absorbers can easily be integrated with other on-chip electronic/optoelectronic devices, which is promising to create new regimes of optical/thermal physics and applications.



报告人个人简介
Dr. Qiaoqiang Gan is an Assistant Professor in the Department of Electrical Engineering at University at Buffalo, The State University of New York. He received his Bachelor's degree from Fudan University, Shanghai, China in 2003, his Master’s degree in 2006 in nanophotonics at the Nano Optoelectronics Lab in the Institute of Semiconductors at the Chinese Academy of Sciences, and his PhD degree from Lehigh University in 2010. He received IEEE Photonic Society Student Fellowship Award and Chinese Government Scholarship for Graduate Students Abroad in 2009. In 2013, he was also featured by Society of Manufacture Engineers’ “Innovations that could change the way you Manufacture”: Everyday Spectrometer: True Color Detection with Rainbow Polymer. His current research interests include nanophotonics, plasmonics, and bio-photonics. His research publications include over 70 technical papers and 4 patents.？