| 报告题目 | Low-Loss, Active Plasmonics Based on Novel Silver Macro-, Meso-, and Nanostructures |
| 报告人 | Prof. Shangjr Gwo (果尚志) |
| 报告人单位 | National Tsing-Hua University, Taiwan |
| 报告时间 | 2014-06-10 |
| 报告地点 | 合肥微尺度物质科学国家实验室九楼会议室 |
| 主办单位 | 合肥微尺度物质科学国家实验室、国际功能材料量子设计中心 |
| 报告介绍 | 报告摘要：
Surface plasmon polaritons (SPPs) supported on noble-metal surfaces possess larger wavevectors than that of light at the same frequency from the visible to the infrared frequency range. Therefore, noble-metal nanostructures can function as near-field transducers to compress light below the diffraction limit and to realize diffraction-unlimited applications such as plasmonic nanoantennas, nanolasers, and nanocircuits. However, the real-world applications of SPPs are very sensitive to plasmonic losses. Recently, several works, including our own, have demonstrated that ultrasmooth and single-crystalline silver epifilms as well “giant” colloidal crystals exhibit lowest plasmonic losses. Here, I will present some important applications based on these novel silver macro, meso-, and nanostructures, including ultralow-threshold and all-color plasmonic nanolasers, as well as uniform surface-enhanced Raman spectroscopy (SERS) substrates for quantitative single-molecule sensing. In combination with the focused ion beam milling technique, we can also fabricate high-quality plasmonic nanocavities, nanocircuits, and nanoantennas on these colloidal Ag crystals. By incorporating III-nitride semiconductor nanostructures as local coherent SPP sources (spasers) into these plasmonic structures, low-loss, active integrated plasmonic systems can become reachable in the near future.
报告人简介：
Prof. Shangjr (Felix) Gwo received his Ph.D. in physics from the University of Texas at Austin, USA in 1993. From 1994 to 1997, he worked in Tsukaba, Japan as a researcher. He joined National Tsing-Hua University (NTHU), Hsinchu, Taiwan as a faculty member in 1997. From 2010 to 2014, he served as the Vice President for Research and Development in NTHU and he is currently a Chair Professor of Physics. His research interests include semiconductor material physics, nanophotonics, nanoplasmonics, and surface/interface science. Most recently, his research group focuses efforts on the research of plasmonic metamaterials composed of colloidal metal nanoparticles, plasmonic nanolasers, surface-enhanced Raman spectroscopy (SERS), surface-plasmon integrated quantum systems, and III-nitride nanostructure light-emitting devices and photodetectors. He has published around 200 peer-reviewed papers with over 3000 citations. He is an elected fellow of the American Physical Society. |
