| 报告题目 | Ultrafast spectroscopy on active plasmonic devices |
| 报告人 | 王卫 教授 |
| 报告人单位 | 德国奥尔登堡大学物理与界面科学中心 |
| 报告时间 | 2014-06-05 |
| 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 |
| 报告介绍 | 报告摘要：
Active plasmonic devices are composed of traditional (passive) plasmonic nanostructures hybridized with active materials such as organic molecules and inorganic semiconductors. The functional materials are capable of compensating ohmic losses along with the direct generation of surface plasmon polaritons (SPPs) to achieve ultrafast signal switching, coherent control and modulation, or even amplification.
Therefore, the resulting “active plasmonics” has emerged as an extremely promising subject with several potential applications in ultrafast all-optical switching, nanoscale plasmonic circuits, information technologies, and SPP lasing.
We focus on hybrid nanostructures comprised of J-aggregate excitons and surface plasmon polaritons supported by metal nanostructures. The optical response of the system is probed at the field level by angle-resolved spectral interferometry. Their ultrafast dynamics are investigated by the non-linear pump-probe spectroscopy. We observed for the first time the ultrafast Rabi oscillations (in femtosecond scale) and reveals the physics behind a strong modification of the radiative damping in the hybrid systems, which are expected to open up interesting directions in coherent active plasmonics. |
