摘要

Plasmonic resonance may also be utilized to enhance the light absorption in nanostructures. The absorbed light is then turned into thermal energy, generating photothermal effects, which give rise to many interesting applications, such as ultrafast nanoscale heating, nanoparticle surface melting and reshaping, photothermal tuning of silicon resonators, etc. For instance, through photothermal effects, it is demonstrated that gold nanoparticles can be melted and then transferred to another substrate, while transferred nanoparticles can exhibit good size uniformity and the sizes are controllable. Also, if a plasmonic light absorber is integrated with a silicon disk or ring resonator, one can achieve all-optical photothermal switching in the silicon disk resonator utilizing relatively large thermo-optic coefficient of silicon, with a measured response time of 2.6 µs and switching optical power of only 0.5 mW. On the other hand, the behaviors of thermal radiations of nanostructures can also be significantly modified, which can also provide new opportunities including thermal memory and thermal self-oscillations. 

报告人简介

仇旻， 1975年生， 1995年和1999年在浙江大学获得理学学士和凝聚态物理博士学位，并于2001年获得瑞典皇家工学院电磁理论工学博士。2001年被聘为瑞典皇家工学院助理教授，2005年晋升副教授，2009年晋升为光子学正教授。现任浙江大学光电信息工程学系教授、现代光学仪器国家重点实验室主任。曾获得“瑞典战略研究基金会”资助的“未来科研带头人”基金、瑞典国家科学研究基金会高级研究员基金等。2014年获国家杰出青年基金项目资助。主要开展纳米光子学方向研究，如新型微纳器件的制造工艺、微纳光电子器件、新型光学材料等。已在国际杂志上发表SCI论文共计170余篇，SCI论文他引总计超过4000次，h指数为40。2013年底当选美国光学学会会士（OSA Fellow）和国际光学工程学会会士（SPIE Fellow）。现担任国际著名期刊Optics Communications编辑、Light: Science & Applications (LSA)(Nature publishing group) 专题编辑（Topical Editor）等。