Tuning silicon photonic devices based on photothermal effects(1)

The International Symposium on Photonics and Optoelectronics(SOPO 2014)——Silicon-on-insulator (SOI) technology is an excellent platform for integrated photonic circuits, due to its good light confinement and low propagation loss. We have numerically and experimentally investigated the effect of photothermal tuning of Si waveguides and resonators integrated with a plasmonic nano heater, i.e. optical absorber. For a Si micro disk resonator, an optical absorber can be integrated directly on its top, to minimize the overall heat capacity of the device and maximize the heat conduction from the heat source to the substrate. The temporal response of the proposed structure is relatively fast with rise/fall time around 2.0 μs. The performance of our all-optically pumped photonic devices is close to the state-of-the-art values in thermal-optical switches based on an electrode-driven heater. Comparatively, plasmonic light absorbers have advantages such as compact size, low heat capacity, high efficient light-to-heat conversion and elementary fabrication process. Photothermal optical switching via this approach can be important for applications, where contactless light switching or routing is needed.

关键词: 硅光子器件 光热效应 绝缘体上硅技术 纳米集成光路

主讲人:Prof. Min Qiu 机构:State Key Laboratory of Modern Optical Instrumentation,Department of Optical Engineering,Zhejiang University

时长:0:21:32 年代:2014年