Chiang Li-Yuan, Wang Chun-Ta, Pappert Steve, Yu Paul K L
Opt Lett. 2022 Aug 1;47(15):3940-3943. doi: 10.1364/OL.467858.
We propose and demonstrate a passively biased 2 × 2 thermo-optic switch with high power efficiency and fast response time. The device benefits from the highly concentrated optical field of a slot waveguide mode and the strong thermo-optic effect of a nematic liquid crystal (NLC) cladding. The NLC fills the nano-slot region and is aligned by the subwavelength grating inside. The measured power consumption and thermal time constant are 0.58 mW and 11.8 µs, respectively, corresponding to a figure-of-merit of 6.8 mW µs. The proposed silicon-organic hybrid device provides a new solution to design thermo-optic actuators having low power consumption and fast operation speed.
我们提出并展示了一种具有高功率效率和快速响应时间的无源偏置2×2热光开关。该器件受益于狭缝波导模式的高度集中光场以及向列型液晶（NLC）包层的强热光效应。NLC填充纳米狭缝区域并由内部的亚波长光栅排列。测得的功耗和热时间常数分别为0.58 mW和11.8 µs，对应的品质因数为6.8 mW·µs。所提出的硅有机混合器件为设计具有低功耗和快速运行速度的热光致动器提供了一种新的解决方案。
