摘要
The photonic spin Hall effect plays an important role in photonic information technologies,especially in on-chip spin Hall devices.However,conventional devices suffer from low efficiency or narrow bandwidth,which prevents their practical application.Here,we introduce a spin Hall device using inverse design to achieve both high efficiency and broadband.Spin-dependent light separation is enabled by a 2.4μm circular device with 100 nm pixels.The photonic spin Hall element is fabricated on a silicon-on-insulator wafer compatible with a standard integrated photonic circuit.The spin light is detected and emitted with an efficiency of up to 22%and 35%,respectively,over a 200 nm bandwidth at optical wavelength.
基金
National Natural Science Foundation of China(U1701661,61935013,11774240,11604218,61975133,11604219)
National Key R&D Program of China(2018YFB1801801)
Leading Talents Program of Guangdong Province(00201505)
Shenzhen Science and Technology Innovation Commission(KQTD2015071016560101,KQTD20170330110444030,KQJSCX20170727100838364,JCYJ20180507182035270,ZDSYS201703031605029)
Natural Science Foundation of Guangdong Province(2016A030312010)
Shenzhen University(2019075)。
