Coherent Control of Optical Spin-to-Orbital Angular Momentum Conversion in Metasurface.

Zhang, Huifang; Kang, Ming; Zhang, Xueqian; Guo, Wengao; Lv, Changgui; Li, Yanfeng; Zhang, Weili; Han, Jiaguang · Adv Mater · 2017

basic_science · Level V

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Abstract

Efficient control over the conversion of optical angular momentum from spin to orbital form in a metasurface system is achieved. Under coherent symmetric incidence, it can support nearly 100% conversion and unitary output, while it can support 50% conversion with 25% transmittance under one beam incidence.