Progress and prospects of silicon-based design for optical phased array

Weiwei Hu; Chao Peng; Connie Chang-Hasnain

doi:10.1117/12.2214155

15 March 2016 Progress and prospects of silicon-based design for optical phased array

Weiwei Hu, Chao Peng, Connie Chang-Hasnain

Proceedings Volume 9757, High Contrast Metastructures V; 97570U (2016) https://doi.org/10.1117/12.2214155
Event: SPIE OPTO, 2016, San Francisco, California, United States

Abstract

The high-speed, high-efficient, compact phase modulator array is indispensable in the Optical-phased array (OPA) which has been considered as a promising technology for realizing flexible and efficient beam steering. In our research, two methods are presented to utilize high-contrast grating (HCG) as high-efficient phase modulator. One is that HCG possesses high-Q resonances that origins from the cancellation of leaky waves. As a result, sharp resonance peaks appear on the reflection spectrum thus HCGs can be utilized as efficient phase shifters. Another is that low-Q mode HCG is utilized as ultra-lightweight mirror. With MEMS technology, small HCG displacement (~50 nm) leads to large phase change (~1.7π). Effective beam steering is achieved in Connie Chang-Hasnian’s group. On the other hand, we theoretically and experimentally investigate the system design for silicon-based optical phased array, including the star coupler, phased array, emission elements and far-field patterns. Further, the non-uniform optical phased array is presented.

Citation Download Citation

Weiwei Hu, Chao Peng, and Connie Chang-Hasnain "Progress and prospects of silicon-based design for optical phased array", Proc. SPIE 9757, High Contrast Metastructures V, 97570U (15 March 2016); https://doi.org/10.1117/12.2214155

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