Geometrically tunable Fabry-Perot filters based on reflection phase shift of high contrast gratings

Liang Fang; Zhendong Shi; Xin Cheng; Xiang Peng; Hui Zhang

doi:10.1117/12.2268417

8 March 2017 Geometrically tunable Fabry-Perot filters based on reflection phase shift of high contrast gratings

Liang Fang, Zhendong Shi, Xin Cheng, Xiang Peng, Hui Zhang

Proceedings Volume 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016; 102554O (2017) https://doi.org/10.1117/12.2268417
Event: Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 2016, Jinhua, Suzhou, Chengdu, Xi'an, Wuxi, China

Abstract

We propose tunable Fabry-Perot filters constituted by double high contrast gratings (HCGs) arrays with different periods acting as reflectors separated by a fixed short cavity, based on high reflectivity and the variety reflection phase shift of HCG array which realize dynamic regulation of the filtering condition. Single optimized HCG obtains the reflectivity of higher than 99% in a grating period ranging from 0.68μm to 0.8μm across a bandwidth of 30nm near the 1.55μm wavelength. The filters can achieve the full width at half maximum (FWHM) of spectral line of less than 0.15nm, and the linear relationship of peak wavelengths and grating periods is established. The simulation results indicate a potential new approach to design a tunable narrowband transmission filter.

Citation Download Citation

Liang Fang, Zhendong Shi, Xin Cheng, Xiang Peng, and Hui Zhang "Geometrically tunable Fabry-Perot filters based on reflection phase shift of high contrast gratings ", Proc. SPIE 10255, Selected Papers of the Chinese Society for Optical Engineering Conferences held October and November 2016, 102554O (8 March 2017); https://doi.org/10.1117/12.2268417

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