A broadband TM-pass polarizer based on graphene-incorporated rib-loaded LNOI waveguide

Ting Hao; Longzhao Lu; Dennis Zhou; Guijun Ji; Xinglong Wang

doi:10.1117/12.2651115

23 January 2023 A broadband TM-pass polarizer based on graphene-incorporated rib-loaded LNOI waveguide

Ting Hao, Longzhao Lu, Dennis Zhou, Guijun Ji, Xinglong Wang

Proceedings Volume 12556, AOPC 2022: Optoelectronics and Nanophotonics; 125560U (2023) https://doi.org/10.1117/12.2651115
Event: Applied Optics and Photonics China 2022 (AOPC2022), 2022, Beijing, China

Abstract

A broadband TM-pass polarizer is proposed with the structure of graphene-incorporated rib-loaded LNOI waveguide. As graphene is a 2D material, it only brings loss to the optical mode with polarization direction parallel to graphene’s surface plane. By incorporating graphene onto the interface of LNOI platform and rib loading material, graphene mainly brings optical loss to TE mode. The proposed device can obtain high polarization extinction ratio ⪆40 dB while keep a low insertion loss < 0.5 dB to the TM mode. Since graphene has a wideband light absorption from visible to infrared, the working wavelength range of this device is broadband. The fabrication process of proposed polarizer is CMOScompatible, and it can be integrated into LNOI PIC. This polarizer can be applied for LNOI modulator and LNOI-based fiber gyroscope system.

Citation Download Citation

Ting Hao, Longzhao Lu, Dennis Zhou, Guijun Ji, and Xinglong Wang "A broadband TM-pass polarizer based on graphene-incorporated rib-loaded LNOI waveguide", Proc. SPIE 12556, AOPC 2022: Optoelectronics and Nanophotonics, 125560U (23 January 2023); https://doi.org/10.1117/12.2651115

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