Engineering the PhC-slab waveguide for designing TM-pass polarization filter by restoring their polarization filtering property

Chandra Prakash; Akash Kumar Pradhan; Yadvendra Singh; Rashmi Pant

doi:10.1117/12.2649885

13 March 2023 Engineering the PhC-slab waveguide for designing TM-pass polarization filter by restoring their polarization filtering property

Chandra Prakash, Akash Kumar Pradhan, Yadvendra Singh, Rashmi Pant

Author Affiliations +

Proceedings Volume 12426, Silicon Photonics XVIII; 124260R (2023) https://doi.org/10.1117/12.2649885
Event: SPIE OPTO, 2023, San Francisco, California, United States

Conference Poster

Abstract

The polarization filtering property of ideal PhC waveguides can be reinstated in the practical PhC slab waveguide also which was compromised due to the newly originated index guided modes in PhC slab waveguides. This can be done by controlling the side wall corrugation of the guiding portion of the PhC waveguide. By doing so, the guided TE, TM, and continuum of bands can be decoupled with each other for a sufficient range of operating frequencies. This way a TM-pass efficient polarization filters has been shown using silicon PhC slab waveguide, which gives a maximum extinction ratio of ≈ 43 dB, insertion-loss -0.5 dB along with ≈ 100 dB nm bandwidth in merely 20 periods long structure.

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Chandra Prakash, Akash Kumar Pradhan, Yadvendra Singh, and Rashmi Pant "Engineering the PhC-slab waveguide for designing TM-pass polarization filter by restoring their polarization filtering property", Proc. SPIE 12426, Silicon Photonics XVIII, 124260R (13 March 2023); https://doi.org/10.1117/12.2649885

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