4.7 Article

Ultra-Broadband and Compact TM-Pass Polarizer Based on Graphene-Buried Polymer Waveguide

Journal

POLYMERS
Volume 14, Issue 7, Pages -

Publisher

MDPI
DOI: 10.3390/polym14071481

Keywords

integrated optics; polymer optical waveguides; optical communication systems; monolayer graphene; polarizer

Funding

  1. National Key R&D Program of China [2019YFB2203002]
  2. National Natural Science Foundation of China [61875069]
  3. Fundamental Research Funds for the Central Universities

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We have reported an ultra-broadband and compact TM-pass polarizer based on graphene-buried polymer waveguides. This polarizer demonstrates high extinction ratio, ultra-broadband, low cost, and easy integration with other polymer-based planar lightwave devices.
We report an ultra-broadband and compact TM-pass polarizer based on graphene-buried polymer waveguides. The characteristic parameters of the polarizer were carefully designed and optimized. The standard microfabrication processes were employed to fabricate the device. The presented polarizers exhibit high polarization-dependent transmission imposing a TE mode cutoff while leaving the TM mode almost unaffected. We experimentally demonstrated the polarizer that has an ultra-high extinction ratio of more than 22.9 dB and 41.9 dB for the monolayer graphene film placed on the surface of core layer and buried in the center of core layer, respectively, and as low insertion loss as similar to 4.0 dB for the TM mode with the bandwidth over 110 nm. The presented polarizer has the advantages of high extinction ratio, ultra-broadband, low cost, and easy integration with other polymer-based planar lightwave devices.

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