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Polarization‐independent liquid crystal‐based refractive index sensor
Author(s) -
Yang Zhiyong,
Zhan Tao,
Wu ShinTson
Publication year - 2021
Publication title -
journal of the society for information display
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.578
H-Index - 52
eISSN - 1938-3657
pISSN - 1071-0922
DOI - 10.1002/jsid.1011
Subject(s) - polarization (electrochemistry) , refractive index , materials science , wavelength , optics , grating , optoelectronics , liquid crystal , anisotropy , physics , chemistry
A polarization‐independent refractive index (RI) sensor with a sensitivity of 50 nm/RIU is demonstrated. The proposed RI sensor simply consists of a liquid crystal (LC) polymeric polarization grating film and one glass substrate. The wavelength shift over the RI of the surrounding medium is investigated through anisotropic rigorous coupled‐wave analysis. Such an LC‐based polarization‐independent RI sensor not only enables the usage of an unpolarized light source but also manifests a high sensitivity, offering great potential for the integration with display systems.