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L‐6: Late‐News Paper : Achromatic Diffraction Using Reactive Mesogen Polarization Gratings
Author(s) -
Oh Chulwoo,
Escuti Michael J.
Publication year - 2007
Publication title -
sid symposium digest of technical papers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.351
H-Index - 44
eISSN - 2168-0159
pISSN - 0097-966X
DOI - 10.1889/1.2785576
Subject(s) - achromatic lens , mesogen , finite difference time domain method , optics , twist , polarization (electrochemistry) , grating , diffraction grating , diffraction , liquid crystal , materials science , physics , chemistry , geometry , mathematics , liquid crystalline
Abstract We propose and experimentally demonstrate an achromatic polarization grating, with ∼100% diffraction efficiency over nearly the entire visible spectral range. This five‐fold enhancement (∼34.3% versus ∼6.8%) is produced by two chiral liquid crystal layers with modest twist angle and opposite twist sense. Finite‐difference time‐domain (FDTD) simulations support the experimental phenomena.