Polarization-Independent Liquid-Crystal Grating with Microscale Alignment Pattern

Michinori HONMA  Masanori OGASAWARA  Toshiaki NOSE  

IEICE TRANSACTIONS on Electronics   Vol.E88-C   No.11   pp.2099-2105
Publication Date: 2005/11/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.11.2099
Print ISSN: 0916-8516
Type of Manuscript: INVITED PAPER (Special Section on Electronic Displays)
liquid crystal,  liquid crystal grating,  blazed grating,  beam steerer,  microrubbing,  

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A polarization-independent liquid crystal (LC) grating with a microscale LC molecular alignment pattern is proposed. The microscale LC alignment pattern is achieved using a microrubbing technique. The optical properties of the proposed LC grating are theoretically discussed in detail using Jones matrix method. Optimum condition for obtaining maximum +1st or -1st diffraction efficiencies is derived. The diffraction efficiency of the LC grating is measured and the diffraction efficiency characteristics are compared with the theoretical result. Furthermore, the dependence of the polarization direction of the incident light on the diffraction efficiency is discussed.