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TitleOptically switchable diffraction grating in a photochromic/polymer thin film
Publication TypeJournal Article
Year of Publication2015
AuthorsWilliams, G.V.M., Do M.T.T., Raymond S.G., Bhuiyan M.D.H., and Kay A.J.
JournalApplied Optics
Pagination6882 - 6886
Date Published2015
ISSN1559128X (ISSN)
KeywordsAdd/drop multiplexers, Amorphous films, Amorphous polycarbonates, Diffraction, Diffraction gratings, Optical switches, Photochromic dyes, Photochromism, Switchable, Thermal relaxation, Thin films, Ultra-violet light
AbstractAn optically switchable diffraction grating has been made in a thin film containing a photochromic dye and amorphous polycarbonate. We show that a film containing the dye 5-chloro-1,3-dihydro-1,3,3-trimethylspiro [2H-indole-2,30-(3H)naphth[2,1-b](1,4)oxazine] can be optically processed so that a diffraction grating can be completely switched on by ultraviolet light and turned off by thermal relaxation. The ability to switch or modulate the diffraction efficiency has a number of practical applications that include optical switches and add/drop multiplexers. © 2015 Optical Society of America.

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