Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/33400
Title: Photochromic effect and spatial light modulation in spiro-oxazine dye-doped polymeric films
Authors: Du, W
Tam, HY 
Keywords: Light sensitive material
Photochromic effect
Spatial light modulation
Issue Date: 1996
Publisher: North-Holland
Source: Optics communications, 1996, v. 126, no. 4-6, p. 223-229 How to cite?
Journal: Optics communications 
Abstract: A strong reversible photochromic phenomenon in spiro-oxazine (SO) dye-doped polyvinyl alcohol (PVA) films is reported. The absorption spectrum of the SO/PVA film shows an ultra-violet (UV) light induced isormerization process taking place between two molecular configurations, which correspond to the two characteristic absorption bands at 360 nm and 595 nm, respectively. The temporal behavior of this photo-isomerization process is investigated. The molecular absorption coefficients of SO1 to UV light and SO2 to the probe beam at 515 nm are found to be 1.2 cm2/J and 6 × 10-2 cm2/J, respectively. The life time of SO2 in the dark is about 38 s. Spatial light modulation and UV-to-visible image conversion using this photochromic film are demonstrated experimentally.
URI: http://hdl.handle.net/10397/33400
ISSN: 0030-4018
EISSN: 1873-0310
DOI: 10.1016/0030-4018(96)00004-1
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