Optical orientation of azo dye in polymer films at high pressure
JOSA B, Vol. 18, Issue 12, pp. 1854-1857 (2001)
http://dx.doi.org/10.1364/JOSAB.18.001854
Acrobat PDF (122 KB)
Abstract
We show that optically induced orientation by photoisomerization of a push–pull azobenzene chromophore flexibly tethered to a poly(methyl methacrylate) polymer is hindered by hydrostatic pressure. Pressure reduces the free volume and suppresses the photo-orientation of the chromophores in films of this polymer. We show that the quantum yield, ΦTC, of the trans→cis photoisomerization depends on the applied pressure, and a volume of (111±7) Å3 is measured for the activation of one-chromophore orientation by photoisomerization.
© 2001 Optical Society of America
[Optical Society of America ]
OCIS Codes
(160.5470) Materials : Polymers
(190.4710) Nonlinear optics : Optical nonlinearities in organic materials
(210.4810) Optical data storage : Optical storage-recording materials
(250.2080) Optoelectronics : Polymer active devices
(250.5460) Optoelectronics : Polymer waveguides
(260.1440) Physical optics : Birefringence
Citation
Zouheir Sekkat, Gerd Kleideiter, and Wolfgang Knoll, "Optical orientation of azo dye in polymer films at high pressure," J. Opt. Soc. Am. B 18, 1854-1857 (2001)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-18-12-1854
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