Journal article
Synthesis and optical storage properties of a thiophene-based holographic recording
Risø National Laboratory for Sustainable Energy, Technical University of Denmark1
Laser Systems and Optical Materials, Optics and Plasma Research Department, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2
Optics and Plasma Research Department, Risø National Laboratory for Sustainable Energy, Technical University of Denmark3
The results of the fabrication and optical data storage characteristics of a novel azothiophene polyester 9 for potential holographic storage are reported. The polyester is derived from an azothiophene diol 1 and diphenyl phthalate 8 via in vacuo melt transesterification. Inclusion of a 5-methoxy-2-thienyl moiety generates a trans pi-pi* transition centered close to 405 nm.
An investigation of the optical data storage characteristics of a solution cast film of azopolyester with a thickness of 65 mm is summarised. The optical anisotropy induced by a 532 nm frequency doubled YAG laser and probed at a wavelength of 633 nm outside the absorption band with a polarimeter reveals a very high induced anisotropy of 7 rad ( laser intensity, 250 mW cm(-2)).
The calculated birefringence of the film is 0.02 per micron. Maximum anisotropy is reached after approximately 70 s of irradiation. The induced anisotropy disappears at approximately 90 degrees C. Room temperature stable gratings can be inscribed with high diffraction efficiency.
Language: | English |
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Publisher: | The Royal Society of Chemistry |
Year: | 2007 |
Pages: | 4477-4482 |
ISSN: | 13645501 and 09599428 |
Types: | Journal article |
DOI: | 10.1039/b705648f |