Title |
Optical Modulation of the Diffraction Efficiency in an Indoline Azobenzene/Amorphous Polycarbonate Film
|
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Published in |
Discover Nano, July 2016
|
DOI | 10.1186/s11671-016-1542-2 |
Pubmed ID | |
Authors |
G. V. M. Williams, My T. T. Do, A. Middleton, S. G. Raymond, M. D. H. Bhuiyan, A. J. Kay |
Abstract |
We have made a diffraction grating in an indoline azobenzene/amorphous polycarbonate film by two-beam interference at 532 nm that periodically photodegrades the indoline azobenzene dye. Subsequent illumination of the film with 532-nm light into the trans-isomer band leads to trans-cis isomerization in the indoline azobenzene dye and results in a decrease in the trans-isomer band absorption coefficient. This causes the diffraction efficiency to decrease when probed at 655 nm. The diffraction efficiency returns to its original value when the 532-nm light is blocked by thermal relaxation from the indoline azobenzene cis-isomer to the trans-isomer. Thus, we have been able to optically modulate the diffraction efficiency in a thin film diffraction grating. |
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