Document Type
Article
Publication Date
7-31-1995
Abstract
We report a convenient method to obtain all‐optical light modulation in bacteriorhodopsin films using a degenerate four‐wave mixing geometry. Chemically stabilized films of bacteriorhodopsin in a polymer matrix for which the lifetime of the excited M state is tens of seconds were used to demonstrate all‐optical light intensity modulation. The films are observed to be stable over a period of 4 years. Due to the sensitivity of the films, small intensities of order microwatt/ cm2 are required in the modulation experiments. Furthermore the fast photochemical transition from M to B permit reasonably fast modulation speeds independent of the slow thermal M and B relaxation time. The experimental system also acts as an all‐optical switch where a low power blue pulse turns on a signal red beam.
Recommended Citation
Aranda, F. J.; Garimella, R.; McCarthy, N. F.; Rao, D. Narayana; Rao, D.V.G.L.N.; Chen, Z.; Akkar, J. A.; and Kaplan, D. L., "All‐optical light modulation in bacteriorhodopsin films" (1995). Physics Faculty Publications. 31.
https://scholarworks.umb.edu/physics_faculty_pubs/31
Publisher
American Institute of Physics
Rights
Copyright 1995 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Comments
The following article appeared in Applied Physics Letters, vol. 67, issue 5 (1995) and may be found at http://dx.doi.org/10.1063/1.115401.
Copyright 1995 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.