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Proceedings Paper

Ultrafast all-optical switching in bacteriorhodopsin
Author(s): Sukhdev Roy; C. P. Singh; K. P. J. Reddy
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Paper Abstract

All-optical switching has been demonstrated in bacteriorhodopsin based on excited-state nonlinear absorption. A probe laser beam at 640 nm corresponding to the O-state absorption maximum is switched due to a strong pulsed pump laser beam at 570 nm, that corresponds to the maximum ground state absorption. We have studied the effect of variation in pulse width and in small signal absorption coefficient on the switching characteristics. The switching time decreases as the pulse width of the pump beam decreases and the small signal absorption coefficient increases. The switching contrast depends mainly on the peak pumping intensity.

Paper Details

Date Published: 17 April 2001
PDF: 5 pages
Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); doi: 10.1117/12.424289
Show Author Affiliations
Sukhdev Roy, Dayalbagh Educational Institute (India)
C. P. Singh, Dayalbagh Educational Institute (India)
K. P. J. Reddy, Indian Institute of Science (United States)


Published in SPIE Proceedings Vol. 4183:
24th International Congress on High-Speed Photography and Photonics
Kazuyoshi Takayama; Tsutomo Saito; Harald Kleine; Eugene V. Timofeev, Editor(s)

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