Ultrafast all-optical switching in bacteriorhodopsin

Sukhdev Roy; C. P. Singh; K. P. J. Reddy

doi:10.1117/12.424289

17 April 2001 Ultrafast all-optical switching in bacteriorhodopsin

Sukhdev Roy, C. P. Singh, K. P. J. Reddy

Proceedings Volume 4183, 24th International Congress on High-Speed Photography and Photonics; (2001) https://doi.org/10.1117/12.424289
Event: 24th International Congress on High-Speed Photography and Photonics, 2000, Sendai, Japan

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.

Citation Download Citation

Sukhdev Roy, C. P. Singh, and K. P. J. Reddy "Ultrafast all-optical switching in bacteriorhodopsin", Proc. SPIE 4183, 24th International Congress on High-Speed Photography and Photonics, (17 April 2001); https://doi.org/10.1117/12.424289

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