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Title: High-contrast, all-optical switching in bacteriorhodopsin films
Authors: Banyal, R. K
Prasad, B. R
Keywords: Fiber optics and optical communications : Buffers;Couplers;Routers;Switches;Multiplexers;Nonlinear optics : Nonlinear optics;Optical devices : All-optical devices;Thin films : Thin films;Optical properties
Issue Date: Sep-2005
Publisher: Optical Society of America
Citation: Applied Optics, Vol. 44, No. 26, pp. 5497 - 5503
Abstract: We report experiments with nonlinear-absorption-based, high-contrast, all-optical switching in photochromic bacteriorhodopsin (BR) films. The switching action is accomplished by control of the transmission of a weak probe beam through a BR sample with the help of strong pump beam illumination at 532 nm wavelength. We found that the switching properties of BR films depend on several experimentally controllable parameters such as probe wavelength, pump beam intensity, and excitation rate. A comparative study of the switching behavior and other parameters of practical use was carried out at three probe wavelengths (543, 594, and 633 nm) and various beam powers and pump excitation rates. The results are presented for commercially available wild-type and D96N variant BR films.
Description: Restricted Access
ISSN: 0003-6935
Appears in Collections:IIAP Publications

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