Abstract

We demonstrate time-delay switches using the first-order dynamic diffraction light of two-beam coupled light with wavelengths of 632.8, 650, 532, and 488nm in a bacteriorhodopsin film. The optimal wavelengths are selected and the relationship between incident intensity and delay time is discussed. A switch delay time ranging from 3.52 to 12.5s is presented by the 632.8nm wavelength , while a delay time ranging from 1.24 to 10.6s is demonstrated by the 488nm wavelength . On the other hand, the wavelengths of 532 and 650nm are not suitable for time-delay switches due to the large variation of first-order diffraction intensity for lower incident intensities.

© 2009 Optical Society of America

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