Abstract
Photon-biased modulator was the novel photon device model based on the complementarily modulated transmission of biological photochrome bacteriorhodopsin (BR) film. BR has two dominant photoactive states during the photocycle, B and M, which have well-separated absorption bands with maxima at 568 nm and 412 nm. The local transmission of a BR film depends on the ratio between the forward and the backward rate constants of photoreactions. The modulatable saturated absorption of chemically enhanced BR film under multi-beam illumination was studied. The theoretical analysis indicated that there exists the threshold intensity for the BR film simultaneously illuminated by two beams at 568 nm and 412 nm. Around threshold intensity, the transmissions of two beams are complementarily modulated. As one of the useful photon device application of photon transistor, new method of incoherent distortionless bright background removal in image processing was presented.© (1998) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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