Bacteriorhodopsin modules for data processing with incoherent light

Incoherent optical processing with films made from the biological photochrome bacteriorhodopsin (BR) is accomplished by use of the photoinducible anisotropy of polymeric BR films. BR has two spectrally well separated states, B and M, both of which show a high degree of optical anisotropy. Whereas wi...

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Bibliographic Details
Published in:Optics letters 2002-09, Vol.27 (18), p.1607-1609
Main Authors: Juchem, T, Sanio, M, Hampp, N
Format: Article
Language:English
Subjects:
Anisotropy
Arrays
Charge coupled devices
Optical data processing
Refractive index
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Summary:Incoherent optical processing with films made from the biological photochrome bacteriorhodopsin (BR) is accomplished by use of the photoinducible anisotropy of polymeric BR films. BR has two spectrally well separated states, B and M, both of which show a high degree of optical anisotropy. Whereas with green and blue light the BR molecule can be switched between the two states, the accompanying changes in the refractive index may be nondestructively read out by wavelengths in the red, e.g., at 676nm. As the sensitivity of CCD arrays is quite high for such wavelengths, even low-power light sources are sufficient for detection. We describe a BR-based XOR computing module for incoherent optical data processing.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.27.001607