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  • Vol. 16, Iss. 9 — May. 1, 1991
  • pp: 651–653

Bacteriorhodopsin films as spatial light modulators for nonlinear-optical filtering

R. Thoma, N. Hampp, C. Bräuchle, and D. Oesterhelt  »View Author Affiliations


Optics Letters, Vol. 16, Issue 9, pp. 651-653 (1991)
http://dx.doi.org/10.1364/OL.16.000651


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Abstract

The application of dry purple membrane films for nonlinear-optical filtering is described. The biological photo-chrome bacteriorhodopsin (BR) is contained in the purple membrane (PM) from Halobacterium halobium. BR has two dominant photoactive states, B and M, which have well-separated absorption bands with maxima at 570 nm (B) and 412 nm (M). Since the local transmission of a PM film depends on the ratio between the forward (B → M) and the backward (M → B) photoreactions, PM films can be used as light-controlled absorptive spatial light modulators. A model describing the nonlinear transmission of PM films containing the wild-type form of BR or one of its mutated variants, e.g., BRD96N, and examples of their application in spatial filtering, e.g., edge enhancement, are presented.

© 1991 Optical Society of America

History
Original Manuscript: December 3, 1990
Published: May 1, 1991

Citation
R. Thoma, D. Oesterhelt, N. Hampp, and C. Bräuchle, "Bacteriorhodopsin films as spatial light modulators for nonlinear-optical filtering," Opt. Lett. 16, 651-653 (1991)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-16-9-651


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