B-M-type anisotropy in bacteriorhodopsin films for nonlinear spatial light modulation

Elena Y. Korchemskaya; Dmitriy A. Stepanchikov; Tatyana V. Dyukova; Valery Yu. Shakhbazian

doi:10.1117/12.474742

17 February 2003 B-M-type anisotropy in bacteriorhodopsin films for nonlinear spatial light modulation

Elena Y. Korchemskaya, Dmitriy A. Stepanchikov, Tatyana V. Dyukova, Valery Yu. Shakhbazian

Proceedings Volume 4833, Applications of Photonic Technology 5; (2003) https://doi.org/10.1117/12.474742
Event: Applications of Photonic Technology 5, 2002, Quebec City, Canada

Abstract

Bacteriorhodopsin (BR), a photoreceptor protein possesses a photochemical cycle of several distinct intermediates; all of them are photoactive. The BR molecules both in the initial form of the photocycle, BR570 (absorption maximum around 570 nm) and longest-lived (in films) intermediate M412 (absorption maximum at 412 nm) possess anisotropic absorption. Under the action of linearly polarized light, the reversible anisotropic photoselection of BR molecules takes place. So far only the method of photoinduced anisotropy based on anisotropic properties of BR570 was applied to realtime optical processing. In the present work, the potentialities for the use of photoinduced anisotropy in the BR-films based on both BR570 and M412 for the spatial light modulation are demonstrated. The overall blocking of highintensity features from an image is shown. Mixed B-M-type anisotropy in the chemically modified BR films, as applied to the edge enhancement, can provide a contrast ratio as high as 250:1. Low saturation intensity of the BR-films allows for the blocking of any intensity feature from an image that is carried out by choosing an appropriate intensity level of a controlling He-Ne laser beam without analyzer rotation. The photoanisotropic incoherent-to-coherent optical conversion with concurrent spatial-intensity modulation is also performed on the BR-films.

Citation Download Citation

Elena Y. Korchemskaya, Dmitriy A. Stepanchikov, Tatyana V. Dyukova, and Valery Yu. Shakhbazian "B-M-type anisotropy in bacteriorhodopsin films for nonlinear spatial light modulation", Proc. SPIE 4833, Applications of Photonic Technology 5, (17 February 2003); https://doi.org/10.1117/12.474742

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
10 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Anisotropy

Helium neon lasers

Modulation

Laser beam diagnostics

Absorption

Gaussian beams

Helium cadmium lasers

Show All Keywords

Keywords/Phrases

Search In:

Publication Years