Long holographic lifetimes in bacteriorhodopsin films

Autor:	Daniel Tod Smithey, Marshall David Crew, Doǧan A. Timuçin, John D. Downie
Rok vydání:	1998
Předmět:	Diffraction Molecular diffusion 3D optical data storage Materials science biology business.industry Bacteriorhodopsin Grating Diffraction efficiency Atomic and Molecular Physics and Optics Photochromism Optics biology.protein Optoelectronics Thin film business
Zdroj:	Optics Letters. 23:730
ISSN:	1539-4794 0146-9592
DOI:	10.1364/ol.23.000730
Popis:	The D85N genetic variant of bacteriorhodopsin displays a nearly permanent lifetime of the photochromic P490 state. We present pump-probe measurements that demonstrate this behavior. However, experimental diffraction efficiency measurements made from holograms recorded in a hydrated D85N film show markedly different decay behavior, suggesting a molecular diffusion process occurring in the film. Holograms recorded with different grating frequencies display correspondingly different decay times which support this hypothesis. A thin D85N film was then fabricated which was chemically crosslinked, resulting in the elimination of diffusion of BR molecules within the polymer matrix. This film exhibits a grating lifetime on the order of weeks or more, thus allowing the long term holographic storage of information in a BR film.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1bcf357bb606489db41925e40662a348 https://doi.org/10.1364/ol.23.000730 Zobrazit plný text záznamu