Effective photochromic nonlinearity of dried blue-membrane bacteriorhodopsin films

Jack Tallent, Q. Wang Song, Zengfa Li, Jeff Stuart, R. R. Birge

Research output: Contribution to journalArticlepeer-review

22 Scopus citations


We report the effective nonlinearity for photochromic conversion in a blue-membrane bacteriorhodopsin film hosted in a dry polyvinyl alcohol matrix. The shift in absorption maximum on photoconversion in this film is larger than that of the same material in hydrated form, thus offering a larger modulation of the refractive index. The photoexcited index modulation is stable for several months, which provides for holographic data recording and long-term photochromic data storage. The effective index modulation is experimentally measured and is in good agreement with the theoretical predictions based on the Kramers-Kronig transformation.

Original languageEnglish (US)
Pages (from-to)1339-1341
Number of pages3
JournalOptics Letters
Issue number17
StatePublished - Oct 1 1996

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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