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Wavelength Dependence of the Photorefractive and Photodiffractive Properties of Holographic Thin Films Based on Bacteriorhodopsin

Published online by Cambridge University Press:  15 February 2011

Robert R. Birge ,
K. Can Izgi ,
Jeffrey A. Stuart  and
Jack R. Tallent
Robert R. Birge
Affiliation:
Department of Chemistry and Center for Molecular Electronics, Syracuse University, Syracuse, New York 13244–4100
K. Can Izgi
Affiliation:
Department of Chemistry and Center for Molecular Electronics, Syracuse University, Syracuse, New York 13244–4100
Jeffrey A. Stuart
Affiliation:
Department of Chemistry and Center for Molecular Electronics, Syracuse University, Syracuse, New York 13244–4100
Jack R. Tallent
Affiliation:
Department of Chemistry and Center for Molecular Electronics, Syracuse University, Syracuse, New York 13244–4100
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Abstract

The photorefractive and photodiffractive properties of a 2 × 10−3 M, 30μim thin film of bacteriorhodopsin at - 40°C are analyzed by using optical absorption spectroscopy, the Kramers- Kronig transformation and coupled wave theory. Conversion of M to bR generates a dispersion in the refractive index that has a broad negative band from 450 to 540 nm [Δn500nm - -0.0016] and a broad positive band from 590 to 700 nm [Δn605nm - 0.0016]. The large change in refractive index for moderate solute concentration is due to the formation of the protonated Schiff base chromophore in bR which generates a large red shift in the absorption spectrum as well as a large increase in oscillator strength. The integrated diffraction efficiency from 300 - 800nm is dominated by refractive index contributions (ηphase) which are maximum in regions of minimal bR and M absorption. The maximum in the refractive (phase) component occurs at 451 nm (ηphase - 9.7%) whereas the maximum in the absorption component occurs at 575 nm (ηabs - 2.2%). The maximum efficiency of diffraction is observed at ∼440 nm (ηtotal - 10.7%). Adequate diffractive performance for most applications is predicted for write wavelengths in the regions 380 - 420 & 500 - 650 nm and for read wavelengths from 380 to 740 nm.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 218: Symposium V – Materials Synthesis Based on Biological Processes , 1990 , 131
Copyright
Copyright © Materials Research Society 1991

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References

REFERENCES

1. Birge, R.R., Biochim. Biophys. Acta 1016, 293 (1990).CrossRefGoogle Scholar
2. Birge, R.R., Annu. Rev. Phys. Chem. 41, 683 (1990).CrossRefGoogle Scholar
3. Hampp, N., Bräuchle, C. and Oesterhelt, D., Biophys. J. 58, 83 (1990).CrossRefGoogle Scholar
4. Bazhenov, V.Y., Soskin, M.S. and Taranenko, V.B., Sov. Tech. Phys. Lett. 13, 382 (1987).Google Scholar
5. Bazhenov, V.Y., Soskin, M.S., Taranenko, V.B. and Vasnetsov, M.V. in Optical processing and computing, edited by. Arsenault, H.H., Szoplik, T. and Macukow, B., (Academic, New York, 1989) pp. 103–144.CrossRefGoogle Scholar
6. Birge, R.R., Fleitz, P.A., Gross, R.B., Izgi, J.C., Lawrence, A.F., Stuart, J.A. and Tallent, J.R., Proc. IEEE, Medicine and Biology 12, 1788 (1990).Google Scholar
7. Bunkin, F.V., Vsevolodov, N.N., Druzhko, A.B., Mitsner, B.I., Prokhorov, A.M., Savranskii, V.V., Tkachenko, N.W. and Shevchenko, T.B., Sov. Tech. Phys. Lett. 7, 630 (1981).Google Scholar
8. Vsevolodov, N.N. and Poltoratskii, V.A., Sov. Phys. Tech. Phys. 30, 1235 (1985).Google Scholar
9. Govindjee, R., Balashov, S.P. and Ebrey, T.G., Biophys. J. 58, 597 (1990).CrossRefGoogle Scholar
10. Landau, L.D. and Lifshitz, E.M., Electrodynamics of Continuous Media, (Pergamon, New York, 1960).Google Scholar
11. Loudon, R., The Quantum Theory of Light, (Clarendon, Oxford, 1973).Google Scholar
12. Townes, C.H. and Schawlow, A.L., Microwave Spectroscopy, (Dover, New York, 1975).Google Scholar
13. Kogelnick, H.. Bell Syst. Tech. J. 48, 2909 (1969).CrossRefGoogle Scholar