Abstract

Spatial light modulation by use of a biphotonic holographic grating has been demonstrated in an azobenzene-doped polymer film. The mechanism of incoherent-to-coherent optical conversion originates from the photoinduced transcis isomerization of azobenzene molecules by two color lights. It is also found that when the intensity of the blue beam is varied the output replica of the input information changes sign.

© 1999 Optical Society of America

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References

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P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

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E. J. Sharp, G. L. Wood, W. W. Clark, G. J. Salamo, and R. R. Neurgaonkar, Opt. Lett. 17, 203 (1992).
[CrossRef]

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1983 (1)

Birge, R. R.

Blumer, R.

Chang, M.-W.

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P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

Chen, Z.

Clark, W. W.

E. J. Sharp, G. L. Wood, W. W. Clark, G. J. Salamo, and R. R. Neurgaonkar, Opt. Lett. 17, 203 (1992).
[CrossRef]

Friesem, A. A.

Gong, X.

P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

Gross, R. B.

Günter, P.

Hsu, K. Y.

Huang, W.

P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

Krongauz, V. A.

Marrakchi, A.

Neurgaonkar, R. R.

E. J. Sharp, G. L. Wood, W. W. Clark, G. J. Salamo, and R. R. Neurgaonkar, Opt. Lett. 17, 203 (1992).
[CrossRef]

Psaltis, D.

Salamo, G. J.

E. J. Sharp, G. L. Wood, W. W. Clark, G. J. Salamo, and R. R. Neurgaonkar, Opt. Lett. 17, 203 (1992).
[CrossRef]

Sharp, E. J.

E. J. Sharp, G. L. Wood, W. W. Clark, G. J. Salamo, and R. R. Neurgaonkar, Opt. Lett. 17, 203 (1992).
[CrossRef]

Shi, Y.

Song, Q. W.

Sun, C.-C.

Tang, G.

P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

Tanguay, A. R.

Voit, E.

Wang, L.

P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

Weiss, V.

Wood, G. L.

E. J. Sharp, G. L. Wood, W. W. Clark, G. J. Salamo, and R. R. Neurgaonkar, Opt. Lett. 17, 203 (1992).
[CrossRef]

Wu, P.

P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

Xu, J.

P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

Zhang, C.

Zhang, G.

P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

Zou, B.

P. Wu, L. Wang, J. Xu, B. Zou, X. Gong, G. Zhang, G. Tang, W. Chen, and W. Huang, Phys. Rev. B 57, 3874 (1998).
[CrossRef]

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Figures (4)

Fig. 1
Fig. 1

Display of diffraction efficiencies of a biphotonic holograph as a function of 442-nm light intensity. Circles, steady-state values when both the blue and the red lights are on; triangles, peak values when the blue light is blocked; solid curves, theoretical best fit of the experimental results.

Fig. 2
Fig. 2

Experimental arrangement of incoherent-to-coherent conversion with biphotonic holography: W, white-light source; F, bandpass filter; G, matte glass; M, mask; L1, L2, lenses; S, sample, Ia, Ib, coherent beams; I1, incoherent light.

Fig. 3
Fig. 3

Image readouts of incoherent-to-coherent conversion: (a) input image, (b) coherent replica when the coherent and the incoherent lights are turned on, (c) coherent replica after the incoherent light is turned off.

Fig. 4
Fig. 4

Image readout changes: (a), (b) weak blue beam (intensity 0.12 mW/cm2); (c), (d) strong blue beam (intensity 24 mW/cm2). (a), (c) Both the blue and the red beams are turned on; (b), (d) the blue beam is blocked.

Equations (2)

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Gs=A1I1A2I2N01+A1I1+A2I22,
Gp=A1I1A2I2N01+A1I1+A2I21+A2I2×exp-A1I11+A1I1+A2I2.

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