Ukrainian Journal of Physical Optics 

Number  4, Volume 7,  2006

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Visualization of Space-Charge Waves in Photorefractive Semiconductor Using Polarimetric Technique
1Shcherbin K., 1Danylyuk V., 2Khomenko A.

1Institute of Physics of NAS, 46 Prospekt Nauki, 03650 Kiev, Ukraine
2Centro de Investigación Científica y de Educación Superior de Ensenada, Km. 107 Carretera Tijuana-Ensenada, Ensenada, B.C. 22860, México

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We suggest visualizing space-charge waves (SCW) in the near field in homogeneously illuminated photorefractive crystal, using modulation of optical polarization induced by the SCW due to the Pockels effect. Spatial distribution of SCW is obtained in the near field for a photorefractive semiconductor placed between polarizers. It is shown that the internal field in the crystal is not homogeneous, the SCW at different points are excited with different amplitudes and their structure is not perfectly regular. Qualitative agreement of existing theoretical model with our experimental data is demonstrated. Using the model, the mobility-lifetime product for the free carriers and the effective trap concentration are estimated.

Keywords: space-charge waves, photorefraction, cadmium telluride

PACS: 42.65.Hw; 42.70.Nq; 52.35.Mw; 72.80.Ey

doi 10.3116/16091833/7/4/164/2006

1. Kazarinov R F, Suris RA and Fuks BI, 1973. Sov. Phys. Semicond. 7: 102.
2. Sturman B, Bledowski A, Otten J and Ringhofer K, 1993. J. Opt. Soc. Am. B 10: 1919.
3. Sturman BI, 2006. Space-charge wave effects in photorefractive materials. In “Photorefractive materials and their applications I”. New York, Springer Science + Business Media, Inc.
4. Huignard J P and Marrakchi A, 1981. Opt. Commun. 38: 249.
5. Stepanov SI and Petrov MP, 1985. Opt. Commun. 53: 292.
6. Petrov MP, Paugurt AP, Bryksin VV, Wevering S and Krätzig E, 2000. Phys. Rev. Lett. 84: 5114.
7. Petrov MP, Stepanov SI and Khomenko AV, 1991. Photorefractive crystals in coherent optical systems. Berlin, Springer-Verlag.
8. Shcherbin K, 2000. Appl. Phys. B 71: 123.
9. Yariv A and Yeh P, 1984. Optical waves in crystals. New York, Wiley.
10. Tada K and Aoki M, 1971. Jpn. J. Appl. Phys. 10: 998.
11. Ziari M and Steier WH, 2002. Appl. Opt. 32: 5711.

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