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Polarized Raman Scattering Study of ZnGeP2 Single Crystals

Published online by Cambridge University Press:  10 February 2011

Spirit Tlali
Affiliation:
Department of Physics, University of Cincinnati, Cincinnati OH 45221-0011
Howard E. Jackson
Affiliation:
Department of Physics, University of Cincinnati, Cincinnati OH 45221-0011
M. C. Ohmer
Affiliation:
Wright Laboratory, Wright-Patterson AFB, OH 45433
P. G. Schunemann
Affiliation:
Lockheed Sanders, Nashua, NH 03061
T. M. Pollak
Affiliation:
Lockheed Sanders, Nashua, NH 03061
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Abstract

Raman scattering experiments on high quality ZnGeP2 single crystals grown by the seeded horizontal dynamic gradient technique have been carried out. Polarized Raman spectra were obtained in the backscattering geometry at both room and low temperatures for several crystal orientations and compared with group theoretical predictions. Raman spectra from as-grown and annealed samples display distinctive differences which were explored by utilizing two different excitation wavelengths: 514.3 nm and 632.8 nm; the observed differences are attributed to a surface interdiffuasion effect.

Type
Research Article
Copyright
Copyright © Materials Research Society 1998

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References

1. See, for instance, Bundi, P. A., Ezzo, K., Schunemann, P. G., Minnigh, S., McCarthy, J. C., and Pollak, T. M., in OSA Proceedings on Advanced Solid State Lasers, ed. Dube, G. and Chase, L. L., 10, 335 (1993).Google Scholar
2. See, for instance, Schunemann, P. G., Budni, P. A., Knights, M. G., Pollak, T. M., Chicklis, E. P., and Marquardt, C. L., in OSA Proceedings on Advanced Solid State Lasers, ed. Pinto, A. A. and Fan, T. Y., 15, 166 (1993).Google Scholar
3. Marquardt, C. L., Cooper, D. G., Budni, P. A., Knights, M. G., Schepler, K. L., DeDomenico, R., and Catella, G. C., Appl. Opt. 33, 3192 (1994).CrossRefGoogle Scholar
4. Roelofs, M. G., J. Appl. Phys., 65, 4976 (1989).CrossRefGoogle Scholar
5. Andreev, Y. M. et al., Sov. J. Quant, Elect. 14, 1022 (1984).Google Scholar
6. Shunemann, P. G. and Pollak, T. M., in OSA Proceedings on Advanced Solid State Lasers, ed. Dube, G. and Chase, L. L., 10, 332 (1991).Google Scholar
7. For a complete version of these experiments, including low temperature results and a symmetry analysis of the Raman response, see Tlali, S., Jackson, H. E.. Ohmer, M. C., Schunemann, P. G., and Pollak, T. M., to be published.Google Scholar

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