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Polarized Raman Scattering Study of ZnGeP2 Single Crystals

  • Spirit Tlali (a1), Howard E. Jackson (a1), M. C. Ohmer (a2), P. G. Schunemann (a3) and T. M. Pollak (a3)...

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.

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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).
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).
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).
4. Roelofs, M. G., J. Appl. Phys., 65, 4976 (1989).
5. Andreev, Y. M. et al., Sov. J. Quant, Elect. 14, 1022 (1984).
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).
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.
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MRS Online Proceedings Library (OPL)
  • ISSN: -
  • EISSN: 1946-4274
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