Raman scattering from the upper and lower modes of surface phonon polaritons in ZnTe |
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Authors: | Jun-ichi Watanabe Tomoyuki Sekine Kunimitsu Uchinokura Etsuyuki Matsuura |
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Institution: | Institute of Physics, University of Tsukuba, Sakura-mura, Ibaraki 305, Japan |
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Abstract: | The upper and lower modes of surface phonon polaritons have been observed in free-standing thin slabs (~7 μm) of single-crystal ZnTe by a conventional Raman-scattering technique at room temperature. The experimental dispersion relations were measured in various scattering angles (outside the sample) from 0.9° to 2.0° and agree with the theoretical dispersion relations. The main factors enabling us to observe the two surface modes are the appropriate selections of the material with a small attenuation factor for surface phonon polaritons and of the thickness of the sample slabs. |
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