Anisotropic Properties of Photon Drag Effect in p-type Germanium

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Abstract
A study on the anisotropy of the photon drag effect in p -type germanium confirms that the effect is adequately described by the fourth-rank photon drag tensor. The two independent components S and P of this tensor as functions of temperature and hole concentration have been determined. These values disagree with those obtained by Walker and Tilley [A. C. Walker and D. R. Tilley: J. Phys. C 4 (1971) L376]. The experimental results of the longitudinal and transverse photon drag fields are in good agreement with the description of the photon drag tensor. A computer analysis predicts that the maximum longitudinal photon drag effect occurs for a radiation with propagation along [110] and polarization along [\bar110], while the maximum transverse photon drag voltage appears in [11\bar3] when the radiation propagates along [332] with a [\bar110] polarization. Mechanisms for a transverse photon drag are discussed briefly.

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