Magnetic-field-induced fourfold azimuthal angle dependence in the terahertz radiation power of (100) InAs

College

College of Science

Department/Unit

Physics

Document Type

Article

Source Title

Applied Physics Letters

Volume

90

Issue

15

Publication Date

4-24-2007

Abstract

The azimuthal angle dependence in the terahertz radiation power of (100) InAs under 1 T magnetic field is presented. Results show that although the dominant radiation mechanism is surge current, azimuthal-angle-dependent radiation due to the nonlinear effect is also observed. The twofold symmetry of the p-polarized terahertz radiation power was modified to a fourfold symmetry with the transverse magnetic field. Moreover, results exhibited fourfold symmetry for the s-polarized terahertz power even with no applied field. The anisotropic intervalley scattering of photocarriers is tentatively proposed as the origin of quadrupole response and the fourfold emission symmetry. © 2007 American Institute of Physics.

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Digitial Object Identifier (DOI)

10.1063/1.2721385

Disciplines

Physics

Keywords

Submillimeter waves

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