Polarization dependences of terahertz radiation emitted by hot charge carriers in p-Te

TL;DR

This paper investigates how the polarization of terahertz radiation emitted by hot charge carriers in p-Te depends on the crystal's anisotropic properties, combining theoretical analysis and experimental validation.

Contribution

It provides a detailed analysis of the polarization dependence of terahertz emission in p-Te, highlighting the role of anisotropic dispersion and dielectric permittivity.

Findings

Polarization dependences are periodic and linked to the crystal orientation.

Angular emission patterns are influenced by anisotropic dispersion law.

Experimental results confirm theoretical predictions.

Abstract

Polarization dependences of the terahertz radiation emitted by hot charge carriers in p-Te have been studied both theoretically and experimentally. The angular dependences of the spontaneous radiation emission by hot carriers is shown to originate from the anisotropy of their dispersion law and the anisotropy of the dielectric permittivity of a tellurium crystal. We have shown that the polarization dependences of radiation are determined by the angle between the crystallographic axis C3 in p-Te and the polarization vector; they are found to have a periodic character.