Improved measurement of polarization state in terahertz polarization spectroscopy

TL;DR

This paper introduces a calibration method that enhances the accuracy of polarization measurements in terahertz spectroscopy by correcting detector non-idealities, achieving sub-degree precision and significantly reducing errors.

Contribution

A novel calibration scheme for terahertz photoconductive detectors that improves polarization measurement accuracy by compensating for detector non-idealities.

Findings

Achieved sub-degree angular accuracy in polarization measurements.

Reduced measurement errors by at least 60%.

Validated the calibration scheme through experimental results.

Abstract

A calibration scheme is presented for improved polarization state measurement of terahertz pulses. In this scheme the polarization response of a two-contact terahertz photoconductive detector is accurately measured, and is used to correct for the impact of the non-idealities of the detector. Experimental results show excellent sub-degree angular accuracy and at least 60% error reduction with this scheme.