Studies of magnetogyration in cubic Bi12GeO20 crystals using small-angular magnetooptic polarimetry

TL;DR

This study investigates the magnetogyration effect in Bi12GeO20 crystals using small-angular magnetooptic polarimetry, revealing the significant influence of multiple reflections on measurement accuracy.

Contribution

The paper demonstrates that small-angular polarimetric mapping provides comparable results to single-ray methods and highlights the impact of multiple reflections on MG measurements.

Findings

MG rotation magnitude is consistent across methods.

Multiple reflections cause measurement errors at least twice the MG rotation.

Small-angular mapping effectively studies MG in Bi12GeO20.

Abstract

We present the results of studies for magnetogyration (MG) effect in non-centro-symmetric, non-polar Bi12GeO20 crystals performed with the small-angular polarimetric mapping technique. The magnitude of MG rotation obtained with the small-angular mapping is close to the corresponding values obtained recently on the basis of single-ray polarimetry. Our results demonstrate that multiple reflections of light play a key role in the studies of MG effect in Bi12GeO20 crystals. They lead to the error, which is at least two times as large as the expected value of the MG rotation.