Modification of Selection Rules of Landau-Quantized Electron by Coupling with Obliquely Irradiated Optical Vortex Beams

TL;DR

This paper investigates how obliquely incident optical vortex beams alter the selection rules and photocurrent responses of Landau-quantized electrons in a 2D electron gas under strong magnetic fields, revealing modified angular momentum interactions.

Contribution

It introduces a new understanding of how oblique irradiation affects the angular momentum selection rules and photocurrent in Landau-quantized systems, expanding on previous vertical incidence studies.

Findings

Selection rules are modified by oblique incidence.

Photocurrent intensities depend on the superposition of orbital angular momentum states.

Angular deflection influences the electron-photon interaction dynamics.

Abstract

We discuss selection rules and intensities of photocurrent of a two-dimensional electron gas in a strong magnetic field via absorptions of orbital angular momentum carried by obliquely irradiated optical vortex beams. By angular deflection, optical vortex beams on the two-dimensional electron gas interface can be seen as a superposition of the various orbital angular momentum states. As a result, it is demonstrated that it is yielded that the angular momentum selection rules and induced currents are modified from the case of vertical incidence.