Interband electron Raman scattering in a quantum wire in a transverse magnetic field

TL;DR

This paper investigates electron Raman scattering in a quantum wire under a transverse magnetic field, analyzing spectral features, selection rules, and resonance effects with numerical results for GaAs/AlGaAs structures.

Contribution

It provides a detailed theoretical analysis of interband electron Raman scattering in quantum wires with magnetic fields, including spectral features and resonance conditions.

Findings

Identification of density-of-states peaks in spectra

Discovery of singularities and resonance effects

Numerical results for GaAs/AlGaAs quantum wires

Abstract

Electron Raman scattering (ERS) is investigated in a parabolic semiconductor quantum wire in a transverse magnetic field neglecting by phonon-assisted transitions. The ERS cross-section is calculated as a function of a frequency shift and magnetic field. The process involves an interband electronic transition and an intraband transition between quantized subbands. We analyze the differential cross-section for different scattering configurations. We study selection rules for the processes. Some singularities in the Raman spectra are found and interpreted. The scattering spectrum shows density-of-states peaks and interband matrix elements maximums and a strong resonance when scattered frequency equals to the "hybrid" frequency or confinement frequency depending on the light polarization. Numerical results are presented for a GaAs/AlGaAs quantum wire.