Inelastic light scattering and the off-resonance approximation

TL;DR

This paper investigates the validity of the off-resonance approximation in inelastic light scattering of a quantum dot, showing its limitations in accurately describing Raman processes for a 42-electron system.

Contribution

It provides detailed calculations of Raman intensities in a quantum dot to evaluate the applicability of the off-resonance approximation.

Findings

Final collective states do not always dominate Raman peaks.

The off-resonance approximation has limited applicability in certain conditions.

Results set bounds on the use of the off-resonance approximation in theoretical models.

Abstract

Inelastic (Raman) light scattering intensities for a 42-electron quantum dot under off-resonance conditions and in different spin and angular momentum channels are computed in order to test whether final collective states become the dominant peaks in the process. The results of the calculations set a limit to the spread use of the off-resonant approximation for the theoretical description of Raman processes.