Elastic Light Scattering by Semiconductor Quantum Dots

TL;DR

This paper provides a theoretical analysis of elastic light scattering by semiconductor quantum dots, showing that under certain conditions, the scattering characteristics are independent of quantum dot size and shape, with specific calculations of cross sections and radiative broadenings.

Contribution

It introduces a theoretical model for resonant light scattering in quantum dots, revealing size-independent scattering properties and calculating radiative broadenings.

Findings

Scattering cross section is about the square of the wavelength.

Polarization and angular distribution are size-independent when wavelength exceeds quantum dot size.

Resonant scattering cross section depends on exciton radiative broadening.

Abstract

Elastic light scattering by low-dimensional semiconductor objects is investigated theoretically. The differential cross section of resonant light scattering on excitons in quantum dots is calculated. The polarization and angular distribution of scattered light do not depend on the quantum-dot form, sizes and potential configuration if light wave lengths exceed considerably the quantum-dot size. In this case the magnitude of the total light scattering cross section does not depend on quantum-dot sizes. The resonant total light scattering cross section is about a square of light wave length if the exciton radiative broadening exceeds the nonradiative broadening. Radiative broadenings are calculated.