The far-infrared absorption of a periodic 2DEG in the transition regime between weak and strong modulation

TL;DR

This paper investigates how the optical absorption of quantum dot and antidot arrays evolves under varying magnetic field conditions, revealing the behavior of collective magnetoplasmon modes in different modulation regimes.

Contribution

It introduces a quantum mechanical Hartree approximation approach to analyze the transition from weak to strong modulation in 2DEG systems and identifies associated collective modes.

Findings

Identification of magnetoplasmon modes across modulation regimes

Correlation of collective modes with system length scales

Insight into the evolution of absorption from homogeneous to strongly modulated systems

Abstract

We study the optical absorption of arrays of quantum dots and antidots in a perpendicular homogeneous magnetic field. The electronic system is described quantum mechanically using a Hartree approximation for the mutual Coulomb interaction of the electrons. The evolution of the absorption is traced from the homogeneous to the strongly modulated case identifying the ensuing collective modes, the magnetoplasmons, and their correlations with inherent length scales of the system.