Decay rate and renormalized frequency shift of superradiant exciton in a cylindrical quantum wire

TL;DR

This paper investigates how the decay rate and frequency shift of superradiant excitons in cylindrical quantum wires vary with wire dimensions, revealing mode-dependent decay and the influence of angular momentum conservation.

Contribution

It provides a detailed analysis of decay rates and frequency shifts in cylindrical quantum wires, highlighting the mode dependence and the non-oscillatory behavior related to angular momentum.

Findings

Higher mode excitons have larger decay rates than lower modes.

Decay rate and frequency shift do not oscillate with wire radius due to angular momentum conservation.

Decay properties transition from 1D to 2D as wire dimensions change.

Abstract

The decay rate and renormalized frequency shift of superradiant exciton in a cylindrical quantum wire are studied. The transition behavior from 1D wire to 2D film is examined through the property of the radiative decay. Similar to the case in a quantum well, the decay rate of the higher mode exciton is larger than that of the lower mode one. Moreover, it is also found the decay rate and frequency shift do not show oscillatory dependence on wire radius because of the conservation of angular momentum.