Emission spectrum of quasi-resonant laterally coupled quantum dots
Miquel Royo, Juan Ignacio Climente, and Josep Planelles
TL;DR
This paper investigates how the emission spectrum of coupled quantum dots changes with interdot distance, revealing signatures of molecular coupling and differences in tunnel-coupling between excitons and trions.
Contribution
It provides a detailed calculation of emission spectra for neutral and charged excitons in coupled quantum dots, highlighting spectral signatures of coupling.
Findings
Emission spectrum changes with interdot distance.
Stronger tunnel-coupling of trions compared to neutral excitons.
Spectral signatures indicate molecular coupling.
Abstract
We calculate the emission spectrum of neutral and charged excitons in a pair of laterally coupled InGaAs quantum dots with nearly degenerate energy levels. As the interdot distance decreases, a number of changes take place in the emission spectrum which can be used as indications of molecular coupling. These signatures ensue from the stronger tunnel-coupling of trions as compared to that of neutral excitons.
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