Polariton Emission Characteristics of a Modulation-Doped Multiquantum-Well Microcavity Diode
Ayan Das, Bo Xiao, Sishir Bhowmick, Pallab Bhattacharya
TL;DR
This study investigates how polariton-electron scattering affects the emission properties of a modulation-doped GaAs quantum well microcavity diode, revealing suppression of relaxation bottlenecks but no formation of a coherent condensate.
Contribution
It provides new insights into the impact of electron doping on polariton dynamics and emission in microcavity diodes under strong coupling.
Findings
Polariton-electron scattering suppresses the relaxation bottleneck.
No degenerate coherent condensate is produced at k|| ~ 0.
Coherent emission is not achieved despite scattering effects.
Abstract
The role of polariton-electron scattering on the performance characteristics of an electrically injected GaAs-based quantum well microcavity diode in the strong coupling regime has been investigated. An electron gas is introduced in the quantum wells by modulation doping with silicon dopants. It is observed that polariton-electron scattering suppresses the relaxation bottleneck in the lower polariton branch. However, it is not adequate to produce a degenerate coherent condensate at k|| ~ 0 and coherent emission.
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