Composed Effects of Electron-Hole Exchange and Near-Field Interaction in Quantum-Dot-Confined Radiative Dipoles

Jaime David Díaz-Ramírez, Shiang Yu Huang, Bo Long Cheng, Ping Yuan Lo, Shun Jen Cheng*, Hanz Yecid Ramírez-Gómez*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

Conservation of polarization is an important requirement for reliable single-photon emitters, which, in turn, are essential building blocks for light-based quantum information processing. In this work, we study the exciton-spin dynamics in a double quantum dot under the combined effects of electron-hole exchange and Förster resonance energy transfer. By means of numerical solutions of the quantum master equation, we simulate the time-dependent spin polarization for two neighboring dots. According to our results, under some conditions, the depolarization caused by the electron-hole exchange may be slowed by the near field-induced interdot energy transfer, suggesting a new mechanism to extend the exciton coherence time. This opens doors to alternative schemes for improved solid-state quantum light sources.

Original languageEnglish
Article number84
JournalCondensed Matter
Volume8
Issue number3
DOIs
StatePublished - Sep 2023

Keywords

  • decoherence
  • dipole-dipole interaction
  • electron-hole exchange
  • fine structure splitting
  • Förster resonance energy transfer
  • polarized emission
  • quantum dots

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