Suppression of background emission for efficient single-photon generation in micropillar cavities

Bi-Ying Wang, Teppo Häyrynen, Luca Vannucci, Martin Arentoft Jacobsen, Chao-Yang Lu, Niels Gregersen*

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

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Abstract

We optimize the efficiency of a quantum-dot-based micropillar single-photon source by minimizing the spontaneous emission into unwanted background modes. We perform a numerical investigation of the background emission, where we identify a semi-periodic enhancement with the diameter. At these peaks of the background emission, the efficiency is reduced by ∼20%, and we show how this reduction can be avoided simply by choosing a diameter away from the peaks. Finally, we analyze the discrepancy between the Purcell factor estimated from experimental lifetime measurements and the true Purcell factor.
Original languageEnglish
Article number114003
JournalApplied Physics Letters
Volume118
Issue number11
Number of pages10
ISSN0003-6951
DOIs
Publication statusPublished - 2021

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