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

doi:10.1063/5.0044018

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

Department of Physics

University of Science and Technology of China

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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 language	English
Article number	114003
Journal	Applied Physics Letters
Volume	118
Issue number	11
Number of pages	10
ISSN	0003-6951
DOIs	https://doi.org/10.1063/5.0044018
Publication status	Published - 2021

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title = "Suppression of background emission for efficient single-photon generation in micropillar cavities",

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.",

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AU - Wang, Bi-Ying

AU - Häyrynen, Teppo

AU - Vannucci, Luca

AU - Jacobsen, Martin Arentoft

AU - Lu, Chao-Yang

AU - Gregersen, Niels

PY - 2021

Y1 - 2021

N2 - 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.

AB - 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.

U2 - 10.1063/5.0044018

DO - 10.1063/5.0044018

M3 - Journal article

SN - 0003-6951

VL - 118

JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 114003

ER -

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

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