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

Bi-Ying Wang | Zendy; Teppo Häyrynen | Zendy; Luca Vannucci | Zendy; Martin Arentoft Jacobsen | Zendy; ChaoYang Lu | Zendy; Niels Gregersen | Zendy

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

Author(s) -

Bi-Ying Wang,

Teppo Häyrynen,

Luca Vannucci,

Martin Arentoft Jacobsen,

ChaoYang Lu,

Niels Gregersen

Publication year - 2021

Publication title -

applied physics letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.182

H-Index - 442

eISSN - 1077-3118

pISSN - 0003-6951

DOI - 10.1063/5.0044018

Subject(s) - purcell effect , spontaneous emission , photon , quantum dot , physics , single photon source , optoelectronics , quantum optics , amplified spontaneous emission , optics , atomic physics , materials science , laser

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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