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.
Suppression of background emission for efficient single-photon generation in micropillar cavities
Note: This paper is part of the APL Special Collection on Non-Classical Light Emitters and Single-Photon Detectors.
Bi-Ying Wang, Teppo Häyrynen, Luca Vannucci, Martin Arentoft Jacobsen, Chao-Yang Lu, Niels Gregersen; Suppression of background emission for efficient single-photon generation in micropillar cavities. Appl. Phys. Lett. 15 March 2021; 118 (11): 114003. https://doi.org/10.1063/5.0044018
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