Elliptical micropillar cavity design for highly efficient polarized emission of single photons

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Abstract

We present a numerical investigation of the performance of the micropillar cavity single-photon source featuring an elliptical cross section. While ellipticity serves to establish polarization control of the emitted photons, it introduces a trade-off due to reduced coupling to a Gaussian profile in the far field and the need for significantly increased pumping power when a resonant excitation pumping scheme is implemented. Starting from a circular micropillar, we identify optimum geometrical parameters leading to a maximum polarized coupling efficiency of 0.90 to a Gaussian profile in the far field combined with a modest relative increase in the pump power of 16 dB.
Original languageEnglish
Article number061101
JournalApplied Physics Letters
Volume118
Issue number6
Number of pages7
ISSN0003-6951
DOIs
Publication statusPublished - 2021

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