Optimization of a micropillar cavity for an efficient single-photon source

초록

We optimized the micropillar cavity for an efficient single photon source by calculating the collection efficiency, spontaneous emission enhancement factor, and top emission efficiency separately. Far-field patterns obtained by using Fourier transforms provided the collection efficiency quantitatively as a function of the diameter of the pillar. The spontaneous emission factor and the top emission efficiency were calculated for various numbers of top distributed Bragg reflector (DBR) pairs. We could achieve a high total efficiency of 0.88 for the optimized micropillar cavity with a diameter of 2 A mu m, 13 (27) top (bottom) DBR pairs, and a lens with NA = 0.85, providing one of the best candidates for an efficient single-photon source.

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