Filter-free high-performance single photon emission from a quantum dot in a Fabry-Perot microcavity

• URL: http://arxiv.org/abs/2402.11623v2
• Date: Mon, 18 Mar 2024 03:45:17 GMT
• Title: Filter-free high-performance single photon emission from a quantum dot in a Fabry-Perot microcavity
• Authors: Zhixuan Rao, Jiawei Yang, Changkun Song, Mujie Rao, Ziyang Zheng, Luyu Liu, Xuebin Peng, Ying Yu, Siyuan Yu,
• Abstract summary: Resonant excitation with Purcell-enhanced single quantum dots (QDs) is a prominent strategy for realizing high performance solid-state single photon sources. Traditionally, this involves polarization filtering, which limits the achievable polarization directions and the scalability of photonic states. We have successfully tackled this challenge by employing spatially-orthogonal resonant excitation of QDs, deterministically coupled to monolithic Fabry-Perot microcavities. The resulting source produces single photons with a simultaneous high extraction efficiency of 0.87, purity of 0.9045(4), and indistinguishability of 0.963(4).
• Score: 11.420650731006665
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Combining resonant excitation with Purcell-enhanced single quantum dots (QDs) stands out as a prominent strategy for realizing high performance solid-state single photon sources. However, optimizing photon efficiency requires addressing challenges associated with effectively separating the excitation laser from QDs' emission. Traditionally, this involves polarization filtering, which limits the achievable polarization directions and the scalability of photonic states. In this study, we have successfully tackled this challenge by employing spatially-orthogonal resonant excitation of QDs, deterministically coupled to monolithic Fabry-Perot microcavities. Leveraging the membrane cavity structures, we have achieved filter-free single photon resonant fluorescence. The resulting source produces single photons with a simultaneous high extraction efficiency of 0.87, purity of 0.9045(4), and indistinguishability of 0.963(4).

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