Cascaded Cavities Boost the Indistinguishability of Imperfect Quantum Emitters

Author(s)
Choi, Hyeongrak; Zhu, Di; Yoon, Yoseob; Englund, Dirk R.
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Abstract
Recently, Grange et al. [Phys. Rev. Lett. 114, 193601 (2015)PRLTAO0031-900710.1103/PhysRevLett.114.193601] showed the possibility of single-photon generation with a high indistinguishability from a quantum emitter despite strong pure dephasing, by "funneling" emission into a photonic cavity. Here, we show that a cascaded two-cavity system can further improve the photon characteristics and greatly reduce the Q factor requirement to levels achievable with present-day technology. Our approach leverages recent advances in nanocavities with an ultrasmall mode volume and does not require ultrafast excitation of the emitter. These results were obtained by numerical and closed-form analytical models with strong emitter dephasing, representing roomerature quantum emitters. ©2019 American Physical Society.
Date issued
2019-05
URI
https://hdl.handle.net/1721.1/129687
Department
Massachusetts Institute of Technology. Research Laboratory of Electronics; Massachusetts Institute of Technology. Department of Chemistry
Journal
Physical Review Letters
Publisher
American Physical Society (APS)
Citation
Choi, Hyeongrak et al., "Cascaded Cavities Boost the Indistinguishability of Imperfect Quantum Emitters." Physical Review Letters 122, 18 (May 2019): 183602 ©2019 Authors
Version: Final published version
ISSN
1079-7114
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