Cascaded Cavities Boost the Indistinguishability of Imperfect Quantum Emitters

被引：40

作者：

Choi, Hyeongrak ^{[1
]}

Zhu, Di ^{[1
]}

Yoon, Yoseob ^{[2
]}

Englund, Dirk ^{[1
]}

机构：

[1] MIT, Res Lab Elect, 77 Massachusetts Ave, Cambridge, MA 02139 USA

[2] MIT, Dept Chem, Cambridge, MA 02139 USA

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 122卷 / 18期

关键词：

EMISSION; CENTERS; LIGHT;

D O I：

10.1103/PhysRevLett.122.183602

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Recently, Grange et al. [Phys. Rev. Lett. 114, 193601 (2015)] 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 room-temperature quantum emitters.

引用

页数：6

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