Efficient fiber-coupled single-photon source based on quantum dots in a photonic-crystal waveguide

被引：96

作者：

Daveau, Raphael S. ^{[1
]}

Balram, Krishna C. ^{[2
,3
]}

Pregnolato, Tommaso ^{[1
]}

Liu, Jin ^{[2
,3
]}

Lee, Eun H. ^{[4
]}

Song, Jin D. ^{[4
]}

Verma, Varun ^{[5
]}

Mirin, Richard ^{[5
]}

Nam, Sae Woo ^{[5
]}

Midolo, Leonardo ^{[1
]}

Stobbe, Soren ^{[1
]}

Srinivasan, Kartik ^{[2
]}

Lodahl, Peter ^{[1
]}

机构：

[1] Univ Copenhagen, Niels Bohr Inst, Blegdamsvej 17, DK-2100 Copenhagen, Denmark

[2] NIST, Ctr Nanoscale Sci & Technol, Gaithersburg, MD 20899 USA

[3] Univ Maryland, Maryland NanoCtr, College Pk, MD 20742 USA

[4] Korea Inst Sci & Technol, Ctr Optoelect Convergence Syst, Seoul 136791, South Korea

[5] NIST, Boulder, CO 80305 USA

来源：

OPTICA | 2017年 / 4卷 / 02期

基金：

欧洲研究理事会;

关键词：

PERFORMANCE;

D O I：

10.1364/OPTICA.4.000178

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Many photonic quantum information processing applications would benefit from a high brightness, fiber-coupled source of triggered single photons. Here, we present a fiber-coupled photonic-crystal waveguide (PCWG) single-photon source relying on evanescent coupling of the light field from a tapered outcoupler to an optical fiber. A two-step approach is taken where the performance of the tapered outcoupler is recorded first on an independent device containing an on-chip reflector. Reflection measurements establish that the chip-to-fiber coupling efficiency exceeds 80%. The detailed characterization of a high-efficiency PCWG extended with a tapered outcoupling section is then performed. The corresponding overall single-photon source efficiency is 10.9% +/- 2.3%, which quantifies the success probability to prepare an exciton in the quantum dot, couple it out as a photon in the waveguide, and subsequently transfer it to the fiber. The applied outcoupling method is robust, stable over time, and broadband over several tens of nanometers, which makes it a highly promising pathway to increase the efficiency and reliability of planar chip-based single-photon sources. (C) 2017 Optical Society of America

引用

页码：178 / 184

页数：7

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