Statistical measurements of quantum emitters coupled to Anderson-localized modes in disordered photonic-crystal waveguides

被引：22

作者：

Javadi, Alisa ^{[1
]}

Maibom, Sebastian ^{[1
]}

Sapienza, Luca ^{[1
]}

Thyrrestrup, Henri ^{[1
]}

Garcia, Pedro D. ^{[1
]}

Lodahl, Peter ^{[1
]}

机构：

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

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 25期

基金：

欧洲研究理事会;

关键词：

SPONTANEOUS EMISSION; SLOW-LIGHT; ELECTRODYNAMICS; DOT;

D O I：

10.1364/OE.22.030992

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a statistical study of the Purcell enhancement of the light emission from quantum dots coupled to Anderson-localized cavities formed in disordered photonic-crystal waveguides. We measure the time-resolved light emission from both single quantum emitters coupled to Anderson-localized cavities and directly from the cavities that are fed by multiple quantum dots. Strongly inhibited and enhanced decay rates are observed relative to the rate of spontaneous emission in a homogeneous medium. From a statistical analysis, we report an average Purcell factor of 4.5 +/- 0.4 without applying any spectral tuning. By spectrally tuning individual quantum dots into resonance with Anderson-localized modes, a maximum Purcell factor of 23.8 +/- 1.5 is recorded, which is at the onset of the strong-coupling regime. Our data quantify the potential of Andersonlocalized cavities for controlling and enhancing the light-matter interaction strength in a photonic-crystal waveguide, which is of relevance for cavity quantum-electrodynamics experiments, efficient energy harvesting and random lasing. (C) 2014 Optical Society of America

引用

页码：30992 / 31001

页数：10

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