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

Alisa Javadi, Sebastian Maibom, Luca Sapienza, Henri Thyrrestrup, Pedro D. García, Peter Lodahl

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Abstract

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 Anderson-localized 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. © 2014 Optical Society of America
Original languageEnglish
Pages (from-to)30992-30992
JournalOptics express
Volume22
Issue number25
DOIs
Publication statusPublished - 2014

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    Javadi, A., Maibom, S., Sapienza, L., Thyrrestrup, H., García, P. D., & Lodahl, P. (2014). Statistical measurements of quantum emitters coupled to Anderson-localized modes in disordered photonic-crystal waveguides. Optics express, 22(25), 30992-30992. https://doi.org/10.1364/OE.22.030992