title: Statistical measurements of quantum emitters coupled to Anderson-localized modes in disordered photonic-crystal waveguides.
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.
authors.forename: Alisa
authors.initials: A
authors.lastname: Javadi
authors.forename: Sebastian
authors.initials: S
authors.lastname: Maibom
authors.forename: Luca
authors.initials: L
authors.lastname: Sapienza
authors.forename: Henri
authors.initials: H
authors.lastname: Thyrrestrup
authors.forename: Pedro D
authors.initials: PD
authors.lastname: García
authors.forename: Peter
authors.initials: P
authors.lastname: Lodahl