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

Javadi, A., Maibom, S., Sapienza, L., Thyrrestrup, H., García, P. D. and Lodahl, P. (2014) Statistical measurements of quantum emitters coupled to Anderson-localized modes in disordered photonic-crystal waveguides. Optics Express, 22(25), pp. 30992-31001. (doi: 10.1364/OE.22.030992) (PMID:25607048)

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.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Sapienza, Dr Luca
• Authors: Javadi, A., Maibom, S., Sapienza, L., Thyrrestrup, H., García, P. D., and Lodahl, P.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Optics Express
• Publisher: Optica
• ISSN: 1094-4087
• ISSN (Online): 1094-4087