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 lightemission from quantum dots coupled to Anderson-localized cavities formedin disordered photonic-crystal waveguides. We measure the time-resolvedlight emission from both single quantum emitters coupled toAnderson-localized cavities and directly from the cavities that are fedby multiple quantum dots. Strongly inhibited and enhanced decay ratesare observed relative to the rate of spontaneous emission in ahomogeneous medium. From a statistical analysis, we report an averagePurcell factor of 4.50.4 without applying any spectral tuning. Byspectrally tuning individual quantum dots into resonance withAnderson-localized modes, a maximum Purcell factor of 23.81.5 isrecorded, which is at the onset of the strong-coupling regime. Our dataquantify the potential of Anderson-localized cavities for controllingand enhancing the light-matter interaction strength in aphotonic-crystal waveguide, which is of relevance for cavityquantum-electrodynamics experiments, efficient energy harvesting andrandom lasing. |
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| Authors | A. Javadi, S. Maibom, L. Sapienza, H. Thyrrestrup, P. D. García, P. Lodahl |
| Year of publication | 2014 |
| Date published | 12/2014 |
| Journal | Opt. Express |
| Volume | 22 |
| Pages | 30992-31001 |
| Keywords | 2D crystals, Disordered waveguide, quantum dots, Random modes |