Experimental realization of highly efficient broadband coupling of single quantum dots to a photonic crystal waveguide

Toke Lund-Hansen, Søren Stobbe, Brian Julsgaard, Henri Thyrrestrup Nielsen, T. Sünner, M. Kamp, A. Forchel, Peter Lodahl

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Abstract

We present time-resolved spontaneous emission measurements of single quantum dots embedded in photonic crystal waveguides. Quantum dots that couple to a photonic crystal waveguide are found to decay up to 27 times faster than uncoupled quantum dots. From these measurements -factors of up to 0.89 are derived, and an unprecedented large bandwidth of 20 nm is demonstrated. This shows the promising potential of photonic crystal waveguides for efficient single-photon sources. The scaled frequency range over which the enhancement is observed is in excellent agreement with recent theoretical proposals taking into account that the light-matter coupling is strongly enhanced due to the significant slow-down of light in the photonic crystal waveguides.
Original languageEnglish
JournalPhysical Review Letters
Volume101
Issue number11
Pages (from-to)113903
ISSN0031-9007
DOIs
Publication statusPublished - 2008

Bibliographical note

Copyright 2008 American Physical Society

Keywords

  • SPONTANEOUS-EMISSION
  • NANOCAVITIES

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