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.
Bibliographical noteCopyright 2008 American Physical Society
Lund-Hansen, T., Stobbe, S., Julsgaard, B., Nielsen, H. T., Sünner, T., Kamp, M., Forchel, A., & Lodahl, P. (2008). Experimental realization of highly efficient broadband coupling of single quantum dots to a photonic crystal waveguide. Physical Review Letters, 101(11), 113903. https://doi.org/10.1103/PhysRevLett.101.113903