Spontaneous emission of quantum dots in disordered photonic crystal waveguides

Luca Sapienza, Henri Thyrrestrup Nielsen, Søren Stobbe, David Garcia-Fernández, Stephan Smolka, Peter Lodahl

Research output: Contribution to journalConference articleResearchpeer-review


We report on the enhancement of the spontaneous emission rate of single semiconductor quantum dots embedded in a photonic crystal waveguide with engineered disorder. Random high-Q cavities, that are signature of Anderson localization, are measured in photoluminescence experiments and appear in the slow light regime of the waveguide mode. Time resolved experiments show a 15-fold enhancement of the spontaneous emission rate, with coupling efficiencies of single photons into Anderson localized cavity modes of 94%. These results show that the performances of Anderson-localized cavities are comparable to state-of-the-art nano-cavities, proving the potentiality of disorder in light confinement.
Original languageEnglish
JournalProceedings of SPIE, the International Society for Optical Engineering
Pages (from-to)31
Publication statusPublished - 2010
EventNano Science Engineering : Active Photonic Materials III - San Diego, CA, USA
Duration: 1 Jan 2010 → …


ConferenceNano Science Engineering : Active Photonic Materials III
CitySan Diego, CA, USA
Period01/01/2010 → …

Cite this