High resolution resonant photoluminescence excitation of CdSe/ZnS nanocrystals at low temperatures

Olivier Labeau (1) , Philippe Tamarat (1) , Brahim Lounis (1)

1 CPMOH - Centre de physique moléculaire optique et hertzienne

We present a new technique to perform high resolution resonant photoluminescence excitation of CdSe/ZnS nanocrystals. The method takes advantage of the long photoluminescence decay times (~ 1 Μs) observed in this system at liquid helium temperatures. Resonant photoluminescence excitation can be performed using a tunable pulsed excitation and a time-gated detection. Spectral hole burning investigations on an ensemble of CdSe/ZnS nanocrystals lead to homogeneous linewidths of ~100 µeV for the band edge exciton state.

Mots clés: single nano-object detection; CdSe/ZnS quantum dots; high resolution spectroscopy; spectral hole burning

Domaines: Optique [physics.optics]; Autre [cond-mat.other]

Olivier Labeau, Philippe Tamarat, Brahim Lounis. High resolution resonant photoluminescence excitation of CdSe/ZnS nanocrystals at low temperatures. Applied Physics Letters, 2006, 88, pp.223110. ⟨10.1063/1.2208962⟩. ⟨hal-00144124⟩