Spectroscopy of the two Lowest Exciton Zero-Phonon Lines in Single CdSe/ZnS Nanocrystals

Spectroscopy of the two Lowest Exciton Zero-Phonon Lines in Single CdSe/ZnS Nanocrystals

We study the optical properties of the lowest-energy exciton states in highly photostable individual CdSe/ZnS nanocrystals at low temperatures. We observe two sharp zero-phonon lines which we attribute to the radiative recombination from the two lowest-energy levels of the band-edge exciton fine str...

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Hauptverfasser: Louyer, Y, Biadala, L, Tamarat, Ph, Lounis, B
Format: Tagungsbericht
Sprache:eng
Schlagworte:
Cadmium selenides
Energy levels
Excitons
Fine structure
Line spectra
Low temperature
Nanocrystals
Optical properties
Phonons
Physics
Radiative recombination
Zinc sulfide
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Zusammenfassung:We study the optical properties of the lowest-energy exciton states in highly photostable individual CdSe/ZnS nanocrystals at low temperatures. We observe two sharp zero-phonon lines which we attribute to the radiative recombination from the two lowest-energy levels of the band-edge exciton fine structure. By using resonant laser excitation on these two lines we measure a spectral broadening of 10 μeV over integration times of 100 ms.
ISSN:1742-6596
1742-6588
1742-6596
1742-6588
DOI:10.1088/1742-6596/245/1/012057