Ultrafast dynamics in a single CdSe/ZnSe quantum dot

Author

Thomay, T. ; Korger, J. ; Sotier, F. ; Hanke, T. ; Mahapatra, S. ; Frey, A. ; Brunner, K. ; Bratschitsch, R. ; Leitenstorfer, A.

Author_Institution

Dept. of Phys., Univ. of Konstanz, Konstanz, Germany

fYear

2009

fDate

14-19 June 2009

Firstpage

1

Lastpage

1

Abstract

We have performed two-color femtosecond pump-probe spectroscopy on a single self-assembled CdSe/ZnSe quantum dot. The transient quantum dynamics was probed with resonant excitation and detection. Microphotoluminescence (PL) spectrum of the quantum dot is also measured. The resonant generation of a highly energetic exciton ("hot exciton") by the pump pulse results in an instantaneous bleaching of the exciton resonance at 2.112 eV via Coulomb renormalization of the transition.

Keywords

II-VI semiconductors; cadmium compounds; excitons; high-speed optical techniques; photoluminescence; semiconductor quantum dots; zinc compounds; CdSe-ZnSe; Coulomb renormalization; exciton resonance; hot exciton; microphotoluminescence; quantum dot; transient quantum dynamics; two-color femtosecond pump-probe spectroscopy; ultrafast dynamics; Delay; Excitons; Laser excitation; Optical pulses; Photoluminescence; Probes; Quantum dot lasers; Quantum dots; Resonance; Zinc compounds;

fLanguage

English

Publisher

ieee

Conference_Titel

Lasers and Electro-Optics 2009 and the European Quantum Electronics Conference. CLEO Europe - EQEC 2009. European Conference on

Conference_Location

Munich

Print_ISBN

978-1-4244-4079-5

Electronic_ISBN

978-1-4244-4080-1

Type

conf

DOI

10.1109/CLEOE-EQEC.2009.5192026

Filename

5192026