Title :
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
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;
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
DOI :
10.1109/CLEOE-EQEC.2009.5192026
