Title :
Ultrafast spin dynamics in colloidal ZnO quantum dots
Author :
Janssen, N. ; Hanke, T. ; Sotier, F. ; Thomay, T. ; Bratschitsch, R. ; Whitaker, K.M. ; Gamelin, D.R.
Author_Institution :
Dept. of Phys. & Center for Appl. Photonics, Univ. of Konstanz, Konstanz
Abstract :
We perform time-resolved Faraday rotation measurements on colloidal ZnO quantum dots. A biexponential decay of the dephasing time T2* of the electron spins governed by competing recombination processes is observed.
Keywords :
Faraday effect; II-VI semiconductors; colloids; high-speed optical techniques; semiconductor quantum dots; spin dynamics; time resolved spectra; wide band gap semiconductors; zinc compounds; ZnO; biexponential decay; colloidal ZnO quantum dots; dephasing time; electron spins; recombination processes; time-resolved Faraday rotation; ultrafast spin dynamics; Charge carrier processes; Electron optics; Optical polarization; Optical pumping; Probes; Quantum dots; Radiative recombination; Spontaneous emission; Ultrafast optics; Zinc oxide; (320.7130) Ultrafast processes in condensed matter, including semiconductors; (320.7150) Ultrafast spectroscopy;
Conference_Titel :
Lasers and Electro-Optics, 2008 and 2008 Conference on Quantum Electronics and Laser Science. CLEO/QELS 2008. Conference on
Conference_Location :
San Jose, CA
Print_ISBN :
978-1-55752-859-9
