Picosecond charge variation of quantum dots under pulsed excitation

Abstract

We present a spectroscopic study of excitation dynamics in self assembled CdTe/ZnTe quantum dots. Insight into details of kinetics is obtained from the time resolved micro-photoluminescence, single photon correlation and subpicosecond excitation correlation measurements done on single quantum dots. It is shown that the pulsed excitation in energy above the energy gap of the barrier material results in separate capture of electrons and holes. The capture of carriers of different charge take place at different delay from excitation.

10 pages, 11 figures

References in corpus (2)

• Excitation mechanisms of individual CdTe/ZnTe quantum dots studied by photon correlation spectroscopy
• Optically induced energy and spin transfer in non-resonantly coupled pairs of self-assembled CdTe/ZnTe quantum dots

Cited by in corpus (12)

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• Inter-shell exchange interaction in CdTe/ZnTe quantum dots: magneto-photoluminescence of X, X2- and XX-
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• Optical study of electron-electron exchange interaction in CdTe/ZnTe quantum dots
• Ultra low density of CdTe quantum dots grown by MBE
• Tuning the inter-shell splitting in self-assembled CdTe quantum dots
• Introducing single Mn2+ ions into spontaneously coupled quantum dot pairs
• Excitonic fine structure of epitaxial Cd(Se,Te) on ZnTe type-II quantum dots
• Strongly temperature-dependent recombination kinetics of a negatively charged exciton in asymmetric quantum dots at 1.55 μm
• CdSe/ZnSe quantum dot with a single Mn${}^{2+}$ ion - a new system for a single spin manipulation
• Mechanisms of optical orientation of an individual Mn${}^{2+}$ ion spin in a II-VI quantum dot
• Optical signatures of spin dependent coupling in semimagnetic quantum dot molecules