Excitation mechanisms of individual CdTe/ZnTe quantum dots studied by photon correlation spectroscopy

Abstract

Systematic measurements of auto- and cross-correlations of photons emitted from individual CdTe/ZnTe quantum dots under pulsed excitation were used to elucidate non-resonant excitation mechanisms in this self-assembled system. Memory effects extending over a few excitation pulses have been detected in agreement with previous reports and quantitatively described by a rate equation model, fitting a complete set of correlation and PL intensity results. The important role of single carrier trapping in the quantum dot was established. An explanation was suggested for the unusually wide antibunching dip observed previously in X-X autocorrelation experiments on quantum dots under cw excitation.

arXiv comment8 pages, 8 figures

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Cited by in corpus (24)

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• Brightening of dark excitons in a single quantum dot containing a single magnetic ion
• In-plane radiative recombination channel of a dark exciton in self-assembled quantum dots
• Inter-shell exchange interaction in CdTe/ZnTe quantum dots: magneto-photoluminescence of X, X2- and XX-
• InP-based single-photon sources operating at telecom C-band with increased extraction efficiency
• Picosecond charge variation of quantum dots under pulsed excitation
• Stark Spectroscopy and Radiative Lifetimes in Single Self-Assembled CdTe Quantum Dots
• Optical study of electron-electron exchange interaction in CdTe/ZnTe quantum dots
• Ultra low density of CdTe quantum dots grown by MBE
• Direct measurement of hyperfine shifts and radiofrequency manipulation of the nuclear spins in individual CdTe/ZnTe quantum dots
• Influence of exciton spin relaxation on the photoluminescence spectra of semimagnetic quantum dots
• Single spin optical read-out in CdTe/ZnTe quantum dot studied by photon correlation spectroscopy
• Tuning the inter-shell splitting in self-assembled CdTe quantum dots
• Heterogeneous integration of single InAs/InP quantum dots with the SOI chip using direct bonding
• Comparison of magneto-optical properties of various excitonic complexes in CdTe and CdSe self-assembled quantum dots
• Single-photon emission from the natural quantum dots in the InAs/GaAs wetting layer
• Quadexciton cascade and fine structure splitting of the triexciton in a single quantum dot
• CdSe/ZnSe quantum dot with a single Mn${}^{2+}$ ion - a new system for a single spin manipulation
• Anisotropy of in-plane hole g-factor in CdTe/ZnTe quantum dots
• Dynamics of Charge Leakage From Self-assembled CdTe Quantum Dots
• 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