In-plane radiative recombination channel of a dark exciton in self-assembled quantum dots

Abstract

We demonstrate evidence for a radiative recombination channel of dark excitons in self-assembled quantum dots. This channel is due to a light hole admixture in the excitonic ground state. Its presence was experimentally confirmed by a direct observation of the dark exciton photoluminescence from a cleaved edge of the sample. The polarization resolved measurements revealed that a photon created from the dark exciton recombination is emitted only in the direction perpendicular to the growth axis. Strong correlation between the dark exciton lifetime and the in-plane hole g-factor enabled us to show that the radiative recombination is a dominant decay channel of the dark excitons in CdTe/ZnTe quantum dots.

References in corpus (4)

• Entangled Photon Pairs from Semiconductor Quantum Dots
• Quantum computing by optical control of electron spins
• Excitation mechanisms of individual CdTe/ZnTe quantum dots studied by photon correlation spectroscopy
• Brightening of dark excitons in a single quantum dot containing a single magnetic ion

Cited by in corpus (7)

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• Coherent dynamics of a single Mn-doped quantum dot revealed by four-wave mixing spectroscopy
• Dark-bright excitons mixing in alloyed InGaAs self-assembled quantum dots
• CdSe/ZnSe quantum dot with a single Mn${}^{2+}$ ion - a new system for a single spin manipulation
• Photocreation of a dark electron-hole pair in a quantum dot