Photoelectron generation and capture in the resonance fluorescence of a quantum dot

Abstract

Time-resolved resonance fluorescence (RF) on a single self-assembled quantum dot (QD) is used to analyze the generation and capture of photoinduced free charge carriers. We directly observe the capture of electrons into the QD in an intensity reduction of the exciton transition. The exciton transition is quenched until the captured electron tunnels out of the dot again in the order of milliseconds. Our results demonstrate that even under resonant excitation, excited, free electrons are generated, which can negatively influence the optical properties of a QD. This detrimental effect has been neglected before for dots that are optimized for maximum efficiency and minimum spectral diffusion.

References in corpus (4)

• Low Temperature Studies of Charge Dynamics of Nitrogen-Vacancy Defect in Diamond
• Phase-locked indistinguishable photons with synthesized waveforms from a solid-state source
• Auger recombination in self-assembled quantum dots: Quenching and broadening of the charged exciton transition
• Contrast in transmission spectroscopy of a single quantum dot

Cited by in corpus (6)

• Quantum optics with near lifetime-limited quantum-dot transitions in a nanophotonic waveguide
• Optical detection of single electron transport dynamics
• Real-time detection of every Auger recombination in a self-assembled quantum dot
• Internal Photo Effect from a Single Quantum Emitter
• Photon noise suppression by a built-in feedback loop
• A charge-driven feedback loop in the resonance fluorescence of a single quantum dot