Internal Photo Effect from a Single Quantum Emitter

Abstract

We demonstrate by time-resolved resonance fluorescence measurements on a single self-assembled quantum dot an internal photo-effect that emits electrons from the dot by an intra-band excitation. We find a linear dependence of the optically generated emission rate on the excitation intensity and use a rate equation model to deduce the involved rates. The emission rate is tunable over several orders of magnitude by adjusting the excitation intensity. Our findings show that a process that is well known in single atom spectroscopy (i.e. photo ionization) can also be observed in the solid state. The results also quantify an important, but mostly neglected, mechanism that may fundamentally limit the coherence times in solid-state quantum optical devices.

4 pages, 3 figures

References in corpus (19)

• Spin-resolved quantum-dot resonance fluorescence
• Sub-Natural Linewidth Single Photons from a Quantum Dot
• Low temperature studies of the excited-state structure of Nitrogen-Vacancy color centers in diamond
• Transform-limited single photons from a single quantum dot
• Voltage-Controlled Optics of a Quantum Dot
• Excited-state spectroscopy using single-spin manipulation in diamond
• Optical signatures of silicon-vacancy spins in diamond
• A dark-field microscope for background-free detection of resonance fluorescence from single semiconductor quantum dots operating in a set-and-forget mode
• Controlling chemical reactions of a single particle
• Quadrature squeezed photons from a two-level system
• Optical detection of single electron transport dynamics
• A single quantum dot as an optical thermometer for mK temperatures
• Highly-efficient state-selective sub-microsecond photoionization detection of single atoms
• A frequency-stabilized source of single photons from a solid-state qubit
• Optical blocking of electron tunneling into a single self-assembled quantum dot
• Real-time detection of every Auger recombination in a self-assembled quantum dot
• Photoelectron generation and capture in the resonance fluorescence of a quantum dot
• Photon noise suppression by a built-in feedback loop
• A charge-driven feedback loop in the resonance fluorescence of a single quantum dot