Absorption and photoluminescence spectroscopy on a single self-assembled charge-tunable quantum dot

Abstract

We have performed detailed photoluminescence (PL) and absorption spectroscopy on the same single self-assembled quantum dot in a charge-tunable device. The transition from neutral to charged exciton in the PL occurs at a more negative voltage than the corresponding transition in absorption. We have developed a model of the Coulomb blockade to account for this observation. At large negative bias, the absorption broadens as a result of electron and hole tunneling. We observe resonant features in this regime whenever the quantum dot hole level is resonant with two-dimensional hole states located at the capping layer-blocking barrier interface in our structure.

6 pages, 6 figures

References in corpus (2)

• Voltage-Controlled Optics of a Quantum Dot
• Shell structure and electron-electron interaction in self-assembled InAs quantum dots

Cited by in corpus (21)

• Giant Optical Non-linearity induced by a Single Two-Level System interacting with a Cavity in the Purcell Regime
• Prospects for measurement-based quantum computing with solid state spins
• Coulomb interactions in single, charged self-assembled quantum dots: radiative lifetime and recombination energy
• Microcavity controlled coupling of excitonic qubits
• Optical detection of single electron spin resonance in a quantum dot
• A single quantum dot as an optical thermometer for mK temperatures
• Narrow optical linewidths and spin pumping on charge-tunable, close-to-surface self-assembled quantum dots in an ultra-thin diode
• Contrast in transmission spectroscopy of a single quantum dot
• Electro-elastic tuning of single particles in individual self-assembled quantum dots
• Strong Electron-Hole Exchange in Coherently Coupled Quantum Dots
• Optical blocking of electron tunneling into a single self-assembled quantum dot
• Locating environmental charge impurities with confluent laser spectroscopy of multiple quantum dots
• Stark Spectroscopy and Radiative Lifetimes in Single Self-Assembled CdTe Quantum Dots
• 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
• Laser spectroscopy of individual quantum dots charged with a single hole
• Charge-Tunable Indium Gallium Nitride Quantum Dots
• A charge-driven feedback loop in the resonance fluorescence of a single quantum dot
• Photon noise suppression by a built-in feedback loop
• GHz bandwidth electro-optics of a single self-assembled quantum dot in a charge-tunable device
• Optical readout of charge and spin in a self-assembled quantum dot in a strong magnetic field