Electron and hole g tensors of neutral and charged excitons in single quantum dots by high-resolution photocurrent spectroscopy

Abstract

We report a high-resolution photocurrent (PC) spectroscopy of a single self-assembled InAs/GaAs quantum dot (QD) embedded in an n-i-Schottky device with an applied vector magnetic field. The PC spectra of positively charged exciton (X${}^{+}$) and neutral exciton (X${}^0$) are obtained by two-color resonant excitation. With an applied magnetic field in Voigt geometry, the double $\Lambda$ energy level structure of X${}^{+}$ and the dark states of X${}^0$ are observed in PC spectra clearly. In Faraday geometry, the PC amplitude of X${}^{+}$ decreases and then quenches with the increasing of the magnetic field, which provides a new way to determine the relative sign of the electron and the hole g-factors. With an applied vector magnetic field, the electron and the hole g-factor tensors of X${}^{+}$ and X${}^0$ are obtained. The anisotropy of the hole g-factors of both X${}^{+}$ and X${}^0$ is larger than that of the electron.

arXiv comment21 pages, 5 figures

References in corpus (26)

• Quantum Computation with Quantum Dots
• Experimental observation of the spin-Hall effect in a two dimensional spin-orbit coupled semiconductor system
• On-demand semiconductor single-photon source with near-unity indistinguishability
• Spin-resolved quantum-dot resonance fluorescence
• Coherent control of three-spin states in a triple quantum dot
• A gated quantum dot far in the strong-coupling regime of cavity-QED at optical frequencies
• Theory of Quantum Optical Control of Single Spin in a Quantum Dot
• Tunable effective g-factor in InAs nanowire quantum dots
• Fast optical preparation, control and read-out of single quantum dot spin
• Quantum state preparation in semiconductor dots by adiabatic rapid passage
• Lande g-tensor in semiconductor nanostructures
• Voltage tunability of single spin-states in a quantum dot
• Dark-bright mixing of interband transitions in symmetric semiconductor quantum dots
• High resolution coherent population trapping on a single hole spin in a semiconductor
• Method for Full Bloch-Sphere Control of a Localized Spin via a Single Electrical Gate
• Measurement of g-factor tensor in a quantum dot and disentanglement of exciton spins
• Large anisotropy of electron and hole g factors in infrared-emitting InAs/InAlGaAs self-assembled quantum dots
• Strong electrically tunable exciton g-factors in an individual quantum dots due to hole orbital angular momentum quenching
• Fast preparation of single hole spin in InAs/GaAs quantum dot in Voigt geometry magnetic field
• Electron and hole g factors in InAs/InAlGaAs self-assembled quantum dots emitting at telecom wavelengths
• Probing the dark exciton states of a single quantum dot using photocurrent spectroscopy in magnetic fields
• Voltage-controlled electron tunnelling from a single self-assembled quantum dot embedded in a two-dimensional-electron-gas-based photovoltaic cell
• Anisotropies of the g-factor tensor and diamagnetic coefficient in crystal-phase quantum dots in InP nanowires
• Hole Spin Pumping and Re-pumping in a p-type δ-doped InAs Quantum Dot
• Giant Photocurrent Enhancement by Coulomb Interaction in a Single Quantum Dot for Energy Harvesting
• Tuning the carrier tunneling in a single quantum dot with a magnetic field in Faraday geometry

Cited by in corpus (4)

• Position-dependent chiral coupling between single quantum dots and cross waveguides
• Electron ground state $g$ factor in embedded InGaAs quantum dots: An atomistic study
• Asymmetric Chiral Coupling in a Topological Resonator
• Controllable Spin-Resolved Photon Emission Enhanced by Slow-Light Mode in Photonic Crystal Waveguides on Chip