Locating environmental charge impurities with confluent laser spectroscopy of multiple quantum dots
arXiv:1410.1341 · doi:10.1103/PhysRevB.90.235306
Abstract
We used resonant laser spectroscopy of multiple confocal InGaAs quantum dots to spatially locate charge fluctuators in the surrounding semiconductor matrix. By mapping out the resonance condition between a narrow-band laser and the neutral exciton transitions of individual dots in a field effect device, we identified spectral discontinuities as arising from charging and discharging events that take place within the volume adjacent to the quantum dots. Our analysis suggests that residual carbon dopants are a major source of charge-fluctuating traps in quantum dot heterostructures.
References in corpus (12)
- Review: Semiconductor Quantum Light Sources
- Unconditional quantum teleportation between distant solid-state qubits
- Charge noise and spin noise in a semiconductor quantum device
- Resonance fluorescence from a coherently driven semiconductor quantum dot in a cavity
- Spin-resolved quantum-dot resonance fluorescence
- Sub-Natural Linewidth Single Photons from a Quantum Dot
- Voltage-Controlled Optics of a Quantum Dot
- Manipulating exciton fine-structure in quantum dots with a lateral electric field
- Quantum Teleportation from a Propagating Photon to a Solid-State Spin Qubit
- Probing single charge fluctuations in a semiconductor with laser spectroscopy on a quantum dot
- Absorption and photoluminescence spectroscopy on a single self-assembled charge-tunable quantum dot
- A frequency-stabilized source of single photons from a solid-state qubit
Cited by in corpus (8)
- Low-frequency charge noise in Si/SiGe quantum dots
- Size dependent line broadening in the emission spectra of single GaAs quantum dots: Impact of surface charges on spectral diffusion
- Microscopic models for charge-noise-induced dephasing of solid-state qubits
- Nanoscopic charge fluctuations in a gallium phosphide waveguide measured by single molecules
- Dipolar and charged localized excitons in carbon nanotubes
- Generating indistinguishable photons from a quantum dot in a noisy environment
- Giant Purcell broadening and Lamb shift for DNA-assembled near-infrared quantum emitters
- A charge-driven feedback loop in the resonance fluorescence of a single quantum dot