Time‐resolved detection of many‐particle hole states in InAs/GaAs quantum dots using a two‐dimensional hole gas up to 77 K

Nowozin, Tobias; Marent, A.; Bimberg, D.; Beckel, A.; Marquardt, B.; Lorke, Axel; Geller, M.

doi:10.1002/pssc.201100218

Cited by 2 publications

(1 citation statement)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Simplified, every electron in the dot depletes one electron in the 2DEG. The conductivity in the electron gas is reduced and this reduction can be measured time‐resolved with a time resolution that is mainly limited by the experimental setup (parasitic RC constant) and the tunneling time of the charge carrier through the tunneling barrier, . The influence of the charged dots as Coulomb scatters can be neglected ().…”

Section: Electrical Transconductance Spectroscopymentioning

confidence: 99%

Electron dynamics in transport and optical measurements of self‐assembled quantum dots

Kurzmann

Merkel

Marquardt

et al. 2017

Physica Status Solidi (b)

View full text Add to dashboard Cite

The tunneling dynamics between self‐assembled quantum dots (QDs) and a charge reservoir can be measured in an all‐electrical or optical detection scheme. In all‐electrical transconductance spectroscopy, a two‐dimensional electron gas is used to probe the evolution of the many‐particle states inside an ensemble of QDs from non‐equilibrium to equilibrium. The optical detection scheme measures the tunneling dynamic into a single self‐assembled dot. The work done and results obtained using these different measurement techniques are reviewed and compared within this article. We will show that transconductance spectroscopy is sensitive to a time‐dependent density of states and enables preparation of non‐equilibrium charge and spin states for future applications in quantum information processing. The optical resonance fluorescence measurements on the electron dynamics demonstrates the influence of the exciton states on the charge‐carrier dynamics and enables a systematic study of the Auger recombination in self‐assembled dots.

show abstract

Section: Electrical Transconductance Spectroscopymentioning

confidence: 99%

Electron dynamics in transport and optical measurements of self‐assembled quantum dots

Kurzmann

Merkel

Marquardt

et al. 2017

Physica Status Solidi (b)

View full text Add to dashboard Cite

show abstract

Nonequilibrium carrier dynamics in self-assembled quantum dots

Geller

2019

Applied Physics Reviews

View full text Add to dashboard Cite

Self-assembled quantum dots are still one of the best model systems for artificial atoms in a solid-state environment, where the electronic states can be accessed by electrical and optical means. This article focuses on nonequilibrium carrier dynamics in these quantum dots, using the ability of recent developments in electrical and optical spectroscopy techniques. All-electrical transconductance spectroscopy is introduced, where a two-dimensional electron gas serves as a fast and sensitive detector for the electron/hole dynamics and charge/spin state preparation and relaxation in an ensemble of dots. Latest results on single electron tunneling and nonequilibrium Auger recombination in a single quantum dot using a high-resolution optical experiment (the time-resolved resonance fluorescence) are summarized. This article concludes with a perspective view on a future combination of both techniques toward an electro-optical measurement toolbox to link the coherent control of quantum states by optical means with an electrical preparation of electron charge and spin states.

show abstract

Time‐resolved detection of many‐particle hole states in InAs/GaAs quantum dots using a two‐dimensional hole gas up to 77 K

Cited by 2 publications

References 11 publications

Electron dynamics in transport and optical measurements of self‐assembled quantum dots

Electron dynamics in transport and optical measurements of self‐assembled quantum dots

Nonequilibrium carrier dynamics in self-assembled quantum dots

Contact Info

Product

Resources

About