Papers
Topics
Authors
Recent
Gemini 2.5 Flash
Gemini 2.5 Flash
173 tokens/sec
GPT-4o
7 tokens/sec
Gemini 2.5 Pro Pro
46 tokens/sec
o3 Pro
4 tokens/sec
GPT-4.1 Pro
38 tokens/sec
DeepSeek R1 via Azure Pro
28 tokens/sec
2000 character limit reached

Electron and hole g tensors of neutral and charged excitons in single quantum dots by high-resolution photocurrent spectroscopy (2007.08743v1)

Published 17 Jul 2020 in cond-mat.mes-hall and physics.optics

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.

Citations (7)

Summary

We haven't generated a summary for this paper yet.