Author(s): Sun, TJ (Sun, Tian-Jiao); Sterin, P (Sterin, P.); Lengert, L (Lengert, L.); Nawrath, C (Nawrath, C.); Jetter, M (Jetter, M.); Michler, P (Michler, P.); Ji, Y (Ji, Yang); Huebner, J (Huebner, J.); Oestreich, M (Oestreich, M.)

Source: JOURNAL OF APPLIED PHYSICS Volume: 131 Issue: 6 Article Number: 065703 DOI: 10.1063/5.0078910 Published: FEB 14 2022

Abstract: We report on the spin and occupation noise of a single, positively charged (InGa)As quantum dot emitting photons in the telecommunication C-band. The spin noise spectroscopy measurements are carried out at a temperature of 4.2 K in dependence on intensity and detuning in the regime beyond thermal equilibrium. The spin noise spectra yield in combination with an elaborate theoretical model the hole-spin relaxation time of the positively charged quantum dot and the Auger recombination and the electron-spin relaxation time of the trion state. The extracted Auger recombination time of this quantum dot emitting at 1.55 mu m is comparable to the typical Auger recombination times on the order of a few mu s measured in traditionally grown InAs/GaAs quantum dots emitting at around 900 nm. (c) 2022 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

Accession Number: WOS:000757560800003

ISSN: 0021-8979

eISSN: 1089-7550

Full Text: https://aip.scitation.org/doi/10.1063/5.0078910