Anomalous optical magnetic shift of self-assembled GaSb/GaAs quantum dots

Ta Chun Lin*, Liang Chen Li, Sheng-Di Lin, Yuen Wuu Suen, Chien Ping Lee

*Corresponding author for this work

研究成果: Article同行評審

4 引文 斯高帕斯(Scopus)

摘要

We report the magneto-photoluminescence (PL) measurement results on type-II self-assembled GaSb/GaAs quantum dots with the magnetic field applied in Faraday and Voigt configurations. The emission of the quantum dots exhibited a typical diamagnetic blueshift when the magnetic field was applied in a Faraday configuration. However, when the magnetic field was in the Voigt configuration, an unusual redshift in the emission peak accompanied with a rapid increase of the PL intensity was observed. Guided by numerical calculations, the magnetic field applied in the Voigt configuration is found to provide an additional vertical confinement to electrons, and therefore, substantially enhance the radiative electron-hole recombination. The resulting decrease of the steady-state hole concentration gives rise to the observed anomalous magnetic redshift.

原文English
文章編號013522
期刊Journal of Applied Physics
110
發行號1
DOIs
出版狀態Published - 1 七月 2011

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