Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/69693
標題: Anomalous optical magnetic shift of self-assembled GaSb/GaAs quantum dots
作者: Lin, T.C.
Li, L.C.
Lin, S.D.
Suen, Y.W.
Lee, C.P.
Project: Journal of Applied Physics
期刊/報告no:: Journal of Applied Physics, Volume 110, Issue 1.
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. (C) 2011 American Institute of Physics. [doi:10.1063/1.3607973]
URI: http://hdl.handle.net/11455/69693
ISSN: 0021-8979
DOI: 10.1063/1.3607973
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