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Excitonic band edges and optical anisotropy of InAs/InP quantum dot structures

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9 Author(s)
Mazur, Yu.I. ; Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA ; Noda, S. ; Tarasov, G.G. ; Dorogan, V.G.
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Optical transitions in InAs/InP quantum dot structures are studied and interpreted in terms of heavy- (hh) and light-hole (lh) excitons originating in InAs valence band. Appearance of a step-like absorption and two activation energies in photoluminescence spectra of quantum dots under temperature elevation is described as a transition from the excitonic states to the two-dimensional-like states realized in the InAs/InP quantum dots. A mixture of hh and lh states determines the anisotropy of the transmission spectra and may result in rotation of the polarization plane for light transmitted through the InAs/InP quantum dot system.

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Journal of Applied Physics  (Volume:103 ,  Issue: 5 )