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The continuum state in photoluminescence of type-II In0.46Al0.54As/ Al0.54Ga0.46As quantum dots.
- Source :
- Applied Physics Letters; 10/31//2016, Vol. 109 Issue 18, p183103-1-183103-5, 5p, 5 Graphs
- Publication Year :
- 2016
-
Abstract
- The continuum state associated with type-II In<subscript>0.46</subscript>Al<subscript>0.54</subscript>As/Al<subscript>0.54</subscript>Ga<subscript>0.46</subscript>As quantum dots (QDs) is investigated. Emission from the continuum states of the QDs is directly observed in photoluminescence (PL) spectra. The PL excitation and time-resolved PL spectra reveal an efficient carrier relaxation from the AlGaAs barrier into the InAlAs QD ground state via the continuum states. The temperature dependence of the PL spectra shows a decreasing PL linewidth and a strong redshift of the peak energy at low temperature, indicating that carriers are redistributed through the continuum states by thermal activation and lateral transfer. Published by AIP Publishing. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 109
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 119275195
- Full Text :
- https://doi.org/10.1063/1.4966895