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Multiple confined‐state transitions within surface quantum dots by a piezomodulation reflectance study
Author(s) -
Yu C. H.,
Wang C.,
Zhang B.,
Gong Q.,
Li Y. J.,
Lu W.,
Shen S. C.
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200622367
Subject(s) - quantum dot , substrate (aquarium) , reflectivity , materials science , spectroscopy , surface (topology) , condensed matter physics , molecular physics , optoelectronics , analytical chemistry (journal) , optics , chemistry , physics , geometry , quantum mechanics , geology , mathematics , oceanography , chromatography
Multiple confined‐state transitions within surface quantum dots deposited on In 0.35 Ga 0.65 As template grown on GaAs (311) B substrate, as well as signals from all other relevant portions of the samples including buried QDs, In 0.35 Ga 0.65 As template, and GaAs‐related layers, at 77 K, were obtained in a piezomodulation reflectance spectroscopy (PzR) study. The measured transition energies were accurately determined using a Gaussian lineshape fit based on the reference of PL results. Four factors caused the large energy shift (larger than 400 meV) of confined states within SQDs compared to the buried QDs. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)