Open AccessA piezomodulated reflectance study of InAs/GaAs surface quantum dots
Author(s) -
Yu Chen-Hui,
Chong Wang,
Gong Qian,
Bo Zhang,
Wei Lu
Publication year - 2006
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.55.4934
Subject(s) - materials science , quantum dot , spectral line , layer (electronics) , optoelectronics , substrate (aquarium) , reflectivity , condensed matter physics , optics , nanotechnology , physics , oceanography , astronomy , geology
Piezomodulated reflectance (PzR) spectra have been measured for two samples of InAs surface quantum dots (SQDs) deposited on GaAs (311)B substrates with In0.35Ga0.65As template. At 77K multiple confined-state SQDs transitions can be clearly resolved from the PzR spectra . The detailed optical transition features of SQDs, QDs buried by capping layer, In0.35Ga0.65As template and GaAs substrate layers were obtained from well-fitted PzR spectra using the first or third derivative of a Lorentz line shape. Differences between PzR results of two samples were discussed qualitatively.