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Theory of optical manipulation of semiconductor quantum dots confining excitons
Author(s) -
Iida T.,
Ishihara H.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200303016
Subject(s) - quantum dot , exciton , physics , semiconductor , quantum dot laser , homogeneity (statistics) , radius , condensed matter physics , optoelectronics , semiconductor laser theory , statistics , mathematics , computer security , computer science
We present a theoretical study of optical manipulation of spherical semiconductor quantum dots confining excitonic center‐of‐mass motion. The radiation force that is exerted on a dot floating in a vacuum is calculated by using the Maxwell stress tensor expressed in terms of the microscopic response field. The following advantageous effects are clarified: (1) The acceleration (the force normalized by the mass of a dot) exerted by the resonant light is greatly enhanced for a dot with a radius of less than 100 nm. Especially, for smaller dots with a radius near 10 nm, this enhancement is conspicuous. (2) The spectral peak position of exerted force is extremely sensitive to nanoscale‐size changes, which can be utilized for size selection of quantum dots. Such results will open the way to the fabrication of nanostructures composed of arranged quantum dots with ultrahigh homogeneity.