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Raman spectroscopy of optical phonons confined in semiconductor quantum dots and nanocrystals
Author(s) -
Rolo A. G.,
Vasilevskiy M. I.
Publication year - 2007
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.1746
Subject(s) - phonon , raman spectroscopy , polaron , raman scattering , exciton , semiconductor , curse of dimensionality , condensed matter physics , excitation , quantum dot , electron , spectroscopy , nanocrystal , coherent anti stokes raman spectroscopy , molecular physics , chemistry , materials science , physics , optoelectronics , nanotechnology , optics , quantum mechanics , machine learning , computer science
This paper gives an overview of theoretical and experimental results on Raman‐active optical phonon modes confined in nearly spherical nanocrystals (NCs) of polar semiconductor materials with cubic crystal structure. A systematic consideration of the effect of reduced dimensionality on both electrons and phonons is presented. The theoretical approach is based on a continuum lattice dynamics model and the effective mass approximation for electronic states in the NCs. Calculated resonant and non‐resonant Raman scattering spectra are compared to experimental data stressing the effects of phonon confinement, type of excitation, polaron correction to the exciton spectrum enhanced because of the reduced dimensionality, and individual features of the NC material. Copyright © 2007 John Wiley & Sons, Ltd.