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Polarization Properties of a CdSe/ZnS and Au Nanoparticle Dimer
Author(s) -
Ratchford Daniel,
Shafiei Farbod,
Gray Stephen K.,
Li Xiaoqin
Publication year - 2012
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201101051
Subject(s) - quantum dot , dimer , polarization (electrochemistry) , excitation , nanoparticle , plasmon , materials science , colloidal gold , surface plasmon , optoelectronics , molecular physics , nanotechnology , chemistry , physics , organic chemistry , quantum mechanics
A hybrid CdSe/ZnS quantum dot and gold nanoparticle dimer is assembled using AFM nanomanipulation. The quantum dot acquires a pronounced polarization dependence on the incident excitation light due to the excitation of localized surface plasmons in the gold nanoparticle (see picture). A large polarization contrast ratio beyond the maximum field enhancement is observed and explained quantitatively.