Show simple item record Nikiforov, MP Kehr, SC Park, TH Milde, P Zerweck, U Loppacher, C Eng, LM Therien, MJ Engheta, N Bonnell, D 2011-04-15T16:46:38Z 2009-12-28
dc.identifier.citation Journal of Applied Physics, 2009, 106 (11)
dc.identifier.issn 0021-8979
dc.description.abstract The idealized system of an atomically flat metallic surface [highly oriented pyrolytic graphite (HOPG)] and an organic monolayer (porphyrin) was used to determine whether the dielectric function and associated properties of thin films can be accessed with scanning-near-field scanning optical microscopy (s-NSOM). Here, we demonstrate the use of harmonics up to fourth order and the polarization dependence of incident light to probe dielectric properties on idealized samples of monolayers of organic molecules on atomically smooth substrates. An analytical treatment of light/sample interaction using the s-NSOM tip was developed in order to quantify the dielectric properties. The theoretical analysis and numerical modeling, as well as experimental data, demonstrate that higher order harmonic scattering can be used to extract the dielectric properties of materials with tens of nanometer spatial resolution. To date, the third harmonic provides the best lateral resolution (∼50 nm) and dielectric constant contrast for a porphyrin film on HOPG. © 2009 American Institute of Physics.
dc.language.iso en_US en_US
dc.relation.ispartof Journal of Applied Physics
dc.relation.isversionof 10.1063/1.3245392
dc.title Probing polarization and dielectric function of molecules with higher order harmonics in scattering-near-field scanning optical microscopy
dc.type Journal Article
dc.description.version Version of Record en_US 2009-12-1 en_US
duke.description.endpage 114307 en_US
duke.description.issue 11 en_US
duke.description.startpage 114307 en_US
duke.description.volume 106 en_US
dc.relation.journal Journal of Applied Physics en_US
pubs.issue 11
pubs.organisational-group /Duke
pubs.organisational-group /Duke/Pratt School of Engineering
pubs.organisational-group /Duke/Pratt School of Engineering/Biomedical Engineering
pubs.organisational-group /Duke/School of Medicine
pubs.organisational-group /Duke/School of Medicine/Institutes and Centers
pubs.organisational-group /Duke/School of Medicine/Institutes and Centers/Duke Cancer Institute
pubs.organisational-group /Duke/Trinity College of Arts & Sciences
pubs.organisational-group /Duke/Trinity College of Arts & Sciences/Chemistry
pubs.publication-status Published
pubs.volume 106

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