@article{Aouani:2014:10.1038/NNANO.2014.27,
author = {Aouani, H and Rahmani, M and Navarro-Cia, M and Maier, SA},
doi = {10.1038/NNANO.2014.27},
journal = {Nature Nanotechnology},
pages = {290--294},
title = {Third-harmonic-upconversion enhancement from a single semiconductor nanoparticle coupled to a plasmonic antenna},
url = {http://dx.doi.org/10.1038/NNANO.2014.27},
volume = {9},
year = {2014}
}

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TY  - JOUR
AB  - The ability to convert low-energy quanta into a quantum of higher energy is of great interest for a variety of applications, including bioimaging1, drug delivery2 and photovoltaics3. Although high conversion efficiencies can be achieved using macroscopic nonlinear crystals, upconverting light at the nanometre scale remains challenging because the subwavelength scale of materials prevents the exploitation of phase-matching processes4. Light–plasmon interactions that occur in nanostructured noble metals have offered alternative opportunities for nonlinear upconversion of infrared light, but conversion efficiency rates remain extremely low due to the weak penetration of the exciting fields into the metal5. Here, we show that third-harmonic generation from an individual semiconductor indium tin oxide nanoparticle is significantly enhanced when coupled within a plasmonic gold dimer. The plasmonic dimer acts as a receiving optical antenna6, confining the incident far-field radiation into a near field localized at its gap; the indium tin oxide nanoparticle located at the plasmonic dimer gap acts as a localized nonlinear transmitter upconverting three incident photons at frequency ω into a photon at frequency 3ω. This hybrid nanodevice provides third-harmonic-generation enhancements of up to 106-fold compared with an isolated indium tin oxide nanoparticle, with an effective third-order susceptibility up to 3.5 × 103 nm2 V−2 and conversion efficiency of 0.0007%. We also show that the upconverted third-harmonic emission can be exploited to probe the near-field intensity at the plasmonic dimer gap.
AU  - Aouani,H
AU  - Rahmani,M
AU  - Navarro-Cia,M
AU  - Maier,SA
DO  - 10.1038/NNANO.2014.27
EP  - 294
PY  - 2014///
SN  - 1748-3387
SP  - 290
TI  - Third-harmonic-upconversion enhancement from a single semiconductor nanoparticle coupled to a plasmonic antenna
T2  - Nature Nanotechnology
UR  - http://dx.doi.org/10.1038/NNANO.2014.27
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000334068800015&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/19618
VL  - 9
ER  - 

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