Journal
NANO LETTERS
Volume 14, Issue 11, Pages 6660-6665Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl503332f
Keywords
Plasmonic nano-oligomer; ZnO nanowire; field enhancement; photonic-plasmonic coupling; second harmonic generation (SHG)
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Funding
- Universidad de Buenos Aires [20020100100719]
- ANPCyT (Prestamo BID PICT) [2010-00825, 2010-00400]
- Leverhulme Trust
- Active Plasmonics Programme of the U.K. Engineering and Physical Sciences Research Council (EPSRC)
- Engineering and Physical Sciences Research Council [EP/H000917/2] Funding Source: researchfish
- EPSRC [EP/H000917/2] Funding Source: UKRI
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We introduce a plasmonic-semiconductor hybrid nanosystem, consisting of a ZnO nanowire coupled to a gold pentamer oligomer by crossing the hot-spot. It is demonstrated that the hybrid system exhibits a second harmonic (SH) conversion efficiency of similar to 3 x 10(-5)%, which is among the highest values for a nanoscale object at optical frequencies reported so far. The SH intensity was found to be similar to 1700 times larger than that from the same nanowire excited outside the hot-spot. Placing high nonlinear susceptibility materials precisely in plasmonic confined-field regions to enhance SH generation opens new perspectives for highly efficient light frequency up-conversion on the nanoscale.
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