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Nano Lett. 2011 Dec 14;11(12):5519-23. doi: 10.1021/nl2033602. Epub 2011 Nov 11.

Three-dimensional nanostructures as highly efficient generators of second harmonic light.

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  • 1Department of Physics and Astronomy, Rice University, Houston, Texas 77005, United States.


Plasmonic nanostructures enable the generation of large electromagnetic fields confined to small volumes, potentially providing a route for the development of nanoengineered nonlinear optical media. A metal-capped hemispherical nanoparticle, also known as a nanocup, generates second harmonic light with increasing intensity as the angle between the incident fundamental beam and the nanocup symmetry axis is increased. Nanoparticle orientation also modifies the emission direction of the second harmonic light. With conversion efficiencies similar to those of inorganic SHG crystals, these structures provide a promising approach for the design and fabrication of stable, synthetic second-order nonlinear optical materials tailored for specific wavelengths.

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