Shaping the Nonlinear Emission Pattern of a Dielectric Nanoantenna by Integrated Holographic Gratings
Date
2018
Authors
Ghirardini, Lavinia
Marino, Giuseppe
Gili, Valerio F.
Favero, Ivan
Rocco, Davide
Carletti, Luca
Locatelli, Andrea
De Angelis, Costantino
Finazzi, Marco
Celebrano, Michele
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American Chemical Society
Abstract
We demonstrate the shaping of the second-harmonic (SH) radiation pattern from a single AlGaAs nanodisk antenna using coplanar holographic gratings. The SH radiation emitted from the antenna toward the—otherwise forbidden—normal direction can be effectively redirected by suitably shifting the phase of the grating pattern in the azimuthal direction. The use of such gratings allows increasing the SH power collection efficiency by 2 orders of magnitude with respect to an isolated antenna and demonstrates the possibility of intensity-tailoring for an arbitrary collection angle. Such reconstruction of the nonlinear emission from nanoscale antennas represents the first step toward the application of all-dielectric nanostructures for nonlinear holography.
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Nano Letters
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Journal article
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2037-12-31