Enhancing the Nonlinear Optical Response Using Multifrequency Gold-Nanowire Antennas

Hayk Harutyunyan, Giorgio Volpe, Romain Quidant, and Lukas Novotny
Phys. Rev. Lett. 108, 217403 – Published 23 May 2012
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Abstract

We introduce and experimentally demonstrate the concept of multifrequency optical antennas that are designed for controlling the nonlinear response of materials. These antennas consist of two arms of different lengths, each resonant with one of the incoming frequencies. They are embedded in a nonlinear medium (indium tin oxide) that acts as a receiver. Because the two arms have different spectral resonances, tuning of the antenna gap size has minimal effect on the linear optical properties. However, it strongly affects the nonlinear response. Thus, by employing antenna elements with different spectral resonances, we provide a strategy to decouple the nonlinear response of nanomaterials from their linear optical properties.

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  • Received 10 November 2011

DOI:https://doi.org/10.1103/PhysRevLett.108.217403

© 2012 American Physical Society

Authors & Affiliations

Hayk Harutyunyan1, Giorgio Volpe2, Romain Quidant2,3, and Lukas Novotny1,*

  • 1Institute of Optics, University of Rochester, Rochester, New York 14627, USA
  • 2ICFO-Institut de Ciencies Fotoniques, Mediterranean Technology Park, 08860 Castelldefels (Barcelona), Spain
  • 3ICREA-Institució Catalana de Recerca i Estudis Avançats, 08010 Barcelona, Spain

  • *www.nano-optics.org

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Issue

Vol. 108, Iss. 21 — 25 May 2012

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