Nonlinear Optical Properties of Core-Shell Nanocavities for Enhanced Second-Harmonic Generation

Ye Pu, Rachel Grange, Chia-Lung Hsieh, and Demetri Psaltis
Phys. Rev. Lett. 104, 207402 – Published 19 May 2010
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Abstract

A nonlinear optical plasmonic core-shell nanocavity is demonstrated as an efficient, subwavelength coherent light source through second-harmonic generation. The nonlinear optical plasmonic nanocavity incorporates a noncentrosymmetric medium, which utilizes the entire mode volume for even-order nonlinear optical processes. In previous plasmonic nanocavities, enhancement of such processes was only possible at the interface but symmetry prohibited in the body. We measured an enhancement of over 500 times in the second-harmonic radiation power. Calculations show that an enhancement of over 3500 times is achievable.

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  • Received 7 January 2010

DOI:https://doi.org/10.1103/PhysRevLett.104.207402

©2010 American Physical Society

Authors & Affiliations

Ye Pu1,*, Rachel Grange1, Chia-Lung Hsieh1,2, and Demetri Psaltis1

  • 1Optics Laboratory, School of Engineering, École Polytechnique Fédérale de Lausanne (EPFL), BM 4.107, Station 17, CH-1015 Lausanne, Switzerland
  • 2Department of Electrical Engineering, California Institute of Technology, 1200 East California Boulevard, MC 136-93, Pasadena, California 91125, USA

  • *ye.pu@epfl.ch

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Vol. 104, Iss. 20 — 21 May 2010

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