Journal
OPTICS LETTERS
Volume 35, Issue 23, Pages 4063-4065Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.35.004063
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Funding
- French Agence Nationale de la Recherche [ANR JC 2007, JC07-195504]
- ERC [227577]
- European Research Council (ERC) [227577] Funding Source: European Research Council (ERC)
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We demonstrate the ability of single-subwavelength-size nanoapertures fabricated in a gold metal thin film to enhance second-harmonic generation (SHG) as compared to a bare metal film. Nonlinear microscopy imaging with polarization resolution is used to quantify the SHG enhancement in circular and triangular nanoaperture shapes. The dependence of the measured SHG enhancement on circular aperture diameters is seen to originate from both phase retardation effects and field enhancements at the nanoaperture edge. Triangular nanoapertures exhibit superior SHG enhancement compared with circular ones, as expected from their noncentrosymmetric shape. (C) 2010 Optical Society of America
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