Paper
14 March 2005 Second-harmonic generation from an array of subwavelength metal apertures
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Abstract
We demonstrate the generation of second-harmonic radiation in transmission through periodic and disordered arrays of sub-wavelength metallic apertures. For circular apertures in a square lattice, the second-harmonic signal peaks at incidence angles corresponding to enhanced transmission of the fundamental beam of 800~nm wavelength except at small incidence angles where the local symmetry minimizes the effective second-order nonlinear susceptibility of the apertures. Even though the linear transmission of the fundamental beam can be more than five times greater through the periodic array as compared to a disordered array, the strength of the second harmonic from the disordered array is greater at large incidence angles. By breaking the local symmetry through the use of apertures of non-centrosymmetric shape, the second-harmonic output occurs at fundamental transmission resonances at small incidence angles.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Marc B. Airola and Steve Blair "Second-harmonic generation from an array of subwavelength metal apertures", Proc. SPIE 5736, Nanomanipulation with Light, (14 March 2005); https://doi.org/10.1117/12.591651
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Cited by 5 scholarly publications and 4 patents.
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KEYWORDS
Metals

Second-harmonic generation

Surface plasmons

Harmonic generation

Nonlinear optics

Signal generators

Femtosecond phenomena

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