Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 27, Issue 11, Pages 2405-2409Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.27.002405
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Funding
- National Natural Science Foundation of China (NSFC) [10874239, 10604066, 10947172]
- Hunan Provincial Education Department [90C404]
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Second-harmonic generation (SHG) through a proposed thin gold film with a periodic array of subwavelength nanoholes is numerically investigated. By using a recently developed microscopic classical theory and a full-vectorial three-dimensional finite-difference time-domain method, we demonstrate that the mirror symmetry of nanoholes in one direction restricts the polarization state of second-harmonic emission in the same direction. Numerical results show that the second-order nonlinear susceptibility chi((2))(yyy) dominates in the process of SHG when the nanoholes possess mirror symmetry in the x-axis direction. It is also found that the surface plasmon resonance can result in the enhancement of SHG from metallic nanoholes. (C) 2010 Optical Society of America
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