Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/35737
Title: Plasmon gap mode-assisted third-harmonic generation from metal film-coupled nanowires
Authors: Li, K
Li, XF
Lei, DY 
Wu, SL
Zhan, YH
Issue Date: 2014
Publisher: American Institute of Physics
Source: Applied physics letters, 2014, v. 104, no. 26, 261105 How to cite?
Journal: Applied physics letters 
Abstract: A numerical investigation on the third-order nonlinear optical properties of a plasmonic system composed by metal film-coupled nanowires is reported. The linear and nonlinear optical characteristics are studied by finite-difference time-domain (FDTD) method. To substantially improve the nonlinear effect, the geometric parameters of the system are carefully engineered to excite strong plasmon gap resonance with dramatically enhanced electric field intensity at the gap between the nanowires and the film. The third-harmonic generation (THG) property is examined by nonlinear FDTD simulation. It shows that the THG efficiency estimated from the nonlinear optical absorption can be similar to 1 x 10(-5) under an incident power density of 5.2 GW/cm(2). Plasmonic resonance is necessary to achieve highly efficient THG since the system on resonance shows the THG intensity 4 orders of magnitude higher than that of an off-resonance system.
URI: http://hdl.handle.net/10397/35737
ISSN: 0003-6951 (print)
1077-3118 (online)
DOI: 10.1063/1.4886409
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