Surface-enhanced second-harmonic generation at a metallic grating

Agarwal, G. S. ; Jha, Sudhanshu S. (1982) Surface-enhanced second-harmonic generation at a metallic grating Physical Review B, 26 (2). pp. 482-496. ISSN 0163-1829

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The theory of surface-enhanced second-harmonic generation at a metallic grating is developed. Using the form of the nonlinear source polarization given by Bloembergen et al. [Phys. Rev. 174, 813 (1968)], we solve Maxwell's equations to obtain the fields at the second-harmonic frequency. The calculations are done up to second order in the surface-roughness parameter. These perturbation expressions are used to evaluate numerically the second-harmonic intensity, in various directions, produced by a plane wave incident on a metallic grating. The resonant enhancement in the second-harmonic intensity due to surface-plasmon excitation at fundamental frequency ω is discussed and the results compared with some recent experimental observations. The second-harmonic fields are also shown to get enhancement due to excitation of surface plasmons at 2ω; these, however, correspond to local-field enhancements at 2ω and are evanescent in nature.

Item Type:Article
Source:Copyright of this article belongs to American Physical Society.
ID Code:13855
Deposited On:12 Nov 2010 14:36
Last Modified:16 May 2016 22:56

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