Second harmonic generation from nanoslits in metal substrates: applications to palladium-based H2 sensor

We conducted a theoretical investigation of second harmonic generation and other nonlinear features that result from the magnetic Lorentz force, when a single aperture is cut on a thick, opaque palladium substrate. We studied the dependences of linear pump transmission and second harmonic generation...

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Bibliographic Details
Published in:Journal of nanophotonics 2008, Vol.2 (1), p.21851
Main Author: Vincenti, Maria Antonietta
Format: Article
Language:English
Subjects:
Devices
Nanocomposites
Nanomaterials
Nanostructure
Nonlinearity
Palladium
Pumps
Second harmonic generation
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Summary:We conducted a theoretical investigation of second harmonic generation and other nonlinear features that result from the magnetic Lorentz force, when a single aperture is cut on a thick, opaque palladium substrate. We studied the dependences of linear pump transmission and second harmonic generation near resonance conditions, and explored the different physical mechanisms and their dependences, for example, geometrical features. We found that it is possible to exploit field localization and surface plasmon generation to enhance second harmonic generation in the regime of extraordinary transmittance of the pump field. Both transmitted and backward second harmonic generation conversion efficiencies were investigated. The results reveal that it may be possible to access several potential new applications. In particular, we demonstrated that the exploitation of a combination of nonlinear effects and enhanced transmission makes possible a palladium-based device suitable for H2-leak-detection.
ISSN:1934-2608
1934-2608
DOI:10.1117/1.3005971