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Opt Express. 2013 Jun 17;21(12):14159-68. doi: 10.1364/OE.21.014159.

Plasmon-enhanced spectral changes in surface sum-frequency generation with polychromatic light.

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  • 1Department of Electrical and Computer Engineering, Dalhousie University, Halifax, NS, B3J 2X4 Canada.


We theoretically explore the spectral behavior of the fundamental and sum-frequency waves generated from the surface of a thin metal film in the Kretschmann configuration with coherent ultrashort pulses. We show that the spectra of reflected sum-frequency waves exhibit pronounced shifts for the incident fundamental waves close to the plasmon coupling angle. We also demonstrate that the scale of discovered plasmon-enhanced spectral changes is strongly influenced by the magnitude of the incidence angle and the bandwidth of the source spectrum.

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