Visible–Infrared Difference Frequency Generation at CN— Covered Au

Mochán, W. Luis; Maytorena, Jesús A.; Mendoza, Bernardo S.

doi:10.1002/(sici)1521-396x(199812)170:2<357::aid-pssa357>3.0.co;2-f

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…where ( = i j k x y z , , , , ), w 1 and w 2 are the pump frequencies within the incident fundamental pulse bandwidth, w w w = - ( ) ( ) [41]. We use equation (6) to evaluate the polarization at the lower ( < P x z , ) and upper ( > P x z , ) interfaces of the thin film as we show in the appendix.…”

Section: Theorymentioning

confidence: 99%

Giant spectral transformations in plasmon-enhanced difference-frequency generation with polychromatic light

Che

Ponomarenko

Čada

2016

J. Opt.

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We theoretically study the generation of mid-infrared light through difference-frequency excitation using a single dual-wavelength coherent femtosecond laser source. The differencefrequency wave is generated from the surface of a thin gold film in the Kretschmann coupling geometry due to the surface nonlinearity of the film. We show a clear enhancement of the difference-frequency wave around the surface plasmon polariton coupling angle of the incident fundamental wave. We also show an enormous shift and modification of the differencefrequency spectrum near surface plasmon resonance. We discuss the discovered spectral change dependence on the source pulse duration and incidence angle of the fundamental wave. Our findings have an enormous potential for use in difference-frequency surface sensing and spectroscopy applications.

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Section: Theorymentioning

confidence: 99%

Giant spectral transformations in plasmon-enhanced difference-frequency generation with polychromatic light

Che

Ponomarenko

Čada

2016

J. Opt.

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Visible-infrared sum and difference frequency generation at adsorbate-covered Au

1999

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We develop a model for sum and difference frequency generation ͑SFG/DFG͒ at the interface of an isotropic centrosymmetric nonsimple metal covered by a noncentrosymmetric adsorbate. We separate the nonlinear response of the surface into a free-electron contribution that characterizes the intraband transitions, a boundelectron contribution that characterizes the interband transitions, and a cross term due to the interaction among free and bound electrons. For the former we introduce an adjustable parameter consistent with semi-infinite jellium calculations, whereas for the others we apply a screened dipollium model that gives the nonlinear response in terms of the bound-and free-electron contributions to the substrate's bulk dielectric function. The nonlinear response of the adsorbate is described through the Raman and IR response of its stretch mode. We calculate SFG/DFG spectra for a CN Ϫ covered Au-electrolyte interface choosing the direction of the dipole moment of the adsorbate either toward or away from the surface. The interference between the substrate's and overlayer's responses allows the extraction of orientational information from a comparison of our model calculations to recently obtained experimental spectra. ͓S0163-1829͑99͒12935-7͔

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Vibrational spectroscopy of interfaces by infrared–visible sum frequency generation

Buck¹,

Himmelhaus²

2001

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

251

293

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Visible–Infrared Difference Frequency Generation at CN— Covered Au

Cited by 3 publications

References 27 publications

Giant spectral transformations in plasmon-enhanced difference-frequency generation with polychromatic light

Giant spectral transformations in plasmon-enhanced difference-frequency generation with polychromatic light

Visible-infrared sum and difference frequency generation at adsorbate-covered Au

Vibrational spectroscopy of interfaces by infrared–visible sum frequency generation

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