Sum frequency generation spectroscopy of thin organic films on silver using visible surface plasmon generation

Alieva, E. V.; Kuzik, L. A.; Yakovlev, V. A.

doi:10.1016/s0009-2614(98)00738-6

Cited by 18 publications

(12 citation statements)

References 10 publications

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“…The resonant part of the SFG signal constitutes the fingerprint of the film as it depends on the vibrational bands of the surface species. The procedure of getting the SFG spectra from the experimental data had been described in detail in [7,8]. The SFG spectra of the copper phthalocyanine films of different thicknesses are presented in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…2a. Squares and circles are the experimental points for 5 and 8 nm thick films, the line shows the best fit of the SFG spectrum of the 10 nm film [7] by a set of Gauss contours. These spectra include all main features of the reflection±absorption spectra shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…Silver is the most suitable metal for the enhancement of the electromagnetic field in the interfacial layers due to the smallest electromagnetic losses in visible spectral region. In our first experiments on the thin film SFG spectroscopy we have obtained the vibrational spectra of the centrosymmetric copper phthalocyanine [7] and fullerene [8] films on silver exhibiting both infrared and Raman active bands. This result showed the lack of the inversion symmetry either in the interfacial layer or on the whole film.…”

Section: Introductionmentioning

confidence: 99%

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Sum-Frequency Generation Spectra of Thin Organic Films on Silver Enhanced Due to Surface Plasmon Excitation

Alieva

Knippels

Kuzik

et al. 1999

phys. stat. sol. (a)

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We have studied vibrational spectra of thin films of copper phthalocyanine and fullerene of different thicknesses on silver obtained by a visible‐infrared sum‐frequency generation (SFG). The free electron laser FELIX was used as a source of broadband infrared and the pulsed Nd:YLF laser system as a source of visible radiation. Excitation of a surface plasmon on silver has allowed to enhance the efficiency of the SFG process. The SFG signal has appeared to be almost independent of the film thickness demonstrating the exclusive contribution of the interfacial layer to the SFG signal.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Sum-Frequency Generation Spectra of Thin Organic Films on Silver Enhanced Due to Surface Plasmon Excitation

Alieva

Knippels

Kuzik

et al. 1999

phys. stat. sol. (a)

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“…[9,21,25,26] In this paper we consider the most common choice of light polarizations, ssp, corresponding to a single element of the susceptibility tensor, χ…”

Section: A Simplified View Of Sfg Susceptibilitymentioning

confidence: 99%

Toward a Simple Molecular Understanding of Sum Frequency Generation at Air−Water Interfaces

2009

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Second-order vibrational spectroscopies successfully isolate signals from interfaces, but they report on intermolecular structure in a complicated and indirect way. Here we adapt a perspective on vibrational response developed for bulk spectroscopies to explore the microscopic fluctuations to which sum frequency generation (SFG), a popular surface-specific measurement, is most sensitive.We focus exclusively on inhomogeneous broadening of spectral susceptibilities for OH stretching of HOD as a dilute solute in D 2 O. Exploiting a simple connection between vibrational frequency shifts and an electric field variable, we identify several functions of molecular orientation whose averages govern SFG. The frequency-dependence of these quantities is well captured by a pair of averages, involving alignment of OH and OD bonds with the surface normal at corresponding values of the electric field. The approximate form we obtain for SFG susceptibility highlights a dramatic sensitivity to the way a simulated liquid slab is partitioned for calculating second-order response.

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“…Therefore, SFG is the only intrinsic surface‐specific vibrational spectroscopy and has contributed to the achievement of significant progress in the study of interfacial conformation and thin films . The coupling of SFG with plasmonic resonances to enhance the vibrational response of interfacial materials has been demonstrated for propagating surface plasmon resonances (SPR) excited in total internal reflection configuration, and for spherical and plate‐shape nanoparticles excited by localized surface plasmon resonance (LSPR) . In those works, the total SFG intensity is enhanced by a factor of several tens.…”

Section: Introductionmentioning

confidence: 99%

Selective Plasmonic Platforms Based on Nanopillars to Enhance Vibrational Sum‐Frequency Generation Spectroscopy

Lis

Caudano

Henry

et al. 2013

Advanced Optical Materials

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The enhancement of the vibrational sum-frequency generation (SFG) signal from molecules adsorbed on metallic nanopillars excited at a resonance frequency matching their localized surface plasmons is reported. The nanopillars stand vertically on a metal surface and possess two plasmon modes that can be selectively excited by either the incident visible laser beam, or the generated SFG beam itself. This nanostructured platform increases the molecular SFG signal of a monolayer by two orders of magnitude. The localization and the geometry of the two plasmon modes enables to probe the molecules adsorbed onto the vertical nanopillar wall, or on the top of it, or on the fl at surface between the pillars, selectively. In practice, this spatial selectivity is set by switching the polarization of the visible and SFG beams at resonance. Owing to the largely improved sensitivity combined with a specifi c spatial selectivity, plasmon-enhanced SFG boosts the versatility of second-order vibrational SFG spectroscopy or microscopy. This makes them promising platforms in the development of analytical molecular devices. 245SFG measurement alignment procedure and the data reproducibility are discussed. Complementary SFG spectra at different wavelengths are also provided.

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Sum frequency generation spectroscopy of thin organic films on silver using visible surface plasmon generation

Cited by 18 publications

References 10 publications

Sum-Frequency Generation Spectra of Thin Organic Films on Silver Enhanced Due to Surface Plasmon Excitation

Sum-Frequency Generation Spectra of Thin Organic Films on Silver Enhanced Due to Surface Plasmon Excitation

Toward a Simple Molecular Understanding of Sum Frequency Generation at Air−Water Interfaces

Selective Plasmonic Platforms Based on Nanopillars to Enhance Vibrational Sum‐Frequency Generation Spectroscopy

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