Enhanced Raman Scattering from Benzene Condensed on a Silver Grating

Arnold, Michael; Bussemer, P.; Hehl, K.; Grabhorn, H.; Otto, A.

doi:10.1080/09500349214552341

Cited by 24 publications

(8 citation statements)

References 25 publications

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“…Therefore Grewe 24 measured SERS of C 2 H 4 under regulated dynamic C 2 H 4 pressures in the UHV system and regulated temperatures of the Cu substrate above 90 K. During cooling down of the sample from 110 to 80 K, the N‐bands are clearly distinguishable at 90 K. Since the adsorbate is in dynamic equilibrium with the gas phase, it is very unlikely that there is a second layer of C 2 H 4 formed under these conditions. The wavenumber position of the ν 3 Raman band of C 2 H 4 adsorbates on Cu(111) does agree with the position of the N‐band, as could be demonstrated from the Raman signal of an optical grating covered with a Cu film evaporated at 310 K, annealed to 350 K, cooled to 40 K, and exposed to 1–1.5 L of C 2 H 4 (in this case, the enhancement is exclusively due to local plasmon‐polariton field enhancement) 28 . For silver films under similar conditions, the (111) orientation with azimuthal randomness was confirmed by X‐ray scattering, which most likely also holds for the copper films on the grating.…”

Section: The Firm Relation Between the Raman Scattering Backgrousupporting

confidence: 58%

Normal Bands in Surface‐Enhanced Raman Scattering (SERS) and Their Relation to the Electron‐Hole Pair Excitation Background in SERS

Otto

Akemann

Pucci

2006

Israel Journal of Chemistry

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Normal bands in SERS are bands of Raman‐active vibrations of adsorbates in the first layer, whose frequency is not shifted with respect to the condensed species. Here we show the experimental result, that the intensity of the N‐bands of C2H4 on cold‐deposited copper films in ultrahigh vacuum scales with the intensity of the broadband background of the SERS spectra at the frequency position of the N‐bands. This is demonstrated by changing the background by temperature annealing of the Cu film. Changing the laser wavelength proves that the background is Raman scattering by electron‐hole pair excitations. A simple model including electron scattering by surface roughness can explain the spectral shape of the background and the scaling of the N‐bands with the background. Probably we also can explain the appearance of the N‐bands in surface‐enhanced infrared absorption (SEIRA) within this model.

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Section: The Firm Relation Between the Raman Scattering Backgrousupporting

confidence: 58%

Normal Bands in Surface‐Enhanced Raman Scattering (SERS) and Their Relation to the Electron‐Hole Pair Excitation Background in SERS

Otto

Akemann

Pucci

2006

Israel Journal of Chemistry

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“…The grating period was 500 nm, the amplitude was 20 to 30 nm [24]. The size of the Ag electrode was 2 Â 2 mm 2 .…”

Section: Methodsmentioning

confidence: 99%

Sensitive Linear Surface Optics with Metal–Insulator–Metal Tunnel Contacts

Otto

Diesing

Schatteburg

et al. 1999

phys. stat. sol. (a)

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Aluminium–aluminiumoxide–silver tunnel junctions allow to measure light emission by hot electrons and internal photoemission. Adsorption of potassium or oxygen on the silver electrode increases or quenches the light emission considerably. The light intensity increases at negative surface charge on the silver electrode and is suppressed at positive surface charge. Surprisingly, the light emission by hot electrons within the optical skin depth is negligible. The observed intensity is assigned to electron–photon coupling at the surface, especially to inverse photoemission by hot electrons via the time inverted threshold effect postulated by A. Liebsch. This is not in contradiction to time resolved two photon photoemission experiments. Internal photoemission experiments corroborate this interpretation.

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“…Propagating surface plasmons excited with the gratings are accompanied by enhanced electric fields near their corrugated surfaces, at which Raman signals from target analytes are amplified. [20][21][22] When 2-D gratings are used in Raman sensing, which is our interest, the use of circular polarization is reasonable, because the optical responses of a spectrometer are usually subject to the polarization of the input signals. In that case, the SPR dips at all orientations would be averaged out, suggesting that using the dip depth or the dip wavelength as a measure of the target molecules would be problematic.…”

Section: Discussionmentioning

confidence: 99%

Ultraviolet laser writing system based on polar scanning strategy to produce subwavelength metal gratings for surface plasmon resonance

Amako

Fujii

2013

Opt. Eng

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Abstract. We demonstrate the use of ultraviolet (UV) laser lithography in the production of subwavelength metal gratings. A laser writing system with a 413-nm Kr laser is used to write patterns on a resist-coated fused silica substrate mounted on a rotating table with a linear slider. One-and two-dimensional patterns are written in the resist at a selected sampling pitch or grating period, and the substrate is dry etched and coated with Au to obtain metallized gratings. Surface plasmon resonance dips, which appear in the reflectance spectra of the gratings, shift depending on the orientation of the incident polarization, because the gratings lack perfect symmetry owing to a system-induced skew in the writing beam. This dip shift can be considered tolerable when the gratings are used as a signal enhancer in Raman sensing applications. We conclude that UV laser writing based on polar coordinates is a candidate method for surface structuring on submicron scales. Devising a method to attain an unskewed beam will be the subject of future work. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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Enhanced Raman Scattering from Benzene Condensed on a Silver Grating

Cited by 24 publications

References 25 publications

Normal Bands in Surface‐Enhanced Raman Scattering (SERS) and Their Relation to the Electron‐Hole Pair Excitation Background in SERS

Normal Bands in Surface‐Enhanced Raman Scattering (SERS) and Their Relation to the Electron‐Hole Pair Excitation Background in SERS

Sensitive Linear Surface Optics with Metal–Insulator–Metal Tunnel Contacts

Ultraviolet laser writing system based on polar scanning strategy to produce subwavelength metal gratings for surface plasmon resonance

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