1981
DOI: 10.1103/physrevb.24.649
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Local fields at the surface of noble-metal microspheres

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Cited by 379 publications
(315 citation statements)
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“…(17) and all other symbols are as defined before. By way of compa~ison, the CARS output from an areaJtof a smooth surface is x sece sin 8 e. (25) Here the local-field factors are given by Eq. (7).…”
Section: Discussionmentioning
confidence: 99%
“…(17) and all other symbols are as defined before. By way of compa~ison, the CARS output from an areaJtof a smooth surface is x sece sin 8 e. (25) Here the local-field factors are given by Eq. (7).…”
Section: Discussionmentioning
confidence: 99%
“…Due to the presence of the gold caps, there is still some enhancement of the Raman scattered signal and the strongest signal enhancement is produced when the 514 nm excitation wavelength is used (measurement results obtained with the 488 nm and 633 nm wavelengths are not shown here). This observation corresponds to theoretical calculations [24,25] which state that gold nanoparticles with diameters of~30-80 nm give a slightly better enhancement in the green than in the red spectral region, where we assume that the resonance behavior of the CV molecules are similar for the 514 nm and 633 nm excitation wavelengths. [36] As we compare .…”
Section: Bare Gold Caps Smooth and Thin Silver Coatings And Rough Wmentioning
confidence: 96%
“…The spectrum ( Figure 5) that corresponds to the 633 nm excitation light has intentionally been shifted upwards for better visibility and has been cut off at 1220 cm À1 as the detector shows some etalon-like interference artifacts below this wavenumber that obscure the SERS signals. According to theory [24,25] and experimental results, the most intense SERS signal is produced when the green 514 nm emission line of the Ar + -ion laser is used. The sharp peak at~521 cm À1 corresponds to the first order silicon Raman signal that originates from the silicon NWs and the silicon substrate.…”
Section: Bare Gold Caps Smooth and Thin Silver Coatings And Rough Wmentioning
confidence: 99%
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“…The main result of this investigation is a selective absorption of light by small particles, for some frequencies which, thereafter, were associated with the frequencies of the "spherical" plasmons [2][3][4]. Recently, the subject enjoys a great deal of interest, in connection with plasmons and polaritons in structures with restricted geometry, their role in the diffraction of the electromagnetic wave and a possible enhancement of the scattered field [5][6][7][8][9][10][11][12][13][14][15]. The physics underlying such phenomena is entangled in the original Mie's results with the mathematical complexity of the problem.…”
Section: Introductionmentioning
confidence: 99%