Light modes in thin polyurethane and LiF films

Hornauer, D.-L.; Raether, H.

doi:10.1016/0030-4018(73)90037-0

Cited by 30 publications

(3 citation statements)

References 6 publications

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“…The spread Ag in the gaps of nanocrowns arranged periodically and increased the roughness at the interface of Ag and PMMA, which reduced the light reflection. [36][37][38] However, in type I mode, the strong reflection causes a low light coupling efficiency. Accordingly, a weaker SERS intensity was observed in type I mode.…”

Section: Discussion About the Detection Modementioning

confidence: 99%

Surface-enhanced Raman scattering on a hierarchical structural Ag nano-crown array in different detection ways

Wang

et al. 2015

Phys. Chem. Chem. Phys.

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A highly ordered Ag nano-crown array with a hierarchical pattern is designed as a three-dimensional (3D) surface-enhanced Raman scattering (SERS) substrate. It was achieved by depositing Ag on a patterned polymethyl methacrylate (PMMA) film which precisely replicates the patterns of a honeycomb-like anodic aluminum oxide (AAO) template. We made a detailed analysis on the structure of Ag nano-crowns and place emphasis on the detection mode to optimize the excitation and collection of the SERS signals. Finite-different time-domain (FDTD) simulation was performed to confirm and compare electric field enhancement in the gaps between nano-crowns in two different detection ways. All the results exposed and confirmed that the unique detection way of the Ag nano-crown substrate which is different from the traditional mode is optimal. This hierarchical structural Ag nano-crown not only has satisfactory repeatability, but also provides high sensitivity which was supported by the high electric field enhancement in the proper detection way. As a practical application, the detection of pesticide thiram was achieved with a limit of detection down to 1.0 × 10(-14) M. This hierarchical structural Ag nano-crown array on a polymer film is a promising candidate as a portable SERS chip.

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Section: Discussion About the Detection Modementioning

confidence: 99%

Surface-enhanced Raman scattering on a hierarchical structural Ag nano-crown array in different detection ways

Wang

et al. 2015

Phys. Chem. Chem. Phys.

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“…Hence, at higher θ, the ratio ( Z p / Z d ) of the analyte thickness Z p = ( d PDDA + d DNA ) N to the decay length of the SPP evanescent field Z d decreases (Figure C, inset), resulting in a smaller Δλ. The relationship between Δλ and N can be numerically calculated by solving the characteristic equation Z p 2 π λ false( ε eff − ε SPP false) 1 / 2 − arctan true[ ε eff ε d true( ε SPP − ε d ε eff − ε SPP true) 1 / 2 true] − arctan true[ ε eff ε m true( ε SPP − ε m ε eff − ε SPP true) 1 / 2…”

mentioning

confidence: 99%

Using the Angle-Dependent Resonances of Molded Plasmonic Crystals To Improve the Sensitivities of Biosensors

Gao¹,

Yang²,

Lin³

et al. 2010

Nano Lett.

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This paper describes how angle-dependent resonances from molded plasmonic crystals can be used to improve real-time biosensing. First, an inexpensive and massively parallel approach to create single-use, two-dimensional metal nanopyramidal gratings was developed. Second, although constant in bulk dielectric environments, the sensitivities (resonance wavelength shift and resonance width) of plasmonic crystals to adsorbed molecular layers of varying thickness were found to depend on incident excitation angle. Third, protein binding at dilute concentrations of protein was carried out at an angle that optimized the signal to noise of our plasmonic sensing platform. This angle-dependent sensitivity, which is intrinsic to grating-based sensors, is a critical parameter that can assist in maximizing signal to noise.

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“…(a): A, ~LIF=OA; B, 200A; C, 500A; D looOK; E, CO. (b): A, d~is=2000A; B, 3000A; C, 4000A; D, 6000 A.the LiF film. The dispersion of the p-polarized modes with frequency w is given by (seeHornauer and Raether 1973)…”

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confidence: 99%

Resonance anomalies in the light intensity reflected at silver gratings with dielectric coatings

Pockrand¹

1976

J. Phys. D: Appl. Phys.

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The intensity of p-polarized light specularly reflected at silver gratings with LiF coatings of varying thickness was investigated. The influence of the groove depth of the modulated silver surface and the thickness of the LiF coating on the resonance anomalies in the reflected light intensity was determined experimentally. The characteristic behaviour of these anomalies is explained by the properties of the optical eigen-oscillations (surface plasma oscillations and guided light modes) in the layer system.

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Light modes in thin polyurethane and LiF films

Cited by 30 publications

References 6 publications

Surface-enhanced Raman scattering on a hierarchical structural Ag nano-crown array in different detection ways

Surface-enhanced Raman scattering on a hierarchical structural Ag nano-crown array in different detection ways

Using the Angle-Dependent Resonances of Molded Plasmonic Crystals To Improve the Sensitivities of Biosensors

Resonance anomalies in the light intensity reflected at silver gratings with dielectric coatings

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