Theory of surface plasmons and surface-plasmon polaritons

Reports on Progress in Physics (Impact Factor: 17.06). 11/2006; 70(1). DOI: 10.1088/0034-4885/70/1/R01
Source: arXiv


Collective electronic excitations at metal surfaces are well known to play a key role in a wide spectrum of science, ranging from physics and materials science to biology. Here we focus on a theoretical description of the many-body dynamical electronic response of solids, which underlines the existence of various collective electronic excitations at metal surfaces, such as the conventional surface plasmon, multipole plasmons, and the recently predicted acoustic surface plasmon. We also review existing calculations, experimental measurements, and applications. Comment: 54 pages, 33 figures, to appear in Rep. Prog. Phys

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Available from: V. M. Silkin, Jan 15, 2014
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    • "In addition, the SPR sensing is very practical for numerous biology applications [4] [5]. The SPR arises from the interaction of light with free electrons at a metal-dielectric interface [6]. Under certain conditions, the collective oscillations of free electrons, called surface plasmons (SPs), can be optically excited at that interface by the attenuated total reflection (ATR). "
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    ABSTRACT: A two-step spectral interferometric technique is used to measure a surface plasmon resonance (SPR) phase difference from the spectral interferograms recorded in the Kretschmann configuration. The technique employs a polarimetry setup with a white-light source and birefringent crystal and allows one to obtain a channeled spectrum. Two such spectra, one including reflection of p- and s-polarized waves from the SPR structure for air when the SPR phenomenon does not occur in the source spectral range, and the other one for an analyte when the SPR phenomenon occurs, are used to retrieve the wavelength-dependent SPR phase difference. The new method is applied for aqueous solutions of ethanol with different parameters, the concentration of ethanol in water in a range from 0 to 60 weight percent and the refractive index in a range from 1.333 to 1.362. The sensing scheme uses a wavelength interrogation method and the position of a sharp maximum in the spectral derivative of the SPR phase change is measured as a function of the analyte parameter in a range from 644 to 690 nm. In the same setup, the spectral dependence of the ratio between the reflectances of both polarization states is measured as a function of the analyte parameter. It is revealed that the detection accuracy of the interferometric measurements is more than three times higher than that of the polarimetric measurements.
    Optics Communications 11/2015; 354. DOI:10.1016/j.optcom.2015.06.011 · 1.45 Impact Factor
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    • "ω) = (˜ ε(ω)/ε b − 1)/((˜ ε(ω) + ε b ) + ε b ), which in the time domain takes the form g m (t − t ) − (ε ∞ /ε b − 1) (ε ∞ + ε b ) + ε b δ(t − t ) = 4πχ m (t − t ) (5) = 2 + 1 (ε ∞ + ε b ) + ε b ω 2 m ω 2 m − (γ/2) 2 e −γ(t−t )/2 sin ω 2 m − (γ/2) 2 (t − t ) , where ω m = ω p /((ε ∞ + ε b ) + ε b ) are determined by the pole structure of˜g m (ω) [54] [56] "
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    ABSTRACT: Electron energy-loss spectroscopy (EELS) offers a window to view the properties and processes of the nanoscale. When performed in a scanning transmission electron microscope, EELS can simultaneously render images of nanoscale objects with sub-nanometer precision and correlate them with spectroscopic information of $\sim10 - 100$ meV resolution. Consequently, EELS is a near-perfect tool for understanding the optical and electronic properties of individual and few-particle assemblies of plasmonic metal nanoparticles, which are of critical importance in a wide range of fields. This review presents an overview of basic plasmonics and EELS theory and highlights several recent noteworthy experiments involving the electron-beam interrogation of plasmonic metal nanoparticle systems.
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    • "Such waves are basically transverse magnetically polarized surface waves so that they can be resonantly excited only by a p-polarized incident light wave. The field of plasmons decays exponentially in the direction perpendicular to the boundary [4], in the metal as well in the dielectric material. When a specific resonance condition is fulfilled, maximum power of the incident light wave is coupled to the surface plasmons and the power carried by transmitted light wave drops down. "
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    ABSTRACT: A reflection-based fibre-optic refractive index sensor using surface plasmon resonance (SPR) in a thin metal film sputtered on a bare core of a multimode optical fibre is presented. The sensing element of the SPR fibre-optic sensor is the core of a step-index optical fibre made of fused silica with a gold film double-sided sputtered on the whole core surface, including the core end face. Consequently, a terminated reflection-based sensing scheme to measure the refractive indices of liquids is realized. The sensing scheme uses a wavelength interrogation method and the refractive index of a liquid is sensed by measuring the position of the dip in the reflected spectral intensity distribution. As an example, the aqueous solutions of ethanol with refractive indices in a range from 1.333 to 1.363 are measured. In addition, the increase in the sensitivity of the SPR fibre-optic refractive index sensor with the decrease of the fibre sensing length is demonstrated.
    Journal of the European Optical Society Rapid Publications 08/2014; 9. DOI:10.2971/jeos.2014.14033 · 1.23 Impact Factor
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