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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    • "Because of TM-polarized nature these waves can be excited by p-polarized incident light. When the wave vectors of the excitation light and the surface plasmon wave become equal the transfer of energy from the incident wave to the surface plasmon wave occurs, a condition called the resonance condition which depends on the dielectric constant of the dielectric medium apart from other factors [4] [5] [6] [7] [8] [9]. "
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    ABSTRACT: Fabrication and characterization of a surface plasmon resonance (SPR) based fiber optic sensor for the detection of hydrogen sulphide gas have been carried out. Three kinds of probes have been fabricated to optimize the performance of the sensor. These probes have common coating of silver layer over unclad core of the fiber while these have different over-layers of nickel oxide, indium tin oxide and nickel oxide doped indium tin oxide. The SPR spectra of all the probes and hence the resonance wavelengths have been found to shift toward the higher wavelength with the increase in the concentration of the hydrogen sulphide gas around the probe. The shift occurs due to the interaction of the hydrogen sulphide gas with the over-layer resulting in the change in its dielectric function. However, the maximum shift has been obtained in the case of nickel oxide doped indium tin oxide over layer. To achieve the highest sensitivity of the sensor, the thickness of the over-layer and the doping concentration of nickel oxide have been varied and optimized. Further, to test the selectivity, the experiments have been performed on various other gases. It has been found that the nickel oxide doped indium tin oxide probe is highly selective toward hydrogen sulphide gas.
    Sensors and Actuators B Chemical 05/2014; 195:215–222. DOI:10.1016/j.snb.2014.01.045 · 4.10 Impact Factor
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    • "A change in the dielectric medium's refractive index produces a modification in surface plasmon mode propagation. Consequently, the coupling condition between the light wave and surface plasmon wave is altered, which becomes evident as a change in one of the characteristics of the optical wave interacting with the surface plasmon mode313233. "
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    ABSTRACT: Surface plasmon resonance (SPR) is a medical diagnosis technique with high sensitivity and specificity. In this research, a new method based on SPR is proposed for rapid, 10-minute detection of the anti-dengue virus in human serum samples. This novel technique, known as rapid immunoglobulin M (IgM)-based dengue diagnostic test, can be utilized quickly and easily at the point of care. Four dengue virus serotypes were used as ligands on a biochip. According to the results, a serum volume of only 1 μl from a dengue patient (as a minimized volume) is required to indicate SPR angle variation to determine the ratio of each dengue serotype in samples with 83-93% sensitivity and 100% specificity.
    Scientific Reports 01/2014; 4:3851. DOI:10.1038/srep03851 · 5.58 Impact Factor
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