Theory of surface plasmons and surface-plasmon polaritons

Universidad del País Vasco / Euskal Herriko Unibertsitatea, Leioa, Basque Country, Spain
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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    • "There the reader will find detailed historical overviews of the theoretical and experimental accomplishments of the field. From a theoretical point of view, LSP and EELS theory can be quite complex [55]. Rather than repeat what has already been done elsewhere, we narrow our focus and model in detail a prototypical LSP STEM/EELS experiment with hopes of giving researchers new to the field an entry point to the vast body of work that already exists. "

    Full-text · Dataset · Jan 2016
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    • "Since Prof. Ritchie firstly predicted that the existence of self-sustained collective oscillations at surface of metallic nanostructure by consideration of energy losses characteristic of fast electrons transmitting across optically thick metallic films in 1957 [1], the collective electron density waves on metal surface known as surface plasmons (SPs) have been of great scientific interest in theoretical and experimental studies [2] [3] [4] [5] [6] [7] [8] [9]. Largely enhancement of the local electromagnetic (EM) field induced by surface plasmon resonance (SPR), which plays an important role in studying SES, including PEF and surface-enhanced Raman scattering (SERS), have the focus of discussions [10] [11] [12] [13]. "
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    ABSTRACT: The optically generated collective electron density waves on metal–dielectric boundaries known as surface plasmons have been of great scientific interest since their discovery. Being electromagnetic waves on gold or silver nanoparticle’s surface, localised surface plasmons (LSP) can strongly enhance the electromagnetic field. These strong electromagnetic fields near the metal surfaces have been used in various applications like surface enhanced spectroscopy (SES), plasmonic lithography, plasmonic trapping of particles, and plasmonic catalysis. Resonant coupling of LSPs to fluorophore can strongly enhance the emission intensity, the angular distribution, and the polarisation of the emitted radiation and even the speed of radiative decay, which is so-called plasmon enhanced fluorescence (PEF). As a result, more and more reports on surface-enhanced fluorescence have appeared, such as SPASER-s, plasmon assisted lasing, single molecule fluorescence measurements, surface plasmoncoupled emission (SPCE) in biological sensing, optical orbit designs etc. In this review, we focus on recent advanced reports on plasmon-enhanced fluorescence (PEF). First, the mechanism of PEF and early results of enhanced fluorescence observed by metal nanostructure will be introduced. Then, the enhanced substrates, including periodical and nonperiodical nanostructure, will be discussed and the most important factor of the spacer between molecule and surface and wavelength dependence on PEF is demonstrated. Finally, the recent progress of tip-enhanced fluorescence and PEF from the rare-earth doped up-conversion (UC) and down-conversion (DC) nanoparticles (NPs) are also commented upon. This review provides an introduction to fundamentals of PEF, illustrates the current progress in the design of metallic nanostructures for efficient fluorescence signal amplification that utilises propagating and localised surface plasmons.
    Preview · Article · Dec 2015 · Nanophotonics
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    • "In the latter case corresponding boundary conditions must be imposed in order to match the components of the field vectors on both sides of the interface. Therefore, electromagnetic features of these bulk and surface modes in matter turn out to be closely related to the material properties of a medium, and, in particular, to the resonant states in the frequency dependence of its macroscopic dielectric function [2]. In such approach, the polaritons are completely determined by the characteristic frequencies of the relative permittivity of the medium. "
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    ABSTRACT: The dispersion law of both bulk and surface polaritons in a finely-stratified ferrite-semiconductor structure which is under an action of an external static magnetic field in the Voigt geometry is derived and examined in details. In the long-wavelength limit, when the thicknesses of the structure's layers as well as its period are optically thin, with an assistance of the method of effective anisotropic homogeneous medium, the expressions for relative effective constitutive parameters are retrieved in a general tensor form. The gyrotropic-nihility state is defined from the dispersion equation related to the bulk polaritons as a particular extreme condition, at which the longitudinal component of the corresponding constitutive tensor, as well as the corresponding bulk constant simultaneously acquire zero. The extraordinary spectral features of both bulk and surface polaritons near the frequency of the gyrotropic-nihility state are elucidated.
    Full-text · Article · Dec 2015
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