Plasmonics for extreme light concentration and manipulation. Nat Mater 9:193-204

Nature Materials (Impact Factor: 36.5). 02/2010; 9(3):193-204. DOI: 10.1038/nmat2630


The unprecedented ability of nanometallic (that is, plasmonic) structures to concentrate light into deep-subwavelength volumes has propelled their use in a vast array of nanophotonics technologies and research endeavours. Plasmonic light concentrators can elegantly interface diffraction-limited dielectric optical components with nanophotonic structures. Passive and active plasmonic devices provide new pathways to generate, guide, modulate and detect light with structures that are similar in size to state-of-the-art electronic devices. With the ability to produce highly confined optical fields, the conventional rules for light–matter interactions need to be re-examined, and researchers are venturing into new regimes of optical physics. In this review we will discuss the basic concepts behind plasmonics-enabled light concentration and manipulation, make an attempt to capture the wide range of activities and excitement in this area, and speculate on possible future directions.

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Available from: Mark L Brongersma, Apr 24, 2014
    • "Besides dielectric structures, the employment of metallic nanostructures gained increasing interest for the enhancement of fluorescence assays owing to their unique plasmonic properties [8]. The coupling of fluorophore labels with plasmonic metallic nanostructures offers efficient means for the fluorescence signal amplification [9] [10] which can reach a factor as high as 10 3 [11] for individual molecules placed at so-called " plasmonic hotspots " . "
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    ABSTRACT: Plasmonic amplification of fluorescence signal in bioassays with microarray detection format is reported. A crossed relief diffraction grating was designed to couple an excitation laser beam to surface plasmons at the wavelength overlapping with the absorption and emission bands of fluorophore Dy647 that was used as a label. The surface of periodically corrugated sensor chip was coated with surface plasmon-supporting gold layer and a thin SU8 polymer film carrying epoxy groups. These groups were employed for the covalent immobilization of capture antibodies at arrays of spots. The plasmonic amplification of fluorescence signal on the developed microarray chip was tested by using interleukin 8 sandwich immunoassay. The readout was performed ex situ after drying the chip by using a commercial scanner with high numerical aperture collecting lens. Obtained results reveal the enhancement of fluorescence signal by a factor of 5 when compared to a regular glass chip.
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    • "The term " surface plasmon " refers to the collective electrons oscillation on the metal surface , and " polariton " , which combine exciton and photon properties as a quasi-particle, indicates that the SPP involves coupling of electromagnetic waves and the dielectric excitations. Due to the unique properties of the SPP, such as capacity of confining the electromagnetic field [1] [2], it has become one of the interesting field of applied research [3]. "
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    ABSTRACT: In this paper we will present a quantization method for SPP (Surface Plasmon Polariton) based on Green's tensor method, which is applied usually for quantization of EM-field in various dielectric media. This method will be applied for a semi-infinite structure, which contains metal and dielectric regions with one interface. Moreover, by introducing the quantized SPP, we will investigate the SPP propagation in the attenuating and amplifying systems. We will also consider two modes of SPP, i.e., coherent and squeezed states, and finally compare the propagation of these modes in the amplifying media.
    Preview · Article · May 2015 · Plasmonics
    • "Further, the photonic crystals are used as back reflectors and the surface anti reflectors [12]. The plasmonic periodic structures are used in solar cells to concentrate the EM radiation into the solar cell [13]. "
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    ABSTRACT: Random textures are proved to be better for energy harvesting in solar cells. In this research, we have studied the absorption properties of a random dielectric medium with plasmonic nanostructures in it. This structure has shown significant enhancement in broad band absorption of light spectrum and higher extinction of near infrared wavelengths. We also discuss several strategies to improve the solar cell efficiency based on dielectric and plasmonic random media. Finally, a comparative study of solar cell efficiencies with flat, periodic and random structures as active medium and back reflectors is carried out with a proposal for possible potential solar cell configurations. © (2015) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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