Fundamentals of Plasmonics.- Electromagnetics of Metals.- Surface Plasmon Polaritons at Metal / Insulator Interfaces.- Excitation of Surface Plasmon Polaritons at Planar Interfaces.- Imaging Surface Plasmon Polariton Propagation.- Localized Surface Plasmons.- Electromagnetic Surface Modes at Low Frequencies.- Applications.- Plasmon Waveguides.- Transmission of Radiation Through Apertures and Films.- Enhancement of Emissive Processes and Nonlinearities.- Spectroscopy and Sensing.- Metamaterials and Imaging with Surface Plasmon Polaritons.- Concluding Remarks.

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Plasmonics: Fundamentals and Applications

From molecules to crystal engineering: supramolecular isomerism and polymorphism in network solids.

This critical review will be of interest to the experts in porous solids (including catalysis), but also solid state chemists and physicists. It presents the state-of-the-art on hybrid porous solids, their advantages, their new routes of synthesis, the structural concepts useful for their ‘design’, aiming at reaching very large pores. Their dynamic properties and the possibility of predicting their structure are described. The large tunability of the pore size leads to unprecedented properties and applications. They concern adsorption of species, storage and delivery and the physical properties of the dense phases. (323 references)

Hybrid porous solids: past, present, future

Since the first application of the surface plasmon resonance (SPR) phenomenon for sensing almost two decades ago, this method has made great strides both in terms of instrumentation development and applications. SPR sensor technology has been commercialized and SPR biosensors have become a central tool for characterizing and quantifying biomolecular interactions. This paper attempts to review the major developments in SPR technology. Main application areas are outlined and examples of applications of SPR sensor technology are presented. Future prospects of SPR sensor technology are discussed.

Surface plasmon resonance sensors: review

Optical tweezers use the forces exerted by a strongly focused beam of light to trap and move objects ranging in size from tens of nanometres to tens of micrometres. Since their introduction in 1986, the optical tweezer has become an important tool for research in the fields of biology, physical chemistry and soft condensed matter physics. Recent advances promise to take optical tweezers out of the laboratory and into the mainstream of manufacturing and diagnostics; they may even become consumer products. The next generation of single-beam optical traps offers revolutionary new opportunities for fundamental and applied research.

http://physics.nyu.edu/grierlab/nreview2c/nreview2c.pdf

A revolution in optical manipulation

We developed a bit-oriented three-dimensional recording with a Ce-doped Sr0.75Ba0.25Nb2O6 (SBN:75) crystal. The ferroelectric polarization was reversed by a focused laser beam in a crystal with a temperature of 38 °C to form bit data. The recorded domain was stable at 15 °C. The data were read as the refractive-index change induced by spontaneous polarization through the Pockels effect. We wrote a single datum in SBN:75 crystal with ferroelectric-domain reversal and observed the domain image with a phase-contrast microscope. Numerical calculations to estimate the domain image were also performed. The observed results were in good agreement with the numerical expectations.

Optical recording of reversed domains in a Ce-doped SBN:75 crystal for bit-oriented three-dimensional optical memory

The authors experimentally demonstrated magnetically excited magnetic resonances with negative magnetic permeability in a metamaterial composed of an array of silver rod pairs. In transmission spectroscopy of the metamaterial, by employing oblique incidence, an incident-magnetic-field-dependent absorption feature was clearly observed at 18THz. The experimental results directly prove that the rod pair structure interacted with the magnetic field of the incident light, producing magnetic resonance. The experimental results were in good agreement with a numerical simulation suggesting that the value of μRe of the silver rod pair array changes from −0.29 to 2.26 at resonance.

/pdf/magnetic-excitation-of-magnetic-resonance-in-metamaterials-2wvphhe95a.pdf

Magnetic excitation of magnetic resonance in metamaterials at far-infrared frequencies

Micronanostructures prepared by two-photon photopolymerization are utilized as templates for electroless plating of metals, giving rise to an approach for fabricating complex-shaped metal micronanostructures that are so far not achievable by other means. We show that when the coated-layer thickness of a metal coating is larger than a critical value (around 20 nm for silver at 2–3 μm wavelength) associated with the metal's skin depth, the photonic crystals exhibit optical properties more comparable to a solid metal structure than to their polymer counterparts.

Metal-nanoshelled three-dimensional photonic lattices

We have previously demonstrated that two-photon induced polymerization allows fabrication of complex threedimensional structures such as photonic crystals and micromachines with a spatial resolution around 120 nm. In this report, we show the resolution improvement till 65 nm. Experimentally, 780-nm femtosecond laser pulses were focused into a photopolymerizable resin by a high numerical aperture objective lens. The resin is polymerized by means of radical initiation. In the radical polymerization, oxygen molecules dissolved in the resin inhibit the polymerization reactions by scavenging the radicals that initiate the polymerization. At controlled laser pulse energy, the radicals can survive and initiate polymerization only at the region where exposure energy is larger than the polymerization threshold, leading to a sub-diffraction-limited spatial resolution. In order to further improve the fabrication accuracy, we introduced a radical quencher into the resin, and at an optimized concentration the lateral spatial resolution was improved to 100 nm. Moreover, we fabricated a suspended fiber connected between two anchors by controlling the exposure dose within the fiber. After removing the unsolidified resin by ethanol and drying, a 65-nm width fiber was obtained, suggesting a possible spatial resolution of similar dimension. The size less than 1/10 of the excitation wavelength could satisfy requirements of many photonic and optoelectronic devices.

Satoshi Kawata

Papers

Optical recording of reversed domains in a Ce-doped SBN:75 crystal for bit-oriented three-dimensional optical memory

Magnetic excitation of magnetic resonance in metamaterials at far-infrared frequencies

Metal-nanoshelled three-dimensional photonic lattices

The study on spatial resolution in two-photon induced polymerization

Quantifying theory of optical orientation processes in spectrally distinguishable photoisomers: application to a spiropyran-type chromophore