In the research of surface plasmons and metamaterials, the calculation of the optical response for metallic nanostructures is positioned as an important part. In this paper, both analytical and numerical calculation methods are reviewed. Although various calculation methods have been developed, it is important to choose a calculation method suitable for the target structure.
This paper describes nanocoating lithography technique with factors of high-throughput and high-resolution. Nanocoating lithography technique is a nanofabrication technique based on nanocoating of thin film on a template and its selective removal. This technique enables us to fabricate metal nanostructure arrays with shapes of nanofins or nanopillars with relatively little efforts. Metal nanostructures fabricated by nanocoating lithography have electrical conductivity and show plasmon resonance under specific wavelength range depending on their size and shape. In addition to the nanocoating lithography processes, electrical and optical applications of metal nanostructure fabricated nanocoating lithography technique will be discussed．
The stabilization of Ag nano-strucures such as nanoparticles and thin layers are described from fundamental viewpoint in the light of the accumulated knowledge on it in photographic science. The oxidation of Ag nano-structures are analyzed in terms of the control of their work function by binder (gelatin), self-assembled monolayer (SAM), and AgI membrane, since it is regarded as the first step for main causes of their degradations, which are the oxidation of Ag atoms on their surfaces followed by Ag＋ migration and Ag2S formation.
A review is given on recent progresses of metal-dielectric-multilayer (MDM) structures, which attract keen interests of researchers as transparent electrodes owing to their high electric conductivity and high transmittance in visible region as applicable to organic light-emitting devices (OLED) and organic solar cells. Then, the properties of MoO3/Ag/MoO3 and its application to OLED, which we are studying, are briefly described as example.
Fine-grained nuclear emulsion with the silver halide crystals of several 10 nm is the solid tracking detector which has the highest spatial resolution in the world. Recorded tracks consist of the silver grains with several 10 nm, namely this size corresponds to the size that can be observed the localized surface plasmon resonance (LSPR). In this study, we developed new method for particle tracking analysis using effect of the LSPR and super-resolution microscopy which can be obtained the information with 10 nm scale by combination with polarize characterization. Now, we are constructing new particle analysis method and the system using such new optical effect, and those technologies will be connected to quite new methodology for the nuclear emulsion technologies.
We have developed a dielectric loss measurement system that extends the measurement limit in the radio frequency range up to 2 GHz and evaluated ionic conductivity of silver iodide fine grains in detail for the first time. Physical properties of silver-iodide fine-grain emulsions have been regarded as important for the purpose of increasing sensitivity, because the silver-iodide fine-grains can be fixed in the thermal development system. The dielectric loss response of tetradecahedral silver iodide grains indicated two peak components as silver bromide octahedral grains. The activation energy of the ionic conductivity of silver iodide grains was 0.42 eV that was obtained from the peak on the low frequency side reflecting the ionic conductivity of the grains, and the surface potential of obtained from this value was －0.18 eV.