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Volume 36, Issue 3
Displaying 1-8 of 8 articles from this issue
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Yoshimasa KAWATA2008 Volume 36 Issue 3 Pages 110
Published: March 15, 2008
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSDownload PDF (171K) -
Satoshi KAWATA2008 Volume 36 Issue 3 Pages 111-116
Published: March 15, 2008
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSPlasmonics is a science based on surface plasmon polaritons on metallic nano-structures. While this science has been established around eighty years before, it has gained again recently enthusiasm in photonics community.In this review I will lecture on the trends in plasmonics for device applications. The story starts with the generation of slow light, which is used for nano-imaging in tip-enhanced near-field microscopy. The discussion will be extended to shape/size of nanostructure and the imaging “beyond the plasmonics” . Another function of plasmonic device in addition to slow light or nano-resolution is a localized strong field. Development of plasmonic bandgap laser is shown as one of promising applications of plasmonics. Spectroscopy and history of plasmonics are also reviewed.View full abstractDownload PDF (8689K) -
Junichi TAKAHARA2008 Volume 36 Issue 3 Pages 117-122
Published: March 15, 2008
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSPlasmonic waveguides are metal optical waveguides that confine and guide low-dimensional optical waves in nano-space beyond the diffraction limit. Recently, many types of subwavelength plasmonic waveguides have been proposed. We classify structures of the waveguides and review superfocusing observed in tapered plasmonic structures. We can apply tapered plasmonic waveguide to nano-optical couplers in order to focus optical energy into nano-space. We study electromagnetic field in wedged metal gap waveguide by numerical simulations. We report selective excitation of superfocusing mode by ATR method in metal gap waveguides that support propagation of coupled mode of surface plasmon polariton.View full abstractDownload PDF (1781K) -
Motoichi OHTSU, Tadashi KAWAZOE, Takashi YATSUI, Wataru NOMURA2008 Volume 36 Issue 3 Pages 123-127
Published: March 15, 2008
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSIn order to break the limit of plasmonics, this paper reviews the principles and practices of nanophotonics. Nanophotonics is the technology utilizing the optical near fields to realize novel device, fabrications and systems. The optical near field is the elementary surface excitations on nanometric particles, or, in the other words, the dressed-photon which is the photon carrying the material energy. Nanophotonic devices including logic gates and an optical nano-fountain are demonstrated as the evidence of realizing the qualitative innovation which has been realized due to optical near field interaction between nanomatric particles.View full abstractDownload PDF (12340K) -
Takuo TANAKA2008 Volume 36 Issue 3 Pages 128-133
Published: March 15, 2008
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSPlasmonic metamaterials, which are artificially designed materials involving nano-sized metallic three-dimensional structures, are introduced. The mechanism of controlling magnetic permeability in the optical frequency region and the design strategy of the metamaterials are theoretically investigated. In addition, unprecedented electromagnetic properties of metamaterials and their applications to optical cloaking devices and non-reflection optical functional components are also reviewed.View full abstractDownload PDF (1535K) -
Kotaro KAJIKAWA2008 Volume 36 Issue 3 Pages 134-138
Published: March 15, 2008
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSThe biosensing platforms based on Localized Surface Plasmons (LSPs) in metallic nanoparticles are reviewed. LSP biosensors probe selective binding of analyte to the surface-immobilized ligand that shows affinity to the analyte. Binding of analyte to the nanoparticle surface causes a change in the resonance condition of LSPs, resulting in a shift in absorption or scattering spectra. The LSP sensing has an advantage that the sensing can be performed without labeling using fluorescent chromophore. While the planner Surface Plasmon Resonance (SPR) biosensor is also a label-free sensing technique, the LSP sensing has advantages as follows:(1) the optical setup is flexible,(2) miniaturized sensors such as single nanoparticle sensors are possible, and (3) the sensitivity is similar to that of the SPR sensor.View full abstractDownload PDF (1142K) -
Teruo TAKESHITA, Shin-ichiro OKIHARA, Yoshihiro TAKIGUCHI2008 Volume 36 Issue 3 Pages 139-143
Published: March 15, 2008
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSWe have been studying non-invasive and non-destructive methods for inspecting internal structures that use laser-induced ultrasonic waves and an optical measurement technique. As one solution, we propose a new method for determining the internal structure from images of propagating ultrasonic waves induced by a single laser pulse, using a visualization technique that uses a laser beam for illumination and an image-converter tube. In this paper, the captured images of propagating ultrasonic waves in the space-time domain with nanosecond time resolution and two-dimensional dynamic images with fifty nanosecond exposure time are presented and analyzed. This investigation demonstrates the suitability of this proposed method for industrial applications.View full abstractDownload PDF (9701K) -
Takayuki KATOU, Nobuyuki ABE, Masanobu YAMANAKA, Koutaro MATSUMOTO2008 Volume 36 Issue 3 Pages 144-148
Published: March 15, 2008
Released on J-STAGE: March 26, 2014
JOURNAL FREE ACCESSWe have developed a femto-second laser machining system for lowering friction on mechanical parts which have nano-size periodic morphologies. The system consists of a femto-second laser, an optical beam shaper, and a five axes mechanical stage to control direction and orientation of the periodic structures on various kinds of mechanical parts. With this system, periodic structures were formed over curved surfaces of metal parts such as ball bearings and inner surfaces of engine cylinder. We have investigated laser power dependence on nano-size periodic morphologies as well as a function of laser scanning speed on the metal surfaces. At a fluence region around 0.5 J/cm2, a wide area of such fine periodic structures was obtained. By evaluating a friction of such surface, we have found about 25 % reduction in friction coefficient. We have proposed a simple monitoring system to measure the periodicity by reflection spectrum diffracted at the periodic surfaces.View full abstractDownload PDF (11431K)
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