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Volume 56, Issue 11
Displaying 1-15 of 15 articles from this issue
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2007 Volume 56 Issue 11 Pages 880-882
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
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Kenji GAMO2007 Volume 56 Issue 11 Pages 883
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
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Keiji NAGAI2007 Volume 56 Issue 11 Pages 884-888
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSTarget fabrication technique is a key issue of laser fusion. In this review, polymer materials for laser fusion target fabrication are overviewed. To achieve highly efficient laser implosion, organic and highly spherical millimeter-sized capsules and cryogenic deuterium layers inside should be uniform in its diameter and thickness within nanometer errors. Porous structured polymers are required for the support of cryogenic DT, especially for fast-ignition targetsView full abstractDownload PDF (3730K) -
Yoshikazu HOMMA, Daisuke TAKAGI2007 Volume 56 Issue 11 Pages 889-892
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSIt has long been believed that effective catalyst of single-walled carbon nanotube (SWCNT) synthesis should have catalysis of graphite formation. Metals typically used for the catalyst are iron, cobalt, nickel, and palladium, which are known to produce graphite on bulk crystal surface. Recently, however, gold, silver, and copper have been reported to produce SWCNTs when these metals become nanosized particles. Moreover, even silicon, germanium, and silicon carbide have been found to produce SWCNTs. These new findings lead to a question, what is the role of catalyst in SWCNT growth? We think the essential role of the catalyst is providing a template for formation of a cap composed of five- and six-membered rings. Carbon atoms precipitated or adsorbed on the nanoparticle surface may assemble themselves to form CNT caps. Once a cap is created, it acts as a nucleus and carbon atoms on the nanoparticle are incorporated into the edge of the cap, forming a graphite sheet cylinder as a nanotube. On a flat surface, even if a graphite sheet is formed, its surface is inert and graphite growth is terminated at one monolayer. Nanoscale curvature is necessary for nucleation of hemispherical carbon network.View full abstractDownload PDF (3353K) -
Kazutaka NAKAMURA2007 Volume 56 Issue 11 Pages 893-896
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSI review a generation technique of ultrahigh pressures by pulse laser irradiation and recent research works on molecular dynamics in condensed matter under ultrahigh pressures. Dynamics of molecules is investigated by using nanosecond time-resolved laser spectroscopy. Molecular deformation of polymer (polytetrafluoroethylene) from helical conformation to planar zigzag conformation has been observed within 10 ns at pressure of 1 GPa. Liquid-solid phase transition of benzene at 4 GPa has been observed within 20 ns by time-resolved coherent anti-Stokes Raman spectroscopy.View full abstractDownload PDF (1883K) -
Takuo TANAKA2007 Volume 56 Issue 11 Pages 897-901
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSA plasmonic metamaterial is an object which has artificially designed micro/nano-sized metallic structures. It can exhibit extraordinary optical properties such as a negative refractive index or a magnetic response that has never been observed for natural materials in the optical frequency regime. In this paper, the mechanism of the metamaterials and their application to unprecedented optical devices such as perfect lenses, optical cloaking devices, and non-reflectioonp ticalf unctionaclo mponentsis described. Ina dditiona, s a fabricatiotne chnique of 3D m etals tructures, a two-photon induced metal reduction technique is also proposed.View full abstractDownload PDF (2450K) -
Shinji OKAZAKI2007 Volume 56 Issue 11 Pages 902-905
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSMiniaturization of ULSI devices have been promoted by the development of lithography. Optical lithography has been widely used for the fabrication of ULSI devices. However the limitation of resolution in optical lithography is on the horizon. To overcome this situation, EUV lithography is a promising candidate for the lithography below hp 32 nm technology. EUV lithography system is composed of the following 5 sub-systems, light source, optical system, exposure system, mask and resist material. There are two major candidates for the light source. One is a laser produced plasma source and the other one is a gas discharge plasma source. As higher resist sensitivity allows smaller source output power, the development of resist materials with higher resist sensitivity is strongly required for minimizing the output power of the light source. There are also other requirements for the resist materials. Higher sensitivity, higher resolution and smaller LER (Line Edge Roughness) are required for resist materials in simultaneously. However, there are tradeoff relationships between these 3 parameters. To overcome the problem, new resist chemistry is strongly required.View full abstractDownload PDF (1997K) -
Tetsuo TANIUCHI2007 Volume 56 Issue 11 Pages 906-909
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSCoherent tunable terahertz (THz) waves have great potential for medical and chemical imaging applications. Organic DAST crystals with large nonlinear optical effect are promising material for THz wave source by difference frequency generation. Widely tunable THz waves ranging from 2 to 20 THz were successfully generated from DAST crystals using a dual-wavelength optical parametric oscillator. A compact spectroscopy system was developed using the tunable THz source and a pyroelectric detector operating at room temperature. THz technology based on organic materials should be useful for practical THz imaging, THz sensing and spectroscopic applications.View full abstractDownload PDF (3082K) -
Hideyoshi HORIMAI, Junichi IKEDA2007 Volume 56 Issue 11 Pages 910-913
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
JOURNAL FREE ACCESSAccording to the progress of information technology, memories are succeeding generations grown in capacity, but“bit-by-bit”recording systems are reach to the limit. Because of its high recording capacity and high transfer rate, collinear holographic memory takes a hopeful view on the next generation memory. The recording mechanism, components and requirements of the recording material for collinear holographic memory were reviewed.View full abstractDownload PDF (3904K) -
2007 Volume 56 Issue 11 Pages 914
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
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2007 Volume 56 Issue 11 Pages 914a
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
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2007 Volume 56 Issue 11 Pages 914b
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
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2007 Volume 56 Issue 11 Pages 914c
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
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Toshiaki SUZUKI, Zhaomin HOU2007 Volume 56 Issue 11 Pages 915-920
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
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[in Japanese]2007 Volume 56 Issue 11 Pages 921
Published: November 01, 2007
Released on J-STAGE: October 14, 2011
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