POLYMERS Vol.61 No.7
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Polymers for Building the Future Network Society
COVER STORY: Highlight Reviews
Photonics Polymer and Face-to-Face Communication Yasuhiro KOIKE
<Abstract> The Internet has built a new information society where a lot of people are connected with one another all over the world. However, it seems that we are still living in a society where we have to adapt ourselves to the extended electronic technology being stuck on small screens. The key to realize the lively face-to-face communication is “the photonics innovation” that was achieved by profound material studies focusing on intrinsic properties.
Keywords: Photonics Polymer / Face-to-Face Communication / Graded-Index Plastic Optical Fiber (GI POF) / Highly Scattered Optical Transmission (HSOT) Polymer / Zero Birefringence Film / LCD / Reconstruction of Japan
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Metamaterials and Nanofabrication Nobuyuki TAKEYASU
<Abstract> Metamaterial attracts attentions as a material which responds to the magnetic component of light, which is never found in nature. The working frequency has been dramatically increased, and highly advanced fabrication methods are required for three-dimensional metamaterials in the near-infrared/visible region. Here, I introduce the progress of metamaterials and fabrication methods.
Keywords: Metamaterials / Multi-Photon Fabrication / Polymer Template / Electrochemical Metal Deposition / Assembled Nanoparticles
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Optical Information Processes and Displays Based on the Interaction Between Light and Organic / Polymer Materials Fuyuki ITO
<Abstract> Optical information processes and displays based on the interaction between light and organic/polymer materials are reviewed. The composite polymer guided wave mode devices are useful for ultrafast all-optical light modulation in a near-infrared region. The modulation is due to photoinduced absorption or bleaching in the polymer layer containing photoresponsive organic dyes. Photoinduced complex refractive index change occurs due to transient absorption (Δk) of the porphyrin tape (CuT4) and its Kramers-Kronig transformation (Δn). The response was less than 1.3 ps at optical telecommunication wavelength. As display devices based on emission from organic molecules, the all-organic, transparent, flexible, versatile color displays were fabricated by viscous polymeric matrix. The emission originated from upconversion process via triplet-triplet annihilation. The device was working at ultra-low excitation intensity.
Keywords: Molecular Photonics / Organic Dyes / Ultrafast All-Optical Modulation / Guided Wave Mode (GWM) Device / Transient Absorption / Up-Conversion Fluorescence / Triplet-Triplet Annihilation
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COVER STORY: Topics and Products
Retardation Films Based on Molecular Design and Nano Structural Control Technologies Akihiko UCHIYAMA
<Abstract> This article presents our two novel polymer technologies on retardation films (RF). One is the wide-band RF that consists of molecular designed polymer based on our birefringence dispersion control theory. The other is the super nano multi-layered RF using the combination of the structural and molecular orientation birefringence for wide-viewing LCDs.
Keywords: Retardation / Optical Film / Birefringence / Wide-Band / Dispersion / Refractive Index / Nano Structure / Multi-Layer
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Transparent Conductive Sheet Application of Large-Area and Low-Temperature Synthesized Graphene Masataka HASEGAWA, Jaeho KIM, Masatou ISHIHARA, Takatoshi YAMADA
<Abstract> We utilized the original large-area microwave plasma CVD method sustained by surface waves for the large-area and low-temperature synthesis of graphene. Graphene has been successfully obtained by this technique, and a capacitive touch panel was produced demonstrating the successful use of graphene. The roll-to-roll synthesis of graphene has been established by using this low-temperature CVD technique.
Keywords: Graphene / Microwave Plasma CVD / Low Temperature / Large Area / Transparent Conductive Sheet / Touch Panel / Roll-to-Roll Synthesis
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High Speed Plastic Optical Fiber Hirotsugu YOSHIDA
<Abstract> We have developed a graded index plastic optical fiber (GI POF) based on a partially chlorinated polymer (PCP). This polymer is a highly transparent and high Tg material for GI POF due to hydrogen substitution in a polymer chain with chlorine. The PCP GI POF can be an adequate medium for a high speed data transmission in various fields.
Keywords: Graded Index Plastic Optical Fiber / Partially Chlorinated Polymer / High Speed Optical Link
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Development of Three-Dimensional Vector Wave Recording Takashi FUKUDA, Daisuke BARADA, Toyohiko YATAGAI
<Abstract> Here we introduce dual-channel polarization holography as an optical recording technique for three-dimensional vector wave memory. In dual-channel polarization holography, two orthogonally polarized signal beams with two individual images are superposed, and coupled with a reference beam on a recording medium. Then, the interference pattern consists of intensity and polarization pattern. Therefore, a polarization-sensitive medium must be used as a recording medium. In order to verify the operating principle of dual-channel polarization holography, two page data consist of p- and s-polarized beams were simultaneously recorded on the medium. The reference beam was set to s-polarized beam. When s-polarized readout beam is illuminated onto the recorded medium, the recorded two images are simultaneously reconstructed, and the two images can individually be extracted by a polarizing beam splitter. From the experimental results, the operating principle was verified.
Keywords: Three-Dimensional Vector Wave Recording / Dual-Channel Polarization Holography / Page-Data Recording / Angular Multiplexing / Huge Capacity / Ultra High-Speed Data Rate / Polarization-Sensitive Medium / Optical Data Storage
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Polymer Science and I: A Personal Account
Enjoy the Present Moment Tamami TAKIGAWA
<Abstract> This is an account of my research experiences in various environments. I'm enjoying the present moment, and new challenge.
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Front-Line Polymer Science
Precision Polymer Synthesis via Olefin Metathesis Polymerization Shingo KOBAYASHI
<Abstract> The recent development of olefin metathesis catalysts has expanded the scope of olefin metathesis polymerization and the polymerization method has already been a popular topic in the area of the polymer synthesis. Since the recent olefin metathesis catalysts (e.g., Grubbs' catalyst) show high functional group tolerance and high catalyst activity, olefin metathesis polymerization has emerged as a powerful tool for synthesizing polymers possessing functional groups as well as controlled molecular architectures. Particularly, olefin metathesis polymerization allows synthesizing a polymer exhibiting a quite unique molecular structure and having precisely placed side-chain branches. This article provides a brief summary of the investigators' reports on olefin metathesis chemistry. In addition to tracing the historical development of metathesis polymerization, this article covers the fundamental aspects of the method including both acyclic diene metathesis polymerization (ADMET) and ring-opening metathesis polymerization (ROMP). Special attention is paid to the synthesis of polymers having precisely placed side-chain branches via the metathesis polymerization, ADMET and ROMP.
Keywords: Olefin Metathesis / Metathesis Polymerization / ADMET / ROMP / Precisely Placed Side-Chain Branch / Regularly Branched Polymer / Precision Polyolefin / Regio- and Stereoselective ROMP
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