| POLYMERS Vol.61 No.7 |
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COVER STORY
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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