Presentations -

Low Tg Negative Graded Index Plastic Optical Fiber

UEKI SHUNTA NIHEI EISUKE

The 65nd Spring Meeting, 2018. The Japan Society of Applied Physics and the Related Societies (Tokyo (WASEDA University)) , 

2018.03

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Poster presentation, The Japan Society of Applied Physics

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A light branch device with the high branch efficiency was achieved using the negative refractive index distribution type plastic optic fiber with low Tg.

Improvement of Luminescence Property of ECL Device using a Plurality of Low Molecular Compounds

TAKAYAMA HIROYUKI NIHEI EISUKE

The 65nd Spring Meeting, 2018. The Japan Society of Applied Physics and the Related Societies (Tokyo (WASEDA University)) , 

2018.03

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Oral presentation (general), The Japan Society of Applied Physics

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Improvement of luminescence property was achieved by adding more than one low molecular compound to a electrochemluminescence device.

Output Beam Analysis of the Fluorophore-Doped Polymer Optical Fiber Under the Normal Stress

MIZOROGI DAICHI MAKINO KENJI NISHIMURA RYOICHI TSUKADA KENJI NIHEI EISUKE FURUKAWA REI

The 62nd Spring Meeting, 2015. The Japan Society of Applied Physics and the Related Societies (Hiratsuka City (Tokai University)) , 

2015.03

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Poster presentation, The Japan Society of Applied Physics

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An optical characteristic change in a fiber was found by adding a stress from outside to the polymer optical fiber to which a dye was added, and an achieved possibility of the stress sensor using this fiber was indicated.

Fabrication and Light Branching of Negative Type GI Plastic Optical Fiber

TSUKADA KENJII ASAKURA KOICHI NIHEI EISUKE

The 23rd International Conference on Plastic Optical Fibers (Yokohama city (Keio University)) , 

2014.10

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Poster presentation, POF Consortium

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It was done clearly that reproducibility can make the negative graded-index type polymer optic fiber from a UV assist frontal polymerization technique of ultraviolet rays, and it was reported that a light branch device using this can be achieved easily.

Electrogenerated Chemiluminescence with Comb-Shaped Electrode

NISHIMURA RYOICHI NIHEI EISUKE

The 75th JSAP　Autumn Meeting, 2014 (Sapporo city (Hokkaido University)) , 

2014.09

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Oral presentation (general), The Japan Society of Applied Physics

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It was confirmed that a change in the amount of the luminous solution doesn't have an influence on the luminous intensity by using comb-shaped electrode in a electrochemiluminescence device.

Realization of prolong electrogenerated chemiluminescence

YOSHIDA TAKAYUKI NIHEI EISUKE

The 75th JSAP　Autumn Meeting, 2014 (Sapporo city (Hokkaido University)) , 

2014.09

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Oral presentation (general), The Japan Society of Applied Physics

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We succeeded to achieve prolong emission of light by increasing the amount of the luminous solution in a electrochemiluminescence device.

Fabrication of Negative-type Graded Index Plastic Optical Fiber Using UV Assisted Frontal Polymerization Technique

TSUKADA KENJII ASAKURA KOICHI NIHEI EISUKE

The 74th JSAP　Autumn Meeting, 2013 (Kyoutanabe city (Doushisya University)) , 

2013.09

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Oral presentation (general), The Japan Society of Applied Physics

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By using the UV assist frontal polymerization technique, it possible to produce the negative-type graded index plastic optical fiber which was difficult for production with sufficient reproducibility.

Evanescent Wave Optical Amplifier in Water-Soluble Dye

TAKAMIZAWA KENGO NIHEI EISUKE

62nd SPSJ Symposium on Macromolecules (Kanazawa city （Kanazawa University）) , 

2013.09

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Poster presentation, The Society of Polymer Science, Japan

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It succeeded in producing an optical amplifier by refractive-index distribution type polymer optical waveguide and water-soluble pigment.

Control of Spatially Periodic Pattern Spontaneously Generated by Coating of Viscouse Fluid and Analysis of its Light Diffusion Property

NAKAZAWA RYO KURODA AKIHIRO NIHEI EISUKE ISHIGURE TAKAAKI SUZUKI YUICHIRO OKANO KUNIHIKO ASAKURA KOUICHI

The 93rd Annual Meeting of The Chemical Society of Japan (Kusatsu city　（Ritsumeikan University) , 

2013.03

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Oral presentation (general), The Chemical Society of Japan

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The control of the spatially periodic stribe patterns made by viscous fingering phenomena was tried. Moreover, the relationship between the diffusion of laser beam that went through the fabricated pattern surface and the shape of the stripe pattern was investigated. The larger light diffusion property was observed when the characteristic length was relatively small and the gap was relatively large.

Fabrication of Negative-type Graded Index Plastic Optical Fiber Using UV Assisted Frontal Polymerization Technique

TSUKADA KENJI NIHEI EISUKE

The 9th SPSJ International Polymer Conference (IPC2012) (Kobe city) , 

2012.12

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Oral presentation (general), The Society of Polymer Science, Japan

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We proposed an UV assisted frontal polymerization technique for obtaining the negative refractive-index distribution type polymer optical fiber preform rod. Compared with the multi-step interfacial-gel polymerization technique reported so far, we were able to be easily obtained with an almost ideal refractive index distribution under the proper fabrication conditions.

Fabrication of Polymer ECL Device with Emitting Assistant by Low Molecular Materials

DAIMON TATSUYA NIHEI EISUKE

61st SPSJ Symposium on Macromolecules (Nagoya City (Nagoya Institute of Technology)) , 

2012.09

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Oral presentation (general), The Society of Polymer Science, Japan

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It was shown clearly that emission lifetime and intensity were improvable by adding a low molecular compound (perylene) to the ECL device using π-conjugated polymer for luminescent material. Furthermore, this characteristics improvement mechanism were explained theoretically.

Fabrication of High Bandwidth Negative-Refractive Index Distribution Type Polymer Optical Fiber

NAKAGAWA YUMI NIHEI EISUKE

The 59th Spring Meeting, 2012. The Japan Society of Applied Physics and the Related Societies (Tokyo (Waseda University)) , 

2012.03

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Oral presentation (general), The Japan Society of Applied Physics

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We proposed the negative refractive-index distribution type polymer optical fiber (N-GI-POF). And as a result of calculating the bandwidth of this fiber using a numerical simulation, the bandwidth was almost the same as the normal refractive-index distribution type polymer optical fiber.　Moreover, when N-GI-POF was actually produced and the transmission band was measured, it became clear that they are about 700 MHz/100m.

One-pot Synthesis of Polybenzyl Main Chain Luminescent Material Including Anthracene Structure

TSUKADA KENJI NIHEI EISUKE

2012年春季第59回応用物理学関係連合講演会 (Tokyo (Waseda University)) , 

2012.03

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Oral presentation (general), The Japan Society of Applied Physics

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We synthesized the blue light-emitting materials of high quantum yield using various benzyl group derivatives as monomer that was known as inexpensive reagent. Moreover, blue luminescence was confirmed from the organic electrogenerated chemiluminescence element produced using the obtained material. The realization of inexpensive lighting and a display element are expected by ECL element of easy structure using the obtained material.

Fabrication of Gradient Index Lens by the Frontal Polymerization Technique with UV Ray Irradiation

KAZUKI IKEDA KOICHI ASAKURA EISUKE NIHEI

1st International converence on Advanced Photonic Polymers (ICAPP) (Yokohama city (Conference Center, Pacifico Yokohama)) , 

2011.12

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Poster presentation, ICAPP 2011 Organaizing Committee

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We proposed the frontal polymerizing technique which used heat and ultraviolet rays. It succeeded in producing the refractive-index distribution type polymer waveguide which has the controlled refractive-index distribution by using the frontal polymerization technique which irradiates with ultraviolet rays.
Moreover, two waveguide were able to be simultaneously produced by irradiating with two thin ultraviolet rays.

Fabrication of High Bandwidth Negative-Refractive Index Type GI Polymer Optical Fiber

YUMI NAKAGAWA EISUKE NIHEI

1st International Conference on Advanced Photonic Polymers (ICAPP) (Yokohama city (Conference Center, Pacifico Yokohama)) , 

2011.12

, 

Poster presentation, ICAPP 2011 Organaizing Committee

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We proposed the negative refractive-index distribution type polymer optical fiber. And as a result of calculating the bandwidth of this fiber using a numerical simulation, the bandwidth was affected by the material dispersion of polymer like an normal refractive-index distribution type optical fiber.
Furthermore, it actually succeeded in producing negative refractive-index distribution type optical fiber preform rod using the interfacial-gel polymerizing technique of many stages.

Bandwidth Calculation of Fresnel Lens Type Refractive Index Distribution Plastic Optical Fiber

YOSUKE TAKEUCHI EISUKE NIHEI

1st International converence on Advanced Photonic Polymers (ICAPP) (Yokohama city (Conference Center, Pacifico Yokohama)) , 

2011.12

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Poster presentation, ICAPP 2011 Organaizing Committee

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We proposed various Fresnel lens type refractive index distribution plastic optical fibers and we permitted the calculation of discontinuous refractive index distribution fiber's bandwidth by using ray tracing method which obtains optical path length. Moreover, we successfully obtained the Fresnel lens type refractive index distribution preform rod by interface-gel polymerization technique.

Synthesis of Polybenzyl Main chain Luminescence Materials Including Anthracene Structure

KENJI TSUKADA EISUKE NIHEI

1st International converence on Advanced Photonic Polymers (ICAPP) (Yokohama city (Conference Center, Pacifico Yokohama)) , 

2011.12

, 

Poster presentation, ICAPP 2011 Organaizing Committee

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We synthesized the blue light-emitting materials of high quantum yield using various benzyl group derivatives as monomer that was known as inexpensive reagent. In this synthesis, anthracene structures were formed with dehydrogenating of 9,10-dihydroanthracene in same process. Those anthracene structures gave the photoluminescence property.
In this synthesis, an addition of appropriate amount of cross-linking reagent gave higher molecular weight products.

The Fabrication of Optical Amplifier for Plastic Optical Fiber

TAKAYUKI HIRAI EISUKE NIHEI

1st International converence on Advanced Photonic Polymers (ICAPP) (Yokohama city (Conference Center, Pacifico Yokohama)) , 

2011.12

, 

Poster presentation, ICAPP 2011 Organaizing Committee

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We proposed the optical amplifier for polymer optical fiber by using an evanescent wave phenomena.　The amplification phenomena by using evanescent wave and laser dye solution was confirmed. This result exhibit the possibility to realize the continious wave signal amplification. Furthermore, the defocus type waveguide could be fabricated by interfacial-gel polymerization technique. If the obtained defocus type waveguide was assumed, it was confirmed that the reflect frequency was increased by ray trace simulation.

Fabrication of Organic ECL Device with Polymer Materials

TATSUYA DAIMON EISUKE NIHEI

1st International converence on Advanced Photonic Polymers (ICAPP) (Yokohama city (Conference Center, Pacifico Yokohama)) , 

2011.12

, 

Poster presentation, ICAPP 2011 Organaizing Committee

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The organic electrogenerated chemiluminescence（ECL）devices are having simple structure where the organic dye solution was inserted with the electrode of two sheets. Therefore, these devices can be expected as a new flat panel display.
In this study, we proposed an organic ECL devices using the conductive polymer, poly(2,5-dioctylphenylene-1,4-ethynylene)(PPE) and poly(3-octylthiophene)(P3OT), for luminescence materials. The light-emitting time of P3OT was about 6000s and PPE was about 180s.

Fabrication of High Bandwidth Negative-Refractive-Index type GI Optical Fiber

NAKAGAWA YUMI NIHEI EISUKE

60th SPSJ Symposium on Macromolecules (Okayama city (Okayama University)) , 

2011.09

, 

Poster presentation, The Society of Polymer Science, Japan

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We proposed the negative refractive-index distribution type optical fiber. And as a result of calculating the bandwidth of this fiber using a numerical simulation, having the same value as an normal refractive-index distribution type optical fiber was predicted.
Furthermore, it actually succeeded in producing negative refractive-index distribution type optical fiber preform rod using the interfacial-gel polymerizing technique of many stages.