Keishi Ohashi

上級研究員(研究院教授)

  • 1648 Citations
  • 20 h-Index
1979 …2017
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Research Output 1979 2017

  • 1648 Citations
  • 20 h-Index
  • 53 Article
  • 29 Conference contribution
  • 1 Chapter
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Conference contribution
2016
2 Citations (Scopus)

Industrialization trial of a biosensor technology

Ohashi, K. & Osaka, T., 2016 Jan 1, Contemporary Issues and Case Studies in Electrochemical Innovation 2. 39 ed. Electrochemical Society Inc., Vol. 75. p. 1-9 9 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ion sensitive field effect transistors
Biosensors
Finance
Chemical sensors
Medicine
2014
4 Citations (Scopus)

Tag-antenna-based presence sensing using near-field traveling-wave reader antenna

Hattori, W., Ohashi, K. & Fukuda, H., 2014 Feb 3, 2014 International Conference on the Internet of Things, IOT 2014. Institute of Electrical and Electronics Engineers Inc., p. 103-107 5 p. 7030123

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Traveling wave antennas
Antennas
Radio frequency identification (RFID)
Sensor nodes
Proximity sensors
2012

Infrared optical and mechanical properties of ceramic coatings fabricated by aerosol deposition

Tsuda, H., Akedo, J., Hirose, S. & Ohashi, K., 2012, Proceedings - IMAPS/ACerS 8th International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies, CICMT 2012. p. 406-410 5 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Ceramic coatings
Yttrium oxide
Aerosols
Barium
Optical properties
2011
1 Citation (Scopus)

A plastic bolometer array using carbon nanotubes for low-cost infrared imaging devices

Narita, K., Sekino, S., Kuribayashi, R., Altintas, E., Someya, H., Ohashi, K., Kamijo, K., Tsuda, K., Tabuchi, T., Imazato, M. & Komatsubara, S., 2011, IRMMW-THz 2011 - 36th International Conference on Infrared, Millimeter, and Terahertz Waves. 6105083

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Bolometers
Infrared imaging
Carbon nanotubes
Plastics
Infrared radiation

Silicon photonics devices for optical interconnection

Nakamura, T., Fujikata, J., Ishizaka, M. & Ohashi, K., 2011, Optics InfoBase Conference Papers.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photonic devices
Optical interconnects
Semiconductor optical amplifiers
Light modulators
Photodetectors
2008

Mn-doping effect on optical absorption of Pb(Zr,Ti)O3 films prepared by aerosol deposition

Tsuda, H., Nakada, M., Akedo, J. & Ohashi, K., 2008, 4th IMAPS/ACerS International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies 2008, CICMT 2008. p. 475-477 3 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Aerosols
Light absorption
Doping (additives)
Infrared radiation
Wavelength
3 Citations (Scopus)

Photodetector using surface-plasmon antenna for optical interconnect

Ohashi, K. & Fujikata, J., 2008, Materials Research Society Symposium Proceedings. Vol. 1145. p. 21-32 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

optical interconnects
Optical interconnects
Photodetectors
Photodiodes
photometers
4 Citations (Scopus)

Waveguide-integrated Si nano-photodiode with surface-plasmon antenna and its application to on-chip optical clock signal distribution

Fujikata, J., Nose, K., Ushida, J., Nishi, K., Kinoshita, M., Shimizu, T., Ueno, T., Okamoto, D., Gomyo, A., Mizuno, M., Tsuchizawa, T., Watanabe, T., Yamada, K., Itabashi, S. & Ohashi, K., 2008, 2008 5th International Conference on Group IV Photonics, GFP. p. 176-178 3 p. 4638136

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photodiodes
Clocks
Waveguides
Antennas
Metals
2007
3 Citations (Scopus)

A silicon photonics approach for the nanotechnology era

Ohashi, K., Nishi, K., Shimizu, T., Nakada, M., Fujikata, J., Ushida, J., Gomyo, A., Ishi, T., Nose, K., Mizuno, M., Kinoshita, M., Suzuki, N., Okamoto, D., Yukawa, H., Tsuchizawa, T., Watanabe, T., Yamada, K., Itabashi, S. & Akedo, J., 2007, Technical Digest - International Electron Devices Meeting, IEDM. p. 787-790 4 p. 4419065

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Optical interconnects
Nanotechnology
Photonics
Silicon
Light modulators
2 Citations (Scopus)

Development of nano-photodiodes with a surface plasmon antenna

Nishi, K., Fujikata, J., Ishi, T., Okamoto, D. & Ohashi, K., 2007, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS. p. 574-575 2 p. 4382536

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photodiodes
Antennas
1 Citation (Scopus)

Dielectric characteristics of PZT films prepared by aerosol deposition in millimeter wave range

Nakada, M., Ohashi, K., Tsuda, H., Kawate, E. & Akedo, J., 2007, IEEE International Symposium on Applications of Ferroelectrics. p. 528-530 3 p. 4393319

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Aerosols
Millimeter waves
Dielectric properties
Spectroscopy
Ferroelectric materials
4 Citations (Scopus)

Highly efficient surface-plasmon antenna and its application to Si nano-photodiode

Fujikata, J., Ishi, T., Okamoto, D., Nishi, K. & Ohashi, K., 2007, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS. p. 476-477 2 p. 4054264

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photodiodes
Antennas
Metals
Semiconductor materials
3 Citations (Scopus)

Optical characteristics of a PZT waveguide fabricated using aerosol deposition for optical modulators on LSI chips

Shimizu, T., Nakada, M., Tsuda, H., Akedo, J., Nishi, K. & Ohashi, K., 2007, IEEE International Symposium on Applications of Ferroelectrics. p. 831-833 3 p. 4393418

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Light modulators
Optical waveguides
Aerosols
Waveguides
Optical losses

Optical properties of Pb(Zr,Ti)O3films prepared by aerosol deposition

Tsuda, H., Nakada, M., Akedo, J. & Ohashi, K., 2007, IEEE International Symposium on Applications of Ferroelectrics. p. 829-830 2 p. 4393417

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Aerosols
Optical properties
Infrared radiation
Wavelength
Light absorption
4 Citations (Scopus)

PLZT electro-optic modulators on Si substrates using aerosol deposition for on-chip optical interconnections

Shimizu, T., Nakada, M., Tsuda, H., Akedo, J., Nishi, K. & Ohashi, K., 2007, IEEE International Conference on Group IV Photonics GFP. p. 210-212 3 p. 4347718

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Optical interconnects
Electrooptical effects
Aerosols
Modulators
Lanthanum
4 Citations (Scopus)

Si nano-photodiode with a surface-plasmon antenna for sion waveguide-integrated structure

Fujikata, J., Ushida, J., Okamoto, D., Gomyo, A., Nishi, K., Tsuchizawa, T., Watanabe, T., Yamada, K., Itabashi, S. & Ohashi, K., 2007, Conference Proceedings - Lasers and Electro-Optics Society Annual Meeting-LEOS. p. 929-930 2 p. 4382715

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photodiodes
Waveguides
Antennas
Metals
Semiconductor materials

Ultra small fiber-optic electric field probe fabricated by aerosol deposition

Iwanami, M., Nakada, M., Tsuda, H., Ohashi, K. & Akedo, J., 2007, IEEE International Symposium on Applications of Ferroelectrics. p. 834-837 4 p. 4393419

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Electrooptical effects
Aerosols
Fiber optics
Electric fields
Microstrip lines
2006

Aerosol deposition fabrication of transparent electro-optic films for optical modulator

Nakada, M., Ohashi, K., Tsuda, H. & Akedo, J., 2006, IMAPS/ACerS - 2nd International Conference and Exhibition on Ceramic Interconnect and Ceramic Microsystems Technologies, CICMT 2006. p. 482-487 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Light modulators
Electrooptical effects
Aerosols
Fabrication
Ferroelectric materials

Development and applications of a Si nano-photodiode with a surface plasmon antenna

Ohashi, K., Fujikata, J., Ishi, T., Okamoto, D., Makita, K. & Nishi, K., 2006, Proceedings of SPIE - The International Society for Optical Engineering. Vol. 6352 II. 63521U

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Photodiodes
photodiodes
antennas
Antennas
Silicon
10 Citations (Scopus)

Optical interconnect technologies for high-speed VLSI chips using silicon nano-photonics

Ohashi, K., Fujikata, J., Nakada, M., Ishi, T., Nishi, K., Yamada, H., Fukaishi, M., Mizuno, M., Nose, K., Ogura, I., Urino, Y. & Baba, T., 2006, Digest of Technical Papers - IEEE International Solid-State Circuits Conference. 1696224

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Optical interconnects
Electrooptical effects
Photodiodes
Optoelectronic devices
Photonics
1 Citation (Scopus)

Silicon nano-photodiodes

Ohashi, K., Fujikata, J., Ishi, T., Nishi, K., Mizuno, M., Nose, K., Ishihara, K. & Baba, T., 2006, IEEE International Conference on Group IV Photonics GFP. p. 176-178 3 p. 1708204

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Silicon
Photodiodes
Data communication systems
Clocks
Antennas

Surface plasmon resonance in a metallic pillar array on a metallic substrate in the terahertz frequency region

Okamoto, T., Kawata, S., Minamide, H., Ito, H. & Ohashi, K., 2006, Optics InfoBase Conference Papers. Optical Society of America

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Plasmons
Surface plasmon resonance
plasmons
surface plasmon resonance
Substrates
2005
5 Citations (Scopus)

Fabry-Perot optical modulator fabricated by aerosol deposition

Nakada, M., Ohashi, K., Tsuda, H. & Akedo, J., 2005, Proceedings of SPIE - The International Society for Optical Engineering. Katagiri, Y. (ed.). Vol. 6050. 605004

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Light modulators
Aerosols
modulators
aerosols
Electrooptical effects

Time-resolved photoluminescence measurement of exciton and biexciton in an InAs/GaAs single quantum dot

Kono, S., Kirihara, A., Tomita, A., Nakamura, K., Nishi, K., Saito, H., Fujikata, J. & Ohashi, K., 2005, IQEC, International Quantum Electronics Conference Proceedings. Vol. 2005. p. 259-260 2 p. 1560877

Research output: Chapter in Book/Report/Conference proceedingConference contribution

quantum dots
excitons
photoluminescence
life (durability)
luminescence
2004
33 Citations (Scopus)

Miniaturized thin-film magnetic field probe with high spatial resolution for LSI chip measurement

Ando, N., Masuda, N., Tamaki, N., Kuriyama, T., Kato, K., Saito, M., Saito, S., Ohashi, K. & Yamaguchi, M., 2004, IEEE International Symposium on Electromagnetic Compatibility. Vol. 2. p. 357-362 6 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

spatial resolution
chips
Magnetic fields
Thin films
probes
2000

CoNiFe write heads with a 10-μm core for high-speed recording

Nonaka, Y., Honjo, H., Toba, T., Saitho, S., Ishi, T., Saito, M., Ishiwata, N. & Ohashi, K., 2000, Digests of the Intermag Conference. IEEE

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Eddy currents

Read head structure for magnetic tunneling junction

Hayashi, K., Fukami, E., Nagahara, K., Nakada, M., Ohashi, K., Matsuda, K., Kamijo, A., Mitsuzuka, T. & Tsuge, H., 2000, Digests of the Intermag Conference. IEEE

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Tunnelling magnetoresistance
1999

Write performance of heads with 2.1-TESLA CoNiFe pole

Ohashi, K., Morita, N., Tsuda, T. & Nonaka, Y., 1999, Digests of the Intermag Conference. IEEE

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Composite films
Coercive force
Poles
1990
5 Citations (Scopus)

Effect of plated NIFE composition on domain configuration

Ohashi, K., Ito, M. & Maruyama, T., 1990, Proceedings - The Electrochemical Society. Romankiw, L. T. & Herman, D. A. (eds.). 8 ed. Publ by Electrochemical Soc Inc, Vol. 90. p. 247-258 12 p.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Magnetic films
Annealing
Magnetic domains
Magnetostriction
Domain walls