Keishi Ohashi

上級研究員(研究院教授)

  • 1644 Citations
  • 20 h-Index
1979 …2017
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Research Output 1979 2017

  • 1644 Citations
  • 20 h-Index
  • 53 Article
  • 29 Conference contribution
  • 1 Chapter
2017
1 Citation (Scopus)

Review of Physiological Balance Sensing in an Unobtrusive Manner

Ohashi, K., Kuroiwa, S., Hideshima, S., Nakanishi, T. & Osaka, T., 2017 Sep 1, In : Electronics and Communications in Japan. 100, 9, p. 50-55 6 p.

Research output: Contribution to journalArticle

Biosensor
bioinstrumentation
Biosensors
Sensing
Immunoglobulin
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

Review of physiological balance sensing in an unobtrusive manner

Ohashi, K., Kuroiwa, S., Hideshima, S., Nakanishi, T. & Osaka, T., 2016, In : IEEJ Transactions on Sensors and Micromachines. 136, 8, p. 357-361 5 p.

Research output: Contribution to journalArticle

Biosensors
Hormones
Field effect transistors
Monitoring
Communication
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
2013
10 Citations (Scopus)

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

Narita, K., Kuribayashi, R., Altintas, E., Someya, H., Tsuda, K., Ohashi, K., Tabuchi, T., Okubo, S., Imazato, M. & Komatsubara, S., 2013, In : Sensors and Actuators, A: Physical. 195, p. 142-147 6 p.

Research output: Contribution to journalArticle

Bolometers
Carbon Nanotubes
Sensor arrays
Infrared imaging
bolometers
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
5 Citations (Scopus)

InGaAs nano-photodiode enhanced using polarization-insensitive surface-plasmon antennas

Okamoto, D., Fujikata, J. & Ohashi, K., 2011 Dec, In : Japanese Journal of Applied Physics. 50, 12, 120201.

Research output: Contribution to journalArticle

Photodiodes
photodiodes
antennas
Polarization
Antennas
1 Citation (Scopus)

Introduction to the issue on photonic packaging and integration technologies

García-Blanco, S. M., Bakir, M. S., Matthews, K. I., Ohashi, K. & Horst, F., 2011 May, In : IEEE Journal on Selected Topics in Quantum Electronics. 17, 3, p. 495-497 3 p., 5749270.

Research output: Contribution to journalArticle

packaging
Photonics
Packaging
photonics
1 Citation (Scopus)

Silicon (Si) and germanium (Ge) in optical devices

Ohashi, K., 2011 Feb, Silicon-Germanium (SiGe) Nanostructures. Elsevier Ltd., p. 551-574 24 p.

Research output: Chapter in Book/Report/Conference proceedingChapter

Germanium
Silicon
Optical devices
Photonics
Electronic equipment

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
34 Citations (Scopus)

Vertical-coupling optical interface for on-chip optical interconnection

Yamada, H., Nozawa, M., Kinoshita, M. & Ohashi, K., 2011 Jan 17, In : Optics Express. 19, 2, p. 698-703 6 p.

Research output: Contribution to journalArticle

optical coupling
chips
optical fibers
gratings
misalignment
2010

ECS Transactions: Preface

Deen, M. J., Fang, Q., Jagadish, C. & Ohashi, K., 2010, In : Unknown Journal. 28, 14

Research output: Contribution to journalArticle

2009

Challenges and prospects for applications in the chips (LSI-Chip optical interconnection)

Kinoshita, M. & Ohashi, K., 2009 Aug, In : Journal of Japan Institute of Electronics Packaging. 12, 5, p. 452-457 6 p.

Research output: Contribution to journalArticle

Optical interconnects
3 Citations (Scopus)

Gigahertz-rate optical modulation on mach-zehnder plzt electro-optic modulators formed on silicon substrates by aerosol deposition

Shimizu, T., Nakada, M., Tsuda, H., Miyazaki, H., Akedo, J. & Ohashi, K., 2009, In : IEICE Electronics Express. 6, 23, p. 1669-1675 7 p.

Research output: Contribution to journalArticle

Light modulation
light modulation
Silicon
Electrooptical effects
Aerosols
4 Citations (Scopus)

Lanthanum-modified lead zirconate titanate electro-optic modulators fabricated using aerosol deposition for LSI interconnects

Nakada, M., Shimizu, T., Miyazaki, H., Tsuda, H., Akedo, J. & Ohashi, K., 2009, In : Japanese Journal of Applied Physics. 48, 9 Part 2

Research output: Contribution to journalArticle

large scale integration
Lanthanum
Electrooptical effects
lanthanum
Modulators
85 Citations (Scopus)

On-chip optical interconnect

Ohashi, K., Nishi, K., Shimizu, T., Nakada, M., Fujikata, J., Ushida, J., Toru, S., Nose, K., Mizuno, M., Yukawa, H., Kinoshita, M., Suzuki, N., Gomyo, A., Ishi, T., Okamoto, D., Furue, K., Ueno, T., Tsuchizawa, T., Watanabe, T., Yamada, K. & 2 others, Itabashi, S. I. & Akedo, J., 2009 Jul, In : Proceedings of the IEEE. 97, 7, p. 1186-1196 11 p., 5075754.

Research output: Contribution to journalArticle

Optical interconnects
LSI circuits
Photodiodes
Modulators
Operational amplifiers
2008
11 Citations (Scopus)

Low-loss silicon oxynitride waveguides and branches for the 850-nm-wavelength region

Tsuchizawa, T., Watanabe, T., Yamada, K., Fukuda, H., Itabashi, S., Fujikata, J., Gomyo, A., Ushida, J., Okamoto, D., Nishi, K. & Ohashi, K., 2008 Aug 22, In : Japanese Journal of Applied Physics. 47, 8 PART 2, p. 6739-6743 5 p.

Research output: Contribution to journalArticle

oxynitrides
Waveguides
waveguides
Silicon
Wavelength
22 Citations (Scopus)

LSI on-chip optical interconnection with Si nano-photonics

Fujikata, J., Nishi, K., Gomyo, A., Ushida, J., Ishi, T., Yukawa, H., Okamoto, D., Nakada, M., Shimizu, T., Kinoshita, M., Nose, K., Mizuno, M., Tsuchizawa, T., Watanabe, T., Yamada, K., Itabashi, S. & Ohashi, K., 2008 Feb, In : IEICE Transactions on Electronics. E91-C, 2, p. 131-137 7 p.

Research output: Contribution to journalArticle

Optical interconnects
Optical devices
Photonics
Clocks
Photonic devices

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
15 Citations (Scopus)

Numerical study of near-infrared photodetectors with surface-plasmon antenna for optical communication

Okamoto, D., Fujikata, J., Nishi, K. & Ohashi, K., 2008 Apr 25, In : Japanese Journal of Applied Physics. 47, 4 PART 2, p. 2921-2923 3 p.

Research output: Contribution to journalArticle

Optical communication
Photodetectors
photometers
optical communication
antennas
5 Citations (Scopus)

Optical properties of Pb(Zr,Ti)O3 films prepared by aerosol deposition

Tsuda, H., Nakada, M., Akedo, J. & Ohashi, K., 2008 May, In : IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 55, 5, p. 975-979 5 p., 4524970.

Research output: Contribution to journalArticle

Aerosols
aerosols
Optical properties
optical properties
Light absorption
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
22 Citations (Scopus)

Waveguide-integrated Si nano-photodiode with surface-plasmon antenna and its application to on-chip optical clock 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 Feb, In : Applied Physics Express. 1, 2, 022001.

Research output: Contribution to journalArticle

Photodiodes
clocks
photodiodes
Clocks
Waveguides
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
20 Citations (Scopus)

Aerosol deposition on transparent electro-optic films for optical modulators

Nakada, M., Tsuda, H., Ohashi, K. & Akedo, J., 2007 Jan, In : IEICE Transactions on Electronics. E90-C, 1, p. 36-40 5 p.

Research output: Contribution to journalArticle

Light modulators
Electrooptical effects
Aerosols
Optical devices
Particles (particulate matter)
3 Citations (Scopus)

Application of electronic devices for aerosol deposition methods

Nakada, M., Kawakami, T., Iwanami, M. & Ohashi, K., 2007, In : NEC Technical Journal. 2, 1, p. 76-80 5 p.

Research output: Contribution to journalArticle

Aerosols
Piezoelectric devices
Optical devices
Oxides
Oxide films
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
5 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

Si nano-photonics innovate next generation network systems and LSI technologies

Nishi, K., Urino, Y. & Ohashi, K., 2007, In : NEC Technical Journal. 2, 1, p. 67-71 5 p.

Research output: Contribution to journalArticle

Next generation networks
Photonics
Nanophotonics
Optical devices
Electric power utilization
14 Citations (Scopus)

Ultra small electro-optic field probe fabricated by aerosol deposition

Iwanami, M., Nakada, M., Tsuda, H., Ohashi, K. & Akedo, J., 2007 Jan 25, In : IEICE Electronics Express. 4, 2, p. 26-32 7 p.

Research output: Contribution to journalArticle

Electrooptical effects
Aerosols
electro-optics
aerosols
large scale integration

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
4 Citations (Scopus)

Ultra small magneto-optic field probe fabricated by aerosol deposition

Iwanami, M., Nakada, M., Tsuda, H., Ohashi, K. & Akedo, J., 2007 Sep 10, In : IEICE Electronics Express. 4, 17, p. 542-548 7 p.

Research output: Contribution to journalArticle

Magnetooptical effects
magneto-optics
Aerosols
aerosols
probes
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
72 Citations (Scopus)

Terahertz-wave near-field imaging with subwavelength resolution using surface-wave-assisted bow-tie aperture

Ishihara, K., Ohashi, K., Ikari, T., Minamide, H., Yokoyama, H., Shikata, J. I. & Ito, H., 2006, In : Applied Physics Letters. 89, 20, 201120.

Research output: Contribution to journalArticle

bows
surface waves
near fields
apertures
spatial resolution
2005
14 Citations (Scopus)
Ferroelectric films
Aerosols
aerosols
Permittivity
permittivity
21 Citations (Scopus)
Electrooptical effects
electro-optics
Aerosols
aerosols
Annealing
14 Citations (Scopus)

Excitonic molecule in a quantum dot: Photoluminescence lifetime of a single InAs GaAs quantum dot

Kono, S., Kirihara, A., Tomita, A., Nakamura, K., Fujikata, J., Ohashi, K., Saito, H. & Nishi, K., 2005 Oct 15, In : Physical Review B - Condensed Matter and Materials Physics. 72, 15, 155307.

Research output: Contribution to journalArticle

Excitons
Semiconductor quantum dots
Photoluminescence
quantum dots
excitons
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
23 Citations (Scopus)
Light transmission
apexes
gratings
polaritons
Throughput