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Yoshimichi Ohki
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Journal Articles

Dielectric properties of nanocomposites based on epoxy resin and HBP/plasma modified nanosilica

Guoqing Yang, Jiaxin Li, Yoshimichi Ohki, Deyi Wang, Geng Liu, Yang Liu, Kai Tao
Journal: AIP Advances
AIP Advances 10, 045015 (2020)
https://doi.org/10.1063/1.5103237
Published: April 2020
View article titled, Dielectric properties of nanocomposites based on epoxy resin and HBP/plasma modified nanosilica
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Includes: Supplementary data
Journal Articles

Terahertz absorption spectra of several polymer nanocomposites indicating polymer-filler interactions

Keigo Mori, Tomofumi Seki, Naoshi Hirai, Yoshimichi Ohki
Journal: AIP Advances
AIP Advances 9, 105109 (2019)
https://doi.org/10.1063/1.5117182
Published: October 2019
View article titled, Terahertz absorption spectra of several polymer nanocomposites indicating polymer-filler interactions
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Journal Articles

Effects of ultraviolet photon irradiation and subsequent thermal treatments on solution-processed amorphous indium gallium zinc oxide thin films

Yuki Takamori, Takaaki Morimoto, Nobuko Fukuda, Yoshimichi Ohki
Journal: AIP Advances
AIP Advances 8, 115304 (2018)
https://doi.org/10.1063/1.5049618
Published: November 2018
View article titled, Effects of ultraviolet photon irradiation and subsequent thermal treatments on solution-processed amorphous indium gallium zinc oxide thin films
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Journal Articles

Terahertz spectral change associated with glass transition of poly-ε-caprolactone

Marina Komatsu, Maya Mizuno, Shingo Saito, Kaori Fukunaga, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 117, 133102 (2015)
https://doi.org/10.1063/1.4916746
Published: April 2015
View article titled, Terahertz spectral change associated with glass transition of poly-ε-caprolactone
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Journal Articles

Effects of ultraviolet photon irradiation on the transition metal impurities in LaAlO3

Daiki Yamasaka, Kenta Tamagawa, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 110, 074103 (2011)
https://doi.org/10.1063/1.3641974
Published: October 2011
View article titled, Effects of ultraviolet photon irradiation on the transition metal impurities in LaAlO<sub>3</sub>
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Journal Articles

Structure of latent tracks in rutile single crystal of titanium dioxide induced by swift heavy ions

Koichi Awazu, Xiaomin Wang, Makoto Fujimaki, Tetsuo Komatsubara, Takahiro Ikeda, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 100, 044308 (2006)
https://doi.org/10.1063/1.2229432
Published: August 2006
View article titled, Structure of latent tracks in rutile single crystal of titanium dioxide induced by swift heavy ions
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Journal Articles

Mechanisms of several photoluminescence bands in hafnium and zirconium silicates induced by ultraviolet photons

Toshihide Ito, Hiromitsu Kato, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 99, 094106 (2006)
https://doi.org/10.1063/1.2199977
Published: May 2006
View article titled, Mechanisms of several photoluminescence bands in hafnium and zirconium silicates induced by ultraviolet photons
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Journal Articles

Synthesis and characterization of metal-dielectric composites with copper nanoparticles embedded in a glass matrix: A multitechnique approach

Kristina E. Lipinska-Kalita, Denise M. Krol, Russell J. Hemley, Gino Mariotto, Patricia E. Kalita, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 98, 054301 (2005)
https://doi.org/10.1063/1.2011776
Published: September 2005
View article titled, Synthesis and characterization of metal-dielectric composites with copper nanoparticles embedded in a glass matrix: A multitechnique approach
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Journal Articles

Temperature effects on luminescence properties of Cr 3 + ions in alkali gallium silicate nanostructured media

Kristina E. Lipinska-Kalita, Denise M. Krol, Russell J. Hemley, Patricia E. Kalita, Cedric L. Gobin, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 98, 054302 (2005)
https://doi.org/10.1063/1.2012509
Published: September 2005
View article titled, Temperature effects on luminescence properties of Cr 3 + ions in alkali gallium silicate nanostructured media
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Journal Articles

Fabrication of two- and three-dimensional photonic crystals of titania with submicrometer resolution by deep x-ray lithography

Koichi Awazu, Xiaomin Wang, Makoto Fujimaki, Taketo Kuriyama, Akihide Sai, Yoshimichi Ohki, Hiroaki Imai
Journal: Journal of Vacuum Science & Technology B
J. Vac. Sci. Technol. B 23, 934–939 (2005)
https://doi.org/10.1116/1.1924421
Published: May 2005
View article titled, Fabrication of two- and three-dimensional photonic crystals of titania with submicrometer resolution by deep x-ray lithography
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Journal Articles

Similarities in photoluminescence in hafnia and zirconia induced by ultraviolet photons

Toshihide Ito, Motohiro Maeda, Kazuhiko Nakamura, Hiromitsu Kato, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 97, 054104 (2005)
https://doi.org/10.1063/1.1856220
Published: February 2005
View article titled, Similarities in photoluminescence in hafnia and zirconia induced by ultraviolet photons
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Journal Articles

Ferroelectricity of single-crystalline, monodisperse lead zirconate titanate nanoparticles of 9 nm in diameter

Kwang Soo Seol, Kazuo Takeuchi, Yoshimichi Ohki
Journal: Applied Physics Letters
Appl. Phys. Lett. 85, 2325–2327 (2004)
https://doi.org/10.1063/1.1794355
Published: September 2004
View article titled, Ferroelectricity of single-crystalline, monodisperse lead zirconate titanate nanoparticles of 9 nm in diameter
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Journal Articles

Band-tail photoluminescence in hydrogenated amorphous silicon oxynitride and silicon nitride films

Hiromitsu Kato, Norihide Kashio, Yoshimichi Ohki, Kwang Soo Seol, Takashi Noma
Journal: Journal of Applied Physics
J. Appl. Phys. 93, 239–244 (2003)
https://doi.org/10.1063/1.1529292
Published: January 2003
View article titled, Band-tail photoluminescence in hydrogenated amorphous silicon oxynitride and silicon nitride films
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Journal Articles

Gas-phase production of monodisperse lead zirconate titanate nanoparticles

Kwang Soo Seol, Satoshi Tomita, Kazuo Takeuchi, Takeshi Miyagawa, Takahiro Katagiri, Yoshimichi Ohki
Journal: Applied Physics Letters
Appl. Phys. Lett. 81, 1893–1895 (2002)
https://doi.org/10.1063/1.1505744
Published: September 2002
View article titled, Gas-phase production of monodisperse lead zirconate titanate nanoparticles
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Journal Articles

Plasma-enhanced chemical vapor deposition and characterization of high-permittivity hafnium and zirconium silicate films

Hiromitsu Kato, Tomohiro Nango, Takeshi Miyagawa, Takahiro Katagiri, Kwang Soo Seol, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 92, 1106–1111 (2002)
https://doi.org/10.1063/1.1487911
Published: July 2002
View article titled, Plasma-enhanced chemical vapor deposition and characterization of high-permittivity hafnium and zirconium silicate films
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Journal Articles

Photo-induced refractive index change in hydrogenated amorphous silicon oxynitride

Hiromitsu Kato, Makoto Fujimaki, Takashi Noma, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 91, 6350–6353 (2002)
https://doi.org/10.1063/1.1461894
Published: May 2002
View article titled, Photo-induced refractive index change in hydrogenated amorphous silicon oxynitride
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Journal Articles

Origin of photoluminescence around 2.6–2.9 eV in silicon oxynitride

Takashi Noma, Kwang Soo Seol, Hiromitsu Kato, Makoto Fujimaki, Yoshimichi Ohki
Journal: Applied Physics Letters
Appl. Phys. Lett. 79, 1995–1997 (2001)
https://doi.org/10.1063/1.1405806
Published: September 2001
View article titled, Origin of photoluminescence around 2.6–2.9 eV in silicon oxynitride
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Journal Articles

Visible electroluminescence in hydrogenated amorphous silicon oxynitride

Hiromitsu Kato, Akira Masuzawa, Hidefumi Sato, Takashi Noma, Kwang Soo Seol, Makoto Fujimaki, Yoshimichi Ohki
Journal: Journal of Applied Physics
J. Appl. Phys. 90, 2216–2220 (2001)
https://doi.org/10.1063/1.1388864
Published: September 2001
View article titled, Visible electroluminescence in hydrogenated amorphous silicon oxynitride
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Journal Articles

Ion-implantation-induced densification in silica-based glass for fabrication of optical fiber gratings

Makoto Fujimaki, Yoshitaka Nishihara, Yoshimichi Ohki, John L. Brebner, Sjoerd Roorda
Journal: Journal of Applied Physics
J. Appl. Phys. 88, 5534–5537 (2000)
https://doi.org/10.1063/1.1315616
Published: November 2000
View article titled, Ion-implantation-induced densification in silica-based glass for fabrication of optical fiber gratings
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Journal Articles

Effect of annealing on Ge-doped SiO 2 thin films

Makoto Fujimaki, Shigeyuki Shimoto, Nahoko Miyazaki, Yoshimichi Ohki, Kwang Soo Seol, Kazuo Imamura
Journal: Journal of Applied Physics
J. Appl. Phys. 86, 5270–5273 (1999)
https://doi.org/10.1063/1.371525
Published: November 1999
View article titled, Effect of annealing on Ge-doped SiO 2 thin films
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