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Takayuki Hasegawa
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Journal Articles

Time-resolved optical spectroscopy of a GaAs single crystal irradiated by SR X-ray pulses

Yoshihito Tanaka, Maki Nagashima, Kenta Tanaka, Takayuki Hasegawa, Yoshimitsu Fukuyama, Nobuhiro Yasuda
Journal: AIP Conference Proceedings
AIP Conf. Proc. 2054, 040009 (2019)
https://doi.org/10.1063/1.5084610
Published: January 2019
View article titled, Time-resolved optical spectroscopy of a GaAs single crystal irradiated by SR X-ray pulses
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Journal Articles

Ultrafast dynamics of coherent optical phonon correlated with the antiferromagnetic transition in a hexagonal YMnO3 epitaxial film

Takayuki Hasegawa, Norifumi Fujimura, Masaaki Nakayama
Journal: Applied Physics Letters
Appl. Phys. Lett. 111, 192901 (2017)
https://doi.org/10.1063/1.5003269
Published: November 2017
View article titled, Ultrafast dynamics of coherent optical phonon correlated with the antiferromagnetic transition in a hexagonal YMnO<sub>3</sub> epitaxial film
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Journal Articles

X-ray beam transfer between hollow fibers for long-distance transport

Yoshihito Tanaka, Ryuki Matsushita, Ryutaro Shiraishi, Takayuki Hasegawa, Kiyoshi Ishikawa, Kei Sawada, Yoshiki Kohmura, Isao Takahashi
Journal: AIP Conference Proceedings
AIP Conf. Proc. 1741, 040029 (2016)
https://doi.org/10.1063/1.4952901
Published: July 2016
View article titled, X-ray beam transfer between hollow fibers for long-distance transport
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Journal Articles

Characteristics of ultrafast optical responses originating from non-equilibrium carrier transport in undoped GaAs/n-type GaAs epitaxial structures

Takayuki Hasegawa, Yoshihiro Takagi, Hideo Takeuchi, Hisashi Yamada, Masahiko Hata, Masaaki Nakayama
Journal: Journal of Applied Physics
J. Appl. Phys. 113, 203506 (2013)
https://doi.org/10.1063/1.4807405
Published: May 2013
View article titled, Characteristics of ultrafast optical responses originating from non-equilibrium carrier transport in undoped GaAs/<em>n</em>-type GaAs epitaxial structures
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Journal Articles

Non-degenerated photoluminescence excitation correlation spectroscopy using an optical sampling technique

Takayuki Hasegawa, Naofumi Masumoto, Tomonori Harada, Takayuki Makino, Yoshihiro Takagi
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 83, 103108 (2012)
https://doi.org/10.1063/1.4759133
Published: October 2012
View article titled, Non-degenerated photoluminescence excitation correlation spectroscopy using an optical sampling technique
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Journal Articles

Ultrafast optical response originating from carrier-transport processes in undoped GaAs/n-type GaAs epitaxial structures

Takayuki Hasegawa, Yoshihiro Takagi, Hideo Takeuchi, Hisashi Yamada, Masahiko Hata, Masaaki Nakayama
Journal: Applied Physics Letters
Appl. Phys. Lett. 100, 211902 (2012)
https://doi.org/10.1063/1.4720157
Published: May 2012
View article titled, Ultrafast optical response originating from carrier-transport processes in undoped GaAs/<em>n-</em>type GaAs epitaxial structures
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Journal Articles

Three-dimensionally stacked flexible integrated circuit: Amorphous oxide/polymer hybrid complementary inverter using n -type a-In–Ga–Zn–O and p -type poly-(9,9-dioctylfluorene-co-bithiophene) thin-film transistors

Kenji Nomura, Takashi Aoki, Kiyoshi Nakamura, Toshio Kamiya, Takashi Nakanishi, Takayuki Hasegawa, Mutsumi Kimura, Takeo Kawase, Masahiro Hirano, Hideo Hosono
Journal: Applied Physics Letters
Appl. Phys. Lett. 96, 263509 (2010)
https://doi.org/10.1063/1.3458799
Published: June 2010
View article titled, Three-dimensionally stacked flexible integrated circuit: Amorphous oxide/polymer hybrid complementary inverter using n -type a-In–Ga–Zn–O and p -type poly-(9,9-dioctylfluorene-co-bithiophene) thin-film transistors
Open the PDF for Three-dimensionally stacked flexible integrated circuit: Amorphous oxide/polymer hybrid complementary inverter using n -type a-In–Ga–Zn–O and p -type poly-(9,9-dioctylfluorene-co-bithiophene) thin-film transistors in another window
Journal Articles

Enhancement of terahertz electromagnetic wave emission from an undoped Ga As ∕ n -type GaAs epitaxial layer structure

Hideo Takeuchi, Junichi Yanagisawa, Takayuki Hasegawa, Masaaki Nakayama
Journal: Applied Physics Letters
Appl. Phys. Lett. 93, 081916 (2008)
https://doi.org/10.1063/1.2976436
Published: August 2008
View article titled, Enhancement of terahertz electromagnetic wave emission from an undoped Ga As ∕ n -type GaAs epitaxial layer structure
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Journal Articles

Photocurrent bistability in a Ga As ∕ Al x Ga 1 − x As superlattice under resonant-coupling conditions of Wannier-Stark localization states

Takayuki Hasegawa, Masaaki Nakayama
Journal: Journal of Applied Physics
J. Appl. Phys. 101, 043512 (2007)
https://doi.org/10.1063/1.2434945
Published: February 2007
View article titled, Photocurrent bistability in a Ga As ∕ Al x Ga 1 − x As superlattice under resonant-coupling conditions of Wannier-Stark localization states
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Journal Articles

Wavefront Metrology for EUV Projection Optics by Soft X‐ray interferometry in the NewSUBARU

Masahito Niibe, Katsumi Sugisaki, Masashi Okada, Seima Kato, Chidane Ouchi, Takayuki Hasegawa
Journal: AIP Conference Proceedings
AIP Conf. Proc. 879, 1520–1523 (2007)
https://doi.org/10.1063/1.2436354
Published: January 2007
View article titled, Wavefront Metrology for EUV Projection Optics by Soft X‐ray interferometry in the NewSUBARU
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Journal Articles

Correlation between PL emission band and growth of oxide layer on surface of silicon nanocrystallites

Ikurou Umezu, Motohiko Koyama, Takayuki Hasegawa, Kimihisa Matsumoto, Mitsuru Inada, Akira Sugimura
Journal: AIP Conference Proceedings
AIP Conf. Proc. 772, 855–856 (2005)
https://doi.org/10.1063/1.1994375
Published: June 2005
View article titled, Correlation between PL emission band and growth of oxide layer on surface of silicon nanocrystallites
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Journal Articles

Wave-front errors of reference spherical waves in high-numerical aperture point diffraction interferometers

Yoshiyuki Sekine, Akiyoshi Suzuki, Masanobu Hasegawa, Chidane Ouchi, Shinichi Hara, Takayuki Hasegawa, Yoshiyuki Kuramoto, Seima Kato, Katsuhiko Murakami, Jun Saito, Kazuya Ota, Hiroyuki Kondo, Mikihiko Ishii, Jun Kawakami, Tetsuya Oshino, Katsumi Sugisaki, Yucong Zhu, Katsura Otaki, Zhiqiang Liu
Journal: Journal of Vacuum Science & Technology B
J. Vac. Sci. Technol. B 22, 104–108 (2004)
https://doi.org/10.1116/1.1640403
Published: January 2004
View article titled, Wave-front errors of reference spherical waves in high-numerical aperture point diffraction interferometers
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