Papers - HASEGAWA Takayuki

Effects of electric field screening induced by photogenerated carriers on terahertz wave measurement in a GaAs epitaxial structure

Takayuki Hasegawa and Osamu Kojima  ( Multiple Authorship )

Applied Physics Express   17   051006-1 - 051006-4   2024.05

Research paper (scientific journal)  English

DOI

Quantum beat of heavy-hole and light-hole excitons originating from interband Stark-ladder transitions in a biased GaAs/AlAs superlattice

Takayuki Hasegawa  ( Single Author )

Applied Physics Express   16 ( 2 ) 021007-1 - 021007-4   2023.02

Research paper (scientific journal)  English

DOI

Control of electric field screening effects induced by photogenerated carriers for studies on ultrafast transient phenomena

Takayuki Hasegawa and Osamu Kojima  ( Multiple Authorship )

Journal of the Japan Society of Infraed Science and Technology   32 ( 2 ) 52 - 57   2023.02

Research paper (scientific journal)  Japanese

Electric field dependence of terahertz wave emission in temperature-controlled GaAs epitaxial films

Takayuki Hasegawa, Masaya Marui, and Yoshihito Tanaka  ( Multiple Authorship )

Applied Physics Express   15 ( 5 ) 051001-1 - 051001-4   2022.04

Research paper (scientific journal)  English

DOI

Characteristics of terahertz wave emissions under the coexistence of different sub-picosecond transient phenomena in GaAs epitaxial films

Takayuki Hasegawa, Yuta Okushima, Yoshihito Tanaka  ( Multiple Authorship )

Applied Physics Express   14 ( 4 ) 041005-1 - 041005-4   2021.03

Research paper (scientific journal)  English

DOI

Photocurrent characteristics of nanstructured thin films consisting of surface-modified silicon nanoparticles

R. Yoshikado, T. Hasegawa, Y. Tanaka, S. Tsubota, and S. Sato  ( Multiple Authorship )

Journal of Physics: Conference Series   1220 ( 1 ) 012048   2019.05

Research paper (international conference proceedings)  English

DOI

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

Y. Tanaka, M. Nagashima, K. Tanaka, T. Hasegawa, Y. Fukuyama, and N. Yasuda  ( Multiple Authorship )

AIP Conference Proceedings   2054 ( 1 ) 040009   2019.01

Research paper (international conference proceedings)  English

DOI

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

T. Hasegawa, N. Fujimura, and M. Nakayama  ( Multiple Authorship )

Applied Physics Letters   111 ( 19 ) 192901   2017.11

Research paper (scientific journal)  English

DOI

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

Y. Tanaka, R. Matsushita, R. Shiraishi, T. Hasegawa, K. Ishikawa, K. Sawada, Y. Kohmura, and I. Takahashi  ( Multiple Authorship )

AIP Conference Proceedings   1741 ( 1 ) 040029   2016.07

Research paper (international conference proceedings)  English

DOI

Unique characteristics of nonequilibrium carrier transport dynamics in an undoped GaAs/n-type GaAs epitaxial structure

T. Hasegawa and M. Nakayama  ( Multiple Authorship )

Applied Physics Express   9 ( 7 ) 071001   2016.06

Research paper (scientific journal)  English

DOI

High-sensitivity polarization modulation reflectance spectroscopy of cavity polaritons in a ZnO microcavity

T. Hasegawa, R. Kishimoto, Y. Takagi, T. Kawase, D. Kim, and M. Nakayama  ( Multiple Authorship )

Applied Physics Express   7 ( 3 ) 032003   2014.03

Research paper (scientific journal)  English

DOI

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

T. Hasegawa, Y. Takagi, H. Takeuchi, H. Yamada, M. Hata, and M. Nakayama  ( Multiple Authorship )

Journal of Applied Physics   113 ( 20 ) 203506   2013.05

Research paper (scientific journal)  English

DOI

Photoluminescence dynamics of excitons at the mini-Brillouin-zone edge in a GaAs/AlAs superlattice

M. Nakayama, T. Yamashita, and T. Hasegawa  ( Multiple Authorship )

Journal of Crystal Growth   378 ( 1 ) 61 - 64   2013.01

Research paper (international conference proceedings)  English

DOI

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

T. Hasegawa, N. Masumoto, T. Harada, T. Makino, and Y. Takagi  ( Multiple Authorship )

Review of Scientific Instruments   83 ( 10 ) 103108   2012.10

Research paper (scientific journal)  English

DOI

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

T. Hasegawa, Y. Takagi, H. Takeuchi, H. Yamada, M. Hata, and M. Nakayama  ( Multiple Authorship )

Applied Physics Letters   100 ( 21 ) 211902   2012.05

Research paper (scientific journal)  English

DOI

Frequency-tunable quantum beats under a Franz-Keldysh oscillation condition in a GaAs/Al_xGa_1-xAs superlattice

T. Hasegawa, Y. Takagi, and M. Nakayama  ( Multiple Authorship )

Applied Physics Express   5 ( 4 ) 041202   2012.04

Research paper (scientific journal)  English

DOI

Electric field effects on excitonic quantum beats in a single quantum well embedded in a GaAs/AlAs superlattice

T. Hasegawa, Y. Takagi, and M. Nakayama  ( Multiple Authorship )

Physical Review B   83 ( 20 ) 205309   2011.05

Research paper (scientific journal)  English

DOI

Upconversion of photoluminescence due to subband resonances in a GaAs/AlAs multiple quantum well structure

T. Hasegawa, S. Okamoto, and M. Nakayama  ( Multiple Authorship )

Physica E   42 ( 10 ) 2648 - 2651   2009.10

Research paper (international conference proceedings)  English

DOI

Photoluminescence properties of exciton-exciton scattering in a GaAs/AlAs multiple quantum well

M. Nakayama, T. Hirao, and T. Hasegawa  ( Multiple Authorship )

Physica E   42 ( 10 ) 2644 - 2647   2009.10

Research paper (international conference proceedings)  English

DOI

Characteristics of photoluminescence due to exciton-exciton scattering in GaAs/AlAs multiple quantum wells

M. Nakayama, T. Hirao, and T. Hasegawa  ( Multiple Authorship )

Journal of Applied Physics   105 ( 12 ) 123525   2009.06

Research paper (scientific journal)  English

DOI