Koki Kato, Kento Mimura, Masato Nishiwaki, Takayuki Hasegawa, Nobuya Hiroshiba, Kazuto Koike, Toshihiko Maemoto, and Akira Fujimoto
"Sensing of Nitrate Ions Using Graphene-Extended Gate Field-Effect Transistor"
13th International Conference on Nano-Molecular Electronics (ICNME2022)
Tokyo, Japan, Dec. 12-14 (2022).
Yoshiyuki Takagi, Takayuki Hasegawa, Masatoshi Koyama, Toshihiko Maemoto, and Shigehiko Sasa
"Study for enhanced THz radiation using InGaSb/InAs heterostructures"
14th Topical Workshop on Heterostructure Microelectronics (TWHM2022),
Hiroshima, Japan, Aug. 29 - Sept. 1 (2022).
Takayuki Hasegawa, Yuta Okushima, and Yoshihito Tanaka
"Coexistence dynamics of terahertz wave emissions in a GaAs nanostructured film"
The 21st International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON21),
Nara, Japan, July 14-19 (2019).
Takayuki Hasegawa, Yuta Okushima, Masaaki Nakayama, and Yoshihito Tanaka
"Excitation energy dependence of carrier-induced terahertz wave radiation in a GaAs epitaxial film"
The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials (EXCON2018),
Nara, Japan, July 8-13 (2018).
Ryu-ichi Yoshikado, Takayuki Hasegawa, Yoshihito Tanaka, Shuhei Tsubota, and Seiichi Sato
"Photocurrent characteristics of nanostructured thin films consisting of surface-modified silicon
nanoparticles"
The 12th International Conference on Excitonic and Photonic Processes in Condensed Matter and Nano Materials (EXCON2018),
Nara, Japan, July 8-13 (2018).
Yoshihito Tanaka, Masaaki Nagashima, Kenta Tanaka, Takayuki Hasegawa, Yoshimitsu. Fukuyama, and Nobuhiro Yasuda
"Time-resolved optical spectroscopy of a GaAs single crystal irradiated by SR X-ray pulses"
13th International Conference on Synchrotron Radiation Instrumentation (SRI2018), Taipei,
Taiwan, June 10-15 (2018).
Yuta Okushima, Takayuki Hasegawa, and Yoshihito Tanaka
"Quantitative detection of terahertz electromagnetic wave originating from carrier transport in semiconductor submicron structures"
The 6th Short-term Student Exchange Program, Aug. 25-28, 2016, Dong-A University, Korea.
Ayato Kimura, Hiroyuki Ohsumi, Yusuke Kousaka, Takayuki Hasegawa, and Yoshihito Tanaka
"Observation of chirality domain inFeSi irradiated by optical vortex"
The 6th Short-term Student Exchange Program, Aug. 25-28, 2016, Dong-A University, Korea.
Ryuki Matsushita, Ryutaro Shiraishi, Maki Nagashima, Ayato Kimura, Takayuki Hasegawa, Kiyoshi Ishikawa, Yoshihito Tanaka
"Development of time-resolved visible-infrared spectrometer in combination with synchrotron X-ray scattering experiments"
The 5th Short-term Student Exchange Program, Aug. 20-23, 2015, University of Hyogo, Japan.
Ryutaro Shiraishi, Ryuki Matsushita, Takehisa Ueta, Takayuki Hasegawa, Kiyoshi Ishikawa, Yoshihito Tanaka
(Best Presentation Award) "Time resolved X-ray diffraction study of a laser-illuminated silicon crystal using synchrotron radiation"
The 5th Short-term Student Exchange Program, Aug. 20-23, 2015, University of Hyogo, Japan.
Yoshihito Tanaka, Ryutaro Shiraishi, Ryuki Matsushita, Kiyoshi Ishikawa, Takayuki Hasegawa, Kei Sawada,
Yoshiki Kohmura, Isao Takahashi
"X-ray beam transfer between hollow fibers for the long-distance transport"
The 12th International Conference on Synchrotron Radiation Instrumentation (SRI 2015), July 6-10, 2015, New York, USA.
Takayuki Hasegawa, Hideo Takeuchi, Hisashi Yamada, Masahiko Hata, and Masaaki Nakayama
"Ultrafast optical responses caused by nonequilibrium transport process of carriers in GaAs epitaxial structures"
International Symposium on Recent Progress of Photonic Devices and Materials. Nov. 13-14, 2014, Kobe, Japan,
Ryutaro Shiraishi, Ryuki Matsushita, Ryo Kishimoto, Takayuki Hasegawa, Kiyoshi Ishikawa, and Yoshihito Tanaka
"Observation of photo-induced lattice dynamics of Si with time-resolved x-ray diffraction"
The 4nd Short-term Student Exchange Program, Aug. 21-24, 2014, Dong-A University, Korea.
Ryo Kishimoto and Takayuki Hasegawa
(Best Presentation Award) "Polarization modulation reflectance measurements of cavity polaritons in semiconductor microcavities"
The 3rd Short-term Student Exchange Program, Aug. 21-24, 2013, University of Hyogo, Japan.
Takayuki Hasegawa, Hideo Takeuchi, Hisashi Yamada, Masahiko Hata, and Masaaki Nakayama
"Effects of nonequilibrium carrier transport on optical responses in undoped GaAs/n-type GaAs epitaxial structures"
The 18th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON), July 22-26, 2013, Matsue, Japan.
Masaaki Nakayama, Takayuki Hasegawa, and Tomoya Yamashita
"Photoluminescence dynamics of excitons at the mini-Brillouin-zoneedge in a GaAs/AlAs superlattice"
The 17th International Conference on Molecular Beam Epitaxy(MBE2012), Sep 23-28, 2012, Nara, Japan.
Ryo Kishimoto and Takayuki Hasegawa
(Poster Award) "Studies on optical properties of semiconductor microcavities by polarization modulation technique"
The 2nd Short-term Student Exchange Program, Aug. 23-26, 2012, Dong-A University, Korea.
Takayuki Hasegawa, Yoshihiro Takagi, and Masaaki Nakayama,
"Modulation of excitonic quantum-beat properties due to wave-function coupling in a GaAs singlequantum well embedded in a GaAs/AlAs superlattice"
The 10th International Conference on Excitonic Processes in Condensed Matter (EXCON), July 2-6, 2012, Groningen, Netherlands.
Takayuki Hasegawa, Yoshihiro Takagi, and Masaaki Nakayama,
"Resonant coupling effects on quantum beats in a GaAs single quantum well buried in a GaAs/AlAs superlattice"
The 15th international conference on Modulated Semiconductor Structures (MSS 15), July 25-29, 2011, Tallahassee, Florida.
Takayuki Hasegawa, Yoshihiro Takagi, Hideo Takeuchi, and Masaaki Nakayama,
"Intense emission of terahertz electromagnetic wave originating from a surface surge current in an undoped GaAs/n-type GaAs epitaxial layer structure"
20th Anniversary Joint-Symposium of School of Science, University of Hyogo, International Symposium on Bioimaging and Surface Sciences, 26-27 of February 2011.
Takayuki Hasegawa, Satoshi Okamoto, and Masaaki Nakayama
"Upconversion of photoluminescence due to subband resonances in a GaAs/AlAs multiple quantum well structure"
the 14th InternationalConference on Modulated Semiconductor Structures (MSS14), July 19-24, 2009, in Kobe, Japan.