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Researcher Information

last modified:2024/03/25

Assistant Professor SOGA Yukihiro


Faculty, Affiliation

Faculty of Mathematics and Physics, Institute of Science and Engineering

College and School Educational Field

Division of Mathematical and Physical Science, Graduate School of Natural Science and Technology
Course in Physics, School of Mathematics and Physics, College of Science and Engineering


Academic Background


Year & Month of Birth

Academic Society



Plasma Physics

Speciality Keywords

Non-neutral plasma, THz wave, BWO, Electron beam

Research Themes

Experimental investigation of the backward wave oscillator with terahertz range in terms of plasma science

Through this research, I seek to achieve higher frequency and higher power output of terahertz light source using non-neutral plasma that is made only of electrons that are highly controllable and measurable. I approach this goal by demonstrating various processes of multiparticle system relaxation phenomena in an amplified fashion and experimentally investigating the basic characteristics of the physical phenomenon that is shown by electron beams emitting terahertz-range electromagnetic waves in electronic valves.



  •  Propagation of Intense Electron Beams Through a Rectangular Tube IEEE Transactions on Plasma Science 2020/10
  •  A Single-Shot Method for Measuring the Energy Spectra of Pure Electron Plasmas Driven by E x B Rotation Plasma and Fusion Research 2019/02
  •  Dynamics of two discrete vortices with different circulations composed of pure electron plasmas Yukihiro Soga, Yasuhiro Mihara, and Youngsoo Park AIP Conf. Proc. 1668 030002 2015/06
  •  Mechanisms of E × B Drift Rotation of a Vortex String in a Pure Electron Plasma Y. Soga, T. Mimura, Y. Kato and Y. Park Plasma Fusion Res. 8 2401034 2013/04
  •  Parallel Energy Analysis of a Pure Electron Plasma with a Drifting Maxwellian Distribution Yukihiro Soga, Youngsoo Park, Masayuki Sato, Nozomi Suzutani, and Takashi Kikuchi Journal of the Physical Society of Japan 2023/09/11

Conference Presentations

  • A Ka-band Backward-Wave Oscillator with Grating Slow-Wave Structure Developed by a Simplified Approach(conference:IRMMW-THz2019)(2019/09/01)


Arts and Fieldwork


Theme to the desired joint research

○Simulation of high-frequency electromagnetic waves
○Development of high-luminosity thermal electron gun

Grant-in-Aid for Scientific Research


Competitive research funding,Contribution

Collaborative research,Consignment study

Classes (Bachelors)

○Experiments in Fundamental Physics(2017)
○Community learning "Super" Experience Program(2017)
○Presentation and Debate (Freshman Seminar II)(2017)
○Freshman Seminar I(2017)
○Presentation and Debate (Freshman Seminar II)(2017)
○Exercise in Thermodynamics Statistical Mechanics 2(2017)
○Physics Experiments 2(2017)
○Physics Experiments 1(2017)
○Introduction to Region-studies(2016)
○Freshman Seminar I(2016)
○Presentation and Debate (Freshman Seminar II)(2016)
○Physics Experiments 2(2016)
○Exercise in Thermodynamics Statistical Mechanics 2(2016)
○Physics Experiments 1(2016)
○Experiments in Fundamental Physics(2016)

Classes (Graduate Schools)

○Physics of Oscillations and Waves b(2017)
○Research Work B(2017)
○Physics of Oscillations and Waves a(2017)
○Seminar B(2017)
○Exercise B(2017)
○Plasma Physics b(2017)
○Plasma Physics a(2017)
○Plasma Physics b(2016)
○Research Work B(2016)
○Physics of Oscillations and Waves b(2016)
○Seminar B(2016)
○Physics of Oscillations and Waves a(2016)
○Exercise B(2016)
○Plasma Physics a(2016)

International Project

International Students

Lecture themes

Others (Social Activities)

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