JIA Lab at Waseda University, JAPAN

JIA Lab at Waseda University, JAPAN

飛んでいる鳥のイラスト。

PI: Junjun JIA

Junjun JIA is a Full Professor at Waseda University, Japan. He joined Waseda University in 2019 as an Associate Professor, and was promoted to Full Professor in 2024. Prior to the Waseda appointment, he served as an assistant professor at Aoyama Gakuin University following the completion of his PhD graduation at the university of Tokyo. Prof. JIA has authored/co-authored more than 70 papers in Advanced Functional Materials, Physical Review Applied, Physical Review B, Applied Physics Letters and so on. He also co-filed 3 EU/Japan patents in the design, fabrication, and characterization of semiconductor materials/devices. His current focus is on ultrafast semiconductor optoelectronics, and optoacoustic engineering. 

Student Recruitment

We are always looking for highly motivated students and researchers who are passionate about materials physics, semiconductor devices, optical design, and nonequilibrium electronic devices. If you are interested in joining our group, please feel free to contact: [email protected] with 1) A brief self-introduction and research interest and 2) your CV.

Research Topics:

1) Ultrafast and Nonequilibrium Solid-State Devices

Investigation of light-driven, nonequilibrium phenomena in condensed matter systems, including ultrafast carrier dynamics, photo-induced phase transitions, and quantum transport under non-steady-state conditions. Emphasis is placed on developing novel optoelectronic and quantum devices that operate beyond conventional equilibrium limits.  See: Junjun JIA et al., Multivalley optical switching in germanium | Phys. Rev. Applied 23, 024060 (2025).

2) Semiconductor Materials and Devices

 

Exploration of emerging semiconductor materials such as CuI, EuO, and VO₂ under extreme conditions under extreme external stimuli, including ultrafast photoexcitation, ultrahigh-pressure environments, and ultralow strain engineering. Focuse areas include band engineering, correlated electron effects, spin-valley interactions, and light–matter coupling in functional thin films and heterostructures, as well as their device applications in next-generation electronic and optoelectronic devices . See: Junjun JIA, et al., Applied Physics Letters, 106, 023502 (2015)

3) Thermal Logic Circuits and Thermal Management

Design and implementation of thermally responsive materials for use in thermal logic circuits and energy-efficient computing architectures. Our research focuses on materials that enable thermal switching and modulation, particularly under ultrafast or non-equilibrium conditions, with the goal of utilizing heat as an active signal carrier. See: Junjun JIA, et al., Advanced Functional Materials, 34, 2406667 (2024).

Publications:

JUNJUN JIA (0000-0002-0916-9895) – ORCID

Junjun Jia – マイポータル – researchmap

‪Junjun Jia‬ – ‪Google Scholar

Fundings from Japanese Goverments:

JSPS KAKENHI Grant–in–Aid for Scientific Research (B) (Grant No. 25K01862).

JSPS KAKENHI Grant–in–Aid for Scientific Research (B) (Grant No. 25K01296).

JSPS KAKENHI Grant–in–Aid for Scientific Research (B) (Grant No. 24K01169).

JSPS KAKENHI Grant–in–Aid for Scientific Research (C) (Grant No. 20K05368).

JSPS KAKENHI Grant–in–Aid for Scientific Research (C) (Grant No. 16K04966).

JSPS KAKENHI Grant-in-Aid for Young Scientists (B) (Grant No. 16K21338).

Student Recruitment

We welcome:

  • Master’s and Ph.D. students
  • International exchange students
  • Visiting scholars and postdoctoral researchers with strong backgrounds in materials science, physics, or electrical engineering

Skills You Can Gain

  • Hands-on experience with pump–probe spectroscopy, high-pressure devices, and ultrafast optics
  • Computational modeling (DFT, VASP, carrier dynamics)
  • Device fabrication and thin-film growth
  • Data analysis, automation, and Python-based tool development

How to Apply: feel free to contact: [email protected] with 1) A brief self-introduction and research interest and 2) your CV.