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

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).