The FRIS Hub Meeting is a research seminar where all FRIS researchers participate. It is held once a month, on the fourth Friday of each month (except August). The purpose of the Hub Meeting is for presenters to introduce their research to researchers from all fields, including a clear overview and accessible explanation of specialized topics, in order to foster new research ideas and collaborations. Since January 2021, the meeting has been jointly held with the TI-FRIS Hub Meeting, part of the “Tohoku Initiative for Fostering Global Researchers for Interdisciplinary Sciences (TI-FRIS).”
Presentations in English are strongly encouraged. As participants come from different research fields, shared assumptions cannot be expected. Therefore, active questions and discussions during the presentations are encouraged to deepen understanding.
We warmly invite all eligible participants (see below) to join the meeting.
*TI-FRIS is a consortium program involving Hirosaki University, Iwate University, Tohoku University, Akita University, Yamagata University, Fukushima University, and Miyagi University of Education.

The 75th FRIS Hub Meeting (Jointly held with the TI-FRIS Hub Meeting)
Date & Time: Friday, April 24, 2026, from 16:00
*Please note that the usual day has been changed for this session.
Format: Hybrid (Online via Zoom / FRIS Seminar Room)
Language: English

■Eligibility
Graduate Program in Interdisciplinary Science (GPIS), Tohoku University
Faculty members, staff, and students of Tohoku University, and others

■Registration
Advance registration is required.
Please register via the application form on the following website:
https://www.fris.tohoku.ac.jp/feature/study_group_info/detail---id-1718.html
Registration deadline: Thursday, April 23, 2026, 15:00

■Presenter
Assistant Professor TANG Chao
(FRIS, Tohoku University / Device Technology)

■Presentation Title
Closing the THz Gap with Layered Crystals

■Abstract
The terahertz (THz) frequency range remains challenging for practical devices due to the limited performance of conventional electronic and photonic technologies. This presentation focuses on device-oriented approaches to closing the THz gap using layered crystals and van der Waals heterostructures. THz detectors utilizing plasmonic rectification and interfacial transport phenomena in low-dimensional materials are introduced. By engineering device geometry, gate asymmetry, and heterostructure interfaces, enhanced responsivity and low-power operation at room temperature are achieved. These results demonstrate the potential of layered-crystal-based devices as a platform for next-generation THz sensing and communication technologies.