Challenge for Video Imaging with Terahertz Waves
Professor, Center for Japan-Egypt Cooperation in Science and Technology,
Kyushu University, Japan
Recently, there has been an increasing interest in the use of terahertz electromagnetic waves in many fields such as high-speed communication, security, and drug discovery. In addition to high resolution, terahertz waves have penetration into several materials such as plastic, ceramic, and clothing. Furthermore, the absorption spectra of most chemical substances are present in terahertz frequencies. Therefore, imaging utilizing terahertz frequencies is highly attractive in the coming IoT era.
There are some reports which have conducted terahertz imaging by mechanical scanning. A terahertz spectroscopic imaging visualized and identified chemical substances contained in a medicine tablet. However, mechanical scanning spends much time, for example, about 7 hours to obtain one picture. Developing a real time terahertz imaging device at room temperature has still been challenging due to lack of the sensitivity of detectors. In fact, R&D’s of LSI to realize it are going on in Europe, US, and Asia, and some of them are pushed forward as a national project.
We have recently developed a highly sensitive sensor which is capable of detecting 1.0 THz waves using advanced semiconductor technology. While R&D has been going on to implement an image sensor, state-of-the-art of the research results is presented and future prospects are discussed.
Tanemasa Asano received his M. Eng. and D. Eng. in electronics from Tokyo Institute of Technology in 1979 and 1985, respectively. He worked for Tokyo Institute of Technology from 1979 to 1989, Kyushu Institute of Technology from 1989 to 2006, and Kyushu University from 2006 while he served as Associate Dean of Faculty of Information Science and Electrical Engineering from 2015 to 2019. In 2019, he became a professor specially assigned for Center for Japan-Egypt Cooperation in Science and Technology. He carried out a number of academic research project funded by MEXT of Japan. Besides, he served the project leader for several national projects for industry-academia collaborative R&D’s funded by METI of Japan. He has been a member of Technology Assessment Examination Committee of NEDO for long. He authored 12 books including “Electron Devices” and “Integrated Circuits”, in which the former is a standard text book of Japanese undergraduates and Kosen. He was awarded the Lecture in Engineering Award from Kyushu University in 2017. He is a Fellow of JSAP. He served the former Chair of IEEE Fukuoka Section.