Advanced terahertz devices and systems based on silicon photonic structures and resonant tunneling diodes toward 6G and beyond
A wide untapped region exists between radio waves and light in the electromagnetic spectrum: terahertz (THz) waves. THz frequencies combine the penetration of radio waves and the large bandwidth of light, which makes them excellent candidates for next-generation information communication technology, 6G and beyond, such as ultra-broadband wireless communication, spectroscopic sensing, nondestructive imaging, and high-resolution ranging. However, THz frequencies are at the upper limit of the capabilities of conventional electronics, and the development of THz devices and systems is a challenging field of interdisciplinary research. In particular, it is difficult to generate a significant amount of power from THz sources. THz devices must, therefore, be as efficient as possible to conserve limited power. Resonant tunneling diodes, which can make the fundamental THz oscillation at room temperature, are a major candidate for both THz transmitters and receivers because of their simple and low-power consumption electronic devices. In addition, a low-loss platform for integrating THz devices is essential for various practical systems. However, the propagation loss of transmission lines based on conventional electronics is high in the THz region, mainly owing to the high ohmic loss in metals. Thus, an alternative, metal-free integrated platform based on THz silicon photonic structures is necessary to manipulate THz waves.
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- Date: 28 Apr 2022
- Time: 02:30 PM to 03:30 PM
- All times are (UTC+09:30) Adelaide
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- Co-sponsored by Morteza Shahpari
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Speakers
Prof. Masayuki Fujita
Biography:
Masayuki Fujita received the Ph.D. degree from Yokohama National University, Yokohama, Japan, where he focused on ultrasmall and ultralow-threshold microdisk lasers, in 2002. Subsequently, he joined the Department of Electronic Science and Engineering, Kyoto University, Kyoto, Japan, and initiated research on photonic crystals, including spontaneous emission control in photonic crystals and high-efficiency light extraction in light-emitting diodes and silicon light emitters. Next, he moved to Osaka University, Toyonaka, Japan, in 2011 and was appointed the Research Director of the strategic basic research program CREST, “Development of terahertz integrated technology platform through fusion of resonant tunneling diodes and photonic crystals” (2015-2021) and “Development of integrated devices and systems to control time domain and space distribution of terahertz waves,” (2021-) of the Japan Science and Technology Agency. He is currently an Associate Professor with the Graduate School of Engineering Science, Osaka University. His research interests include terahertz materials, devices, systems, and photonic nanostructures, microstructures, and their applications. He is a Member of the Japan Society of Applied Physics, the Laser Society of Japan, the Institute of Electronics, Information and Communication Engineers (IEICE), Japan, the Japanese Photochemistry Association, and Optica, formerly OSA. From 1999 to 2002 and from 2003 to 2006, he was a Research Fellow of the Japan Society for the Promotion of Science. He is currently a Vice-chair of IEICE Technical Committee on Microwave Photonics and Terahertz Photonic-Electronics Technologies, Japan.