The 2017 terahertz science and technology roadmap

Dhillon, S and Vitiello, M S and Linfield, E H and Davies, A. G. and Hoffman, Matthias C and Booske, John and Paoloni, Claudio and Gensch, M and Weightman, Peter and Williams, G P and Castro-Camus, E and Cumming, DRS and Simeons, F and Escorcia-Carranza, I and Grant, J and Lucyszyn, S and Kuwata-Gonokami, Makoto and Konishi, Kuniaki and Koch, Martin and Schmuttenmaer, Charles A and Cocker, Tyler L and Huber, Rupert and Markelz, A G and Taylor, Z D and Wallace, Vincent P and Zeitler, J Axel and Sibik, Juraj and Korter, Timothy M and Ellison, B and Rea, S and Goldsmith, P and Cooper, Ken B and Appleby, Roger and Pardo, D and Huggard, Peter G and Krozer, Viktor and Shams, Haymen and Fice, Martyn and Renaud, Cyril and Seeds, Alwyn and Stohr, Andreas and Naftaly, Mira and Ridler, Nick and Clarke, Roland and Cunningham, John E and Johnston, Michael B (2017) The 2017 terahertz science and technology roadmap. Journal of Physics D: Applied Physics, 50 (4). ISSN 0022-3727

Abstract

Science and technologies based on terahertz frequency electromagnetic radiation (100 GHz–30 THz) have developed rapidly over the last 30 years. For most of the 20th Century, terahertz radiation, then referred to as sub-millimeter wave or far-infrared radiation, was mainly utilized by astronomers and some spectroscopists. Following the development of laser based terahertz time-domain spectroscopy in the 1980s and 1990s the field of THz science and technology expanded rapidly, to the extent that it now touches many areas from fundamental science to ‘real world’ applications. For example THz radiation is being used to optimize materials for new solar cells, and may also be a key technology for the next generation of airport security scanners. While the field was emerging it was possible to keep track of all new developments, however now the field has grown so much that it is increasingly difficult to follow the diverse range of new discoveries and applications that are appearing. At this point in time, when the field of THz science and technology is moving from an emerging to a more established and interdisciplinary field, it is apt to present a roadmap to help identify the breadth and future directions of the field. The aim of this roadmap is to present a snapshot of the present state of THz science and technology in 2017, and provide an opinion on the challenges and opportunities that the future holds. To be able to achieve this aim, we have invited a group of international experts to write 18 sections that cover most of the key areas of THz science and technology. We hope that The 2017 Roadmap on THz science and technology will prove to be a useful resource by providing a wide ranging introduction to the capabilities of THz radiation for those outside or just entering the field as well as providing perspective and breadth for those who are well established. We also feel that this review should serve as a useful guide for government and funding agencies.