Taiichi Otsuji1, Akira Satou1, Maxim Ryzhii2, Vyachaslav Popov3, Vladimir Mitin4 and Victor Ryzhii1
1 Research Institute of Electrical Communication, Tohoku University, Japan
2 Computational Nano-Electronics Laboratoty, University of Aizu, Japan
3 Kotelnikov Institute of Radio Engineering and Electronics (Saratov Branch), RAS, Russia
4 Department of Electrical Engineering, University at Buffalo, SUNY, USA
http://iopscience.iop.org/1742-6596/486/1/012007;jsessionid=590E7E5B537BB812B7FF197D7794D0D8.c2
2 Computational Nano-Electronics Laboratoty, University of Aizu, Japan
3 Kotelnikov Institute of Radio Engineering and Electronics (Saratov Branch), RAS, Russia
4 Department of Electrical Engineering, University at Buffalo, SUNY, USA
http://iopscience.iop.org/1742-6596/486/1/012007;jsessionid=590E7E5B537BB812B7FF197D7794D0D8.c2
The gapless, linear energy spectrum of graphene can lead to population inversion and negative dynamic conductivity in the terahertz range when graphene is optically or electrically pumped, which makes it possible to create a new type of graphene terahertz lasers. This paper reviews recent advances in scientific challenges to create graphene-based terahertz lasers.
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