[PDF]    http://dx.doi.org/10.3952/physics.v55i4.3219

Open access article / Atviros prieigos straipsnis

Lith. J. Phys. 55, 243248 (2015)

Victor Ryzhiia,b, Taiichi Otsujib, Maxim Ryzhiia, Vladimir Mitinc, and Michael S. Shure
aResearch Institute for Electrical Communication,Tohoku University, Sendai 980-8577, Japan
E-mail: v-ryzhii@riec.tohoku.ac.jp
bInstitute of Ultra High Frequency Semiconductor Electronics of RAS and Center for Photonics and Infrared Engineering, Bauman Moscow State Technical University, Moscow 111005, Russia
cDepartment of Computer Science and Engineering, University of Aizu, Aizu-Wakamatsu 965-8580, Japan
dDepartment of Electrical Engineering, University at Buffalo, SUNY, Buffalo, New York 1460-1920, USA
eDepartments of Electrical, Electronics, and Systems Engineering and Physics, Applied Physics, and Astronomy, Rensselaer Polytechnic Institute, Troy, NY 12180, USA

Received 31 August 2015; accepted 29 September 2015

We demonstrate that the indirect interband generation of photons in the optically or injection pumped graphene bilayer (GBL) heterostructures with an array of metal particles (GBLs “decorated” by metal particles) with population inversion can surpass their intraband (Drude) absorption. This can result in rather large absolute values of the negative dynamic terahertz (THz) conductivity in a wide range of frequencies at room temperature. This effect enables the creation of novel THz lasers based on the decorated GBLs.
Keywords: graphene bilayer, population inversion, array of metal particles, terahertz radiation
PACS: 72.80.Vp, 72.30.+q, 72.10.Fk


Victor Ryzhiia,b, Taiichi Otsujib, Maxim Ryzhiia, Vladimir Mitinc, Michael S. Shure
aTohoku universitetas, Sendajus, Japonija
bMaskvos valstybinis Baumano technikos universitetas, Maskva, Rusija
cAizu universitetas, Aizu-Wakamatsu, Japonija
dBufalo universitetas, Bufalas, Niujorko valstija, JAV
eRensselaer politechnikos institutas, Troja, Niujorko valstija, JAV

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