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Terahertz plasmon-emitting graphene-channel transistor

Dubinov Alexander A., Aleshkin Vladimir Ya, Morozov Sergey V., Ryzhii Victor, Otsuji Taiichi

Opto-Electronics Review

2019

Vol. 27, No. 4

345--347

In this work we propose and analyze the possibility of creating terahertz plasmon-emitting graphene-channel transistor. It is shown that at electric pumping the damping of the terahertz plasmons can give way to their amplification, when the real part of the dynamic conductivity of graphene becomes negative in the terahertz range of frequencies due to the interband population inversion.

Size spectroscopy of porous glasses and porous glasses with metal nanoparticles using UV-VIS and X-ray radiation

Ovechko V., Schur O.

Optica Applicata

2005

Vol. 35, nr 4

735-743

UV-VIS and X-rays radiation were used for porous silica (PS) and porous silica with Ag nanoparticles investigations. It has been shown that XRD experiment gives information about the correlation function of heterogeneity in PS. Well-known plasmon resonance in UV spectral region was applied for the concentration and mean diameter of the metal particles determination.