Spaser Based on Graphene Tube

Abstract

In this paper, we propose a structure for graphene spaser (Surface Plasmon Amplification by Stimulated Emission of Radiation) and develop an electrostatic model for quantizing plasmonic modes. Using this model, one can analyze any spaser consisting of graphene in the electrostatic regime. The proposed structure is investigated analytically and the spasing condition is derived. We show that spasing can occur in some frequencies where the Quality factor of plasmonic modes is higher than some special minimum value. Finally, an algorithmic design procedure is proposed by which one can design the structure for a given frequency. As an example, a spaser with plasmon energy of 0.1 eV is designed.

Terahertz lasing conditions of radiative and nonradiative propagating plasmon modes in graphene-coated cylinders

“…Terahertz graphene-based spasers with cylindrical geometries, the kind of structure considered in this paper, were studied in [27] and [28]. Wheras in [27] the inner active medium consists of an axially-located single quantum wire and the analysis is limited to the electrostatic regime exclusively, here we consider that the active medium occupies the entire interior and we use a fully retarded rigorous electromagnetic analysis.…”

“…Terahertz graphene-based spasers with cylindrical geometries, the kind of structure considered in this paper, were studied in [27] and [28]. Wheras in [27] the inner active medium consists of an axially-located single quantum wire and the analysis is limited to the electrostatic regime exclusively, here we consider that the active medium occupies the entire interior and we use a fully retarded rigorous electromagnetic analysis. Regarding [28], the analyisis is limited to the particular case of localized surface plasmon modes, that is, standing surface waves along the azimuthal direction, with no propagation along the cylinder axis (k z = 0, Fig.…”

Spaser and optical amplification conditions in graphene-coated active wires

“…In addition, in Ref. [18], the authors study, within a full quantum approach in the electrostatic regime, a spaser design consisting of a semiconducting cylindrical wire wrapped by graphene with an active inner core given by a single quantum wire. Complete literature reviews of the major developments and latest advances in spaser theory, together with a systematic exposition of some of the key results useful for understanding the operation of spasers involving both bulk as well as 2D plasmonic materials, can be found in Refs.…”

Spaser and Optical Amplification Conditions in Graphene-Coated Active Wires

“…In addition, in ref. 18 the authors study, within a full quantum approach in the electrostatic regime, a spaser design consisting of a semiconducting cylindrical wire wrapped by graphene and with an active inner core given by a single quantum wire. Complete literature reviews of the major developments and latest advances in spaser theory, together with a systematic exposition of some of the key results useful to understand the operation of spasers involving both bulk as well as two dimensional plasmonic materials, can be found in Refs.…”