Terahertz science and technology of carbon nanomaterials

Abstract

Abstract. The diverse applications of terahertz radiation and its importance to fundamental science makes finding ways to generate, manipulate, and detect terahertz radiation one of the key areas of modern applied physics. One approach is to utilize carbon nanomaterials, in particular, single-wall carbon nanotubes and graphene. Their novel optical and electronic properties offer much promise to the field of terahertz science and technology. This article describes the past, current, and future of the terahertz science and technology of carbon nanotubes and graphene. We will review fundamental studies such as terahertz dynamic conductivity, terahertz nonlinearities, and ultrafast carrier dynamics as well as terahertz applications such as terahertz sources, detectors, modulators, antennas, and polarizers.

Vibrations of an elastic cylindrical shell near the lowest cut-off frequency

“…In particular, it might be expected that all possible shortened forms of the classical 2D dynamic equations have been already derived [6]. However, recent achievements in nanotechnology [7][8][9][10][11] inspire revisiting of this problem. In contrast to macroscopic shells used in aerospace, mechanical and civil engineering, carbon nanotubes may have a large aspect ratio characterizing the relationship between the length and radius.…”

Tunable Terahertz Hybrid Metal–Graphene Plasmons

“…The resonant frequency of such a structure depends on both the size and the surface charge density, and can be electrically tuned throughout the terahertz range by applying a gate voltage [3,4]. The promise of tunable graphene THz plasmonics has yet to be fulfilled, however, because most proposed optoelectronic devices including detectors, filters, and modulators [5][6][7][8][9][10] desire near total modulation of the absorption or transmission, and require electrical contacts to the graphene -constraints that are difficult to meet using existing plasmonic structures. We report here a new class of plasmon resonance that occurs in a hybrid graphene-metal structure.…”

Pair states in one-dimensional Dirac systems

“…Since our primary interest is the study of optoelectronic applications of carbon nanotubes [19] we will restrict ourselves to calculations concerning electron-hole pairs. However, the approach used here can be easily generalized for the study of same-charge particle pairs [34,35].…”