Spectrum dynamics of negative-effective-mass oscillators under terahertz radiation

Abstract

Articles you may be interested inOn the modeling and nonlinear dynamics of autonomous Silva-Young type chaotic oscillators with flat power spectrum Chaos 24, 043134 (2014); 10.1063/1.4903313 Phenomenological theory of tunnel emitter transit time oscillators for the terahertz rangeWe report on a theoretical investigation of power spectrum dynamics in negative-effective-mass ͑NEM͒ p ϩ pp ϩ oscillators under the influence of terahertz ͑THz͒ electromagnetic radiation. Possible types of transport states ͑periodic or chaotic͒ and transitions between them are examined with the intensity and frequency of the radiation as controlling parameters. When the driving frequency is fixed to the self-oscillating frequency times the inverse Golden ratio, the resulting power spectrum pattern displays a very complex mosaic scenario with a self-similar emergence of high-order mixing frequencies.

Transport properties of a bilayer two-dimensional electron gas under an in-plane magnetic field: Monte Carlo simulations

“…In p-doped GaAs/ ͑Al, Ga͒As quantum wells, it has been predicted theoretically that because of the existence of NEM section on the in-plane energy dispersion curve, dv d / dE Ͻ 0 region appears on the in-plane v d -E curve of the 2D hole gas. 28,29 However, despite the large magnetic-field-induced NEM section on the energy dispersion in k x direction of the bilayer 2DEG, there are no such dv d / dE Ͻ 0 regions for any in-plane magnetic field. The above results indicate that the existence of NEM section on the energy dispersion relation is not a sufficient condition for the appearance of the dv d / dE Ͻ 0 region on v d -E curves.…”

A novel terahertz wave reflective polarizer for THz communication

“…The terahertz technology is a rapidly growing research issue in recent years and shows great potential applications in many scientific and technological fields, such as medical diagnosis, security screening, radio astronomy, atmospheric studies, short-range in-door communication, chemical, biological sensing, medical and biological imaging, and detection of explosives [1][2][3][4][5]. With the rapid development of terahertz radiation sources [6][7][8] and detectors [9,10], there is also a great demand for terahertz filters, polarizers, and attenuators [11][12][13]. However, quantitative studies on terahertz wave polarizer are still very limited.…”