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

摘要

We report on a theoretical investigation of power spectrum dynamics in negative-effective-mass (NEM) p~(+)pp~(+) oscillators under the influence of terahertz (THz) electromagnetic radiation. Possible types of transport states (periodic or chaotic) 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.