A novel GaAs structure for terahertz generators driven by plasma instability

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Abstract
An GaAs structure is proposed for microwave power generation in the terahertz frequency region. The structure allows one both to realize within a mean free path distance a quasi-ballistic beam of hot electrons moving through a cold plasma and to use intervalley transfer to upper valleys as a strong mechanism for beam modulation. Kinetic energy is thus transferred from hot electrons to coherent plasma oscillations. The main features of such a generator are investigated by the Monte Carlo particle simulation.