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Theory of parametric amplification due to Bragg reflections | Timo Hyart
; Alexey V. Shorokhov
; Kirill N. Alekseev
; | Date: |
18 Dec 2006 | Subject: | Mesoscopic Systems and Quantum Hall Effect; Statistical Mechanics | Abstract: | We consider a high-frequency response of electrons in a single miniband of superlattice subject to dc and ac electric fields. We show that Bragg reflections in miniband result in a parametric resonance which is detectable using ac probe field. We establish theoretical feasibility of phase-sensitive THz amplification at the resonance. The parametric amplification does not require operation in conditions of negative differential conductance. This prevents a formation of destructive high-field domains inside the superlattice. | Source: | arXiv, cond-mat/0612461 | Services: | Forum | Review | PDF | Favorites |
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