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Theory of parametric amplification in superlattices | | Timo Hyart
; Alexey V Shorokhov
; Kirill N Alekseev
; | | Date: |
1 Jun 2007 | | Journal: | Phys Rev Lett, 98 (22), 220404 | | 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 domains of high electric field inside the superlattice. | | Source: | PubMed, pmid17677823 | | Services: | Forum | Review | Favorites | |
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