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Terahertz Bloch oscillator with a modulated bias | Timo Hyart
; Natalia V. Alexeeva
; Jussi Mattas
; Kirill N. Alekseev
; | Date: |
21 Dec 2008 | Abstract: | Electrons performing Bloch oscillations in an energy band of a dc-biased
superlattice in the presence of weak dissipation can potentially generate THz
fields at room temperature. The realization of such Bloch oscillator is a
long-standing problem due to the instability of a homogeneous electric field in
conditions of negative differential conductivity. We establish the theoretical
feasibility of stable THz gain in a long superlattice device in which the bias
is quasistatically modulated by microwave fields. The modulation waveforms must
have at least two harmonics in their spectra. | Source: | arXiv, 0812.4046 | Services: | Forum | Review | PDF | Favorites |
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