57 citations · 121 across the 4 of their papers we have counts for
4 papers
Model of the Influence of an External Magnetic Field on the Gain of Terahertz Radiation from Semiconductor Superlattices
Timo Hyart, Jussi Mattas, Kirill N. Alekseev
We theoretically analyze the influence of magnetic field on small-signal absorption and gain in a superlattice. We predict a very large and tunable THz gain due to nonlinear cyclot…
Terahertz Bloch oscillator with a modulated bias
Timo Hyart, Natalia V. Alexeeva, Jussi Mattas +1
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. T…
Terahertz Parametric Gain in Semiconductor Superlattices
Timo Hyart, Alexey V. Shorokhov, Kirill N. Alekseev
We consider a high-frequency response of electrons in a single miniband of superlattice subject to dc and ac electric fields. Action of ac electric field causes oscillations of ele…
THz parametric gain in semiconductor superlattices in the absence of electric domains
Timo Hyart, Natalia V. Alexeeva, Ahti Leppanen +1
We theoretically show that conditions for THz gain and conditions for formation of destructive electric domains in semiconductor superlattices are fairly different in the case of p…