57 citations · 122 across the 4 of their papers we have counts for
4 papers
Observation of the Dissipative Parametric Gain in a GaAs/AlGaAs Superlattice
Vladislovas Čižas, Liudvikas Subačius, Natalia V. Alexeeva +5
Parametric generation of oscillations and waves is a paradigm, which is known to be realized in various physical systems. Unique properties of quantum superlattices allow to invest…
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…
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…
Suppressed absolute negative conductance and generation of high-frequency radiation in semiconductor superlattices
Kirill N. Alekseev, Maxim V. Gorkunov, Natalia V. Demarina +3
We show that space-charge instabilities (electric field domains) in semiconductor superlattices are the attribute of absolute negative conductance induced by small constant and lar…