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25 April 2024

» arxiv » cond-mat/0601056

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Suppressed absolute negative conductance and generation of high-frequency radiation in semiconductor superlattices
Kirill N. Alekseev ; Maxim V. Gorkunov ; Natalia V. Demarina ; Timo Hyart ; Natalia V. Alexeeva ; Aleksey V. Shorokhov ;
Date:	3 Jan 2006
Subject:	Mesoscopic Systems and Quantum Hall Effect; Statistical Mechanics
Abstract:	We show that space-charge instabilities (electric field domains) in semiconductor superlattices are the attribute of absolute negative conductance induced by small constant and large alternating electric fields. We propose the efficient method for suppression of this destructive phenomenon in order to obtain a generation at microwave and THz frequencies in devices operating at room temperature. We theoretically proved that an unbiased superlattice with a moderate doping subjected to a microwave pump field provides a strong gain at third, seventh, etc. harmonics of the pump frequency in the conditions of suppressed domains.
Source:	arXiv, cond-mat/0601056
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