Electrical Domains and Sub-millimeter Signal Generation in AlGaN/GaN Superlattices


The paper discusses the feasibility of a submillimeter-signal source made of AlGaN/GaN superlattice. Negative differential conductivity, electrical domain formation, current oscillations, and power efficiency of a perspective source are described. We relate the superlattice geometry and conduction band profile, distorted by polarization fields, to the oscillation frequency and power efficiency of the device. We also determine the optimal Al content, superlattice period, and the parameters of external circuit that favor sub-millimeter wave generation.

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Authors thank P. H. Siegel, F. Maiwald, and E. Schlecht for valuable discussion.

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Correspondence to Irina Gordion.

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Gordion, I., Manasson, A. & Litvinov, V.I. Electrical Domains and Sub-millimeter Signal Generation in AlGaN/GaN Superlattices. MRS Online Proceedings Library 892, 1307 (2005). https://doi.org/10.1557/PROC-0892-FF13-07

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