We theoretically study the high-frequency response of charge domains traveling through a strongly coupled semiconductor superlattice with an applied harmonic electromagnetic signal. Our calculations show that the superlattice alone can amplify signals with a frequency close to the domain transient frequency. Moreover, we show that if the superlattice is connected to a resonator, amplification becomes possible for much higher frequencies of the external signal (several hundred GHz). These promising results open the way to using semiconductor superlattices as efficient sub-THz amplifiers.
Funding
Russian Scientific Foundation supported study of the semiconductor superlattice coupled to resonator (Grant No. 14-12-00222). M.T.G. acknowledges financial support from the Leverhulme Trust (UK).
History
School
Science
Department
Physics
Published in
APPLIED PHYSICS LETTERS
Volume
106
Issue
4
Pages
? - ? (4)
Citation
MAKAROV, V.V. ... et al, 2015. Sub-terahertz amplification in a semiconductor superlattice with moving charge domains. Applied Physics Letters, 106 (4), 043503.
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