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Model of the influence of an external magnetic field on the gain of terahertz radiation from semiconductor superlattices
journal contribution
posted on 2013-07-25, 10:24 authored by Timo Hyart, Jussi Mattas, Kirill AlekseevWe 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 cyclotron oscillations in crossed electric and magnetic fields. In contrast to Bloch gain, here the superlattice is in an electrically stable state. We also find that THz Bloch gain can be significantly enhanced with a perpendicular magnetic field. If the magnetic field is tilted with respect to the superlattice axis, the usually unstable Bloch gain profile becomes stable in the vicinity of Stark-cyclotron resonances.
History
School
- Science
Department
- Physics
Citation
HYART, T., MATTAS, J. and ALEKSEEV, K.N., 2009. Model of the influence of an external magnetic field on the gain of terahertz radiation from semiconductor superlattices. Physical Review Letters, 103 (11), 117401.Publisher
© The American Physical SocietyVersion
- VoR (Version of Record)
Publication date
2009Notes
This article was published in the journal, Physical Review Letters [© The American Physical Society]. It is also available at: http://dx.doi.org/10.1103/PhysRevLett.103.117401ISSN
0031-9007eISSN
1079-7114Publisher version
Language
- en