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Title: Model of the influence of an external magnetic field on the gain of terahertz radiation from semiconductor superlattices
Authors: Hyart, Timo
Mattas, Jussi
Alekseev, K.N.
Issue Date: 2009
Publisher: © The American Physical Society
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.
Abstract: We 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.
Description: 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.103.117401
Version: Published
DOI: 10.1103/PhysRevLett.103.117401
URI: https://dspace.lboro.ac.uk/2134/12823
Publisher Link: http://dx.doi.org/10.1103/PhysRevLett.103.117401
ISSN: 0031-9007
Appears in Collections:Published Articles (Physics)

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