Model of the Influence of an External Magnetic Field on the Gain of Terahertz Radiation from Semiconductor Superlattices

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.

4 pages, replaced with final version

References in corpus (3)

• Terahertz Bloch oscillator with a modulated bias
• Bloch gain in dc-ac-driven semiconductor superlattices in the absence of electric domains
• Theory of parametric amplification in in superlattices

Cited by in corpus (6)

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• Superlattice nonlinearities for Gigahertz-Terahertz generation in harmonic multipliers
• Synchronizing Bloch-oscillating free carriers in moiré flat bands
• Nanohelices as superlattices: Bloch oscillations and electric dipole transitions
• Physical Principles of the Amplification of Electromagnetic Radiation Due to Negative Electron Masses in a Semiconductor Superlattice
• Beyond the ordinary acoustoelectric effect: superluminal phenomena in the acoustic realm and phonon-mediated Bloch gain