Scheuerer, Roland and Pavelev, D. G. and Renk, Karl F. and Schomburg, E. (2004) Frequency multiplication using induced dipole domains in a semiconductor superlattice. PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES, 22 (4). pp. 797-803. ISSN 1386-9477,
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We theoretically studied the possibility of frequency multiplication using propagating dipole domains which are induced in a semiconductor superlattice by microwave radiation. We have investigated the dynamics of electrons in a superlattice submitted to both a static voltage and a microwave field by performing a simulation based on a drift-diffusion model and incorporating current-limiting boundary conditions. The motion of electrons in the superlattice was governed by an Esaki-Tsu drift velocity field characteristic with a negative differential mobility above a critical electrical field. The simulation delivered, for a static voltage larger than a critical voltage, the periodic formation and annihilation of propagating dipole domains and, as a consequence, a reduction of the direct current through the superlattice. Our simulation showed that an additional microwave field can periodically induce and subsequently quench domains giving rise to a strongly anharmonic current. The anharmonicity of the current is the origin for the generation of higher harmonics of the microwave field. Both the formation and annihilation of a domain can take place within a time of about 1 ps suggesting that the mechanism of domain induction and quenching can be used for generation of radiation up to almost 1 THz. (C) 2003 Elsevier B.V. All rights reserved.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | MINIBAND; INSTABILITY; ELECTRONS; DIFFUSION; charge carrier waves; frequency conversion; semiconductor superlattices |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Alumni or Retired Professors > Group Karl F. Renk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 21 Jul 2021 06:04 |
| Last Modified: | 21 Jul 2021 06:04 |
| URI: | https://pred.uni-regensburg.de/id/eprint/37720 |
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