Low frequency oscillations and bifurcation diagram in semi-insulating GaAs samples

Low Frequency Oscillations and Bifurcation Diagram in Semi-Insulating GaAs Samples

R. L. da Silva 1, H. A. Albuquerque 1, R. M. Rubinger 2, A. G. de Oliveira 1, G. M. Ribeiro 1, and W. N. Rodrigues 1 1Departamento de Fı́sica, Instituto de Ciências Exatas, Universidade Federal de Minas Gerais, Caixa Postal 702, 30123-970, Belo Horizonte, MG, Brazil 2Departamento de Fı́sica e Quı́mica, Instituto de Ciências, Universidade Federal de Itajubá, Caixa Postal 50, 37500-903, Itajubá, MG,...

Emission characteristics of photoconductive antennas based on low-temperature-grown GaAs and semi-insulating GaAs.

Terahertz radiation was generated with several designs of photoconductive antennas (three dipoles, a bow tie, and a coplanar strip line) fabricated on low-temperature-grown (LT) GaAs and semi-insulating (SI) GaAs, and the emission properties of the photoconductive antennas were compared with each other. The radiation spectrum of each antenna was characterized with the photoconductive sampling t...

Scanning tunneling microscopy and spectroscopy of semi-insulating GaAs

N. D. Jäger, Ph. Ebert, K. Urban, R. Krause-Rehberg, and E. R. Weber Institut für Festkörperforschung, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany Fachbereich Physik, Martin-Luther-Universität Halle, 06099 Halle, Germany Department of Materials Science, University of California, and Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 ~Received ...

Field effect on positron diffusion in semi-insulating GaAs.

Low Frequency Oscillations Suppression via CPSO based Damping Controller

In this paper, the Unified Power Flow Controller (UPFC) is enhanced with a Chaotic Particle Swarm Optimization (CPSO) Damping Controller in order to mitigate the Low Frequency Oscillations (LFO) in a Single Machine Infinite Bus (SMIB) power system. The designed damping controller is an optimized lead-lag controller, which extracts the speed deviation of the generator rotor and generates the out...