High-speed Schottky photodiode on semi-insulating GaAs

Field effect on positron diffusion in semi-insulating GaAs.

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...

Single Crystal Diamond Schottky Photodiode

Thanks to its extreme optical and electronic properties, diamond appears to be a promising semiconducting material for photon detection. Its wide band-gap, 5.5 eV, results in a very low leakage current and its electronic properties as high carrier mobility allow fast time response (J. E. Field, 1979). Besides, it has a large breakdown electric field (∼10 V/┤m), a low dielectric constant (i.e. l...

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 ...

Verification of EL2 electronic absorption effect on charge transfer in semi-insulating GaAs.

The electronic absorption of EL2 centers has been clarified to be related to the electron and hole photoionizations, and the transition from its ground state to metastable state, respectively. Under an illumination with a selected photon energy in the near infrared region, these three processes with different optical cross sections will show different kinetics against the illumination time. It ...