THz Radiation Source through Periodically Modulated Structures.
Interim rept. no. 3, May-Aug 96,
VIENNA UNIV (AUSTRIA) INST FUER FESTKOERPERPHYSIK
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Further progress has been achieved in the understanding of carrier injection into superlattices. We were able to calculate the current in a two terminal and three terminal device. In the two terminal device a strong temperature dependence of the injected current is found which depends mainly on the Fermi level in the emitter. With increasing temperature a high current level is possible. The calculated current values for the three terminal device do also agree quite well with the experimental values. This is a very encouraging result. The systematic studies of quantum wires have been continued. A clear dependence of wire mobility and subband spacing on etching procedure has been found. In the next periods new schemes as f.e. side gate techniques will be pursued to improve the wire quality and the subband spacings.
- Electricity and Magnetism