THz Radiation Source through Periodically Modulated Structures.
Interim rept. no. 2, Feb-May 96,
TECHNISCHE UNIV VIENNA (AUSTRIA) INST FUER FESTKOERPERELEKTRONIK
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For the first time the technique of Hot Electron Spectroscopy is applied to the study of superlattice transport. Direct current spectroscopy of minibands in a field free, undoped superlattice is demonstrated. Miniband transport through the first and second miniband of three superlattices with different well widths as a function of the hot electron injection energy is observed. The obtained miniband widths and positions agree very well with theoretical calculation. The structure described in this work gives the highest energy resolution reported so far for electron current spectroscopy. A transfer ration of about 25 is obtained with the chosen transistor structure, giving an optimistic outlook for injection structures.
- Electricity and Magnetism