K. F. Renk, A. Meier, B. I. Stahl, A. Glukhovskoy, M. Jain, H. Appel, W. Wegscheider
Published 2005-02-11Version 1
We report the operation of a Bloch oscillator. The active medium was a staticvoltage driven, doped GaAs/AlAs superlattice which was electromagnetically coupled to a resonator. The oscillator produced tuneable microwave radiation (frequency ~ 60 GHz; power ~ 0.5 mW; efficiency ~ 4 %). The gain (~ 10^4 /cm) was due to the nonlinearity mediated by miniband electrons. We also present a theory of the oscillator. The Bloch oscillator should in principle be feasible for generation of radiation up to frequencies of 10 THz and more.
Comments: 9 pages, 4 figures
Related articles:
Intersubband gain in a Bloch oscillator and Quantum cascade laser
Superlattice with hot electron injection: an approach to a Bloch oscillator
