Dedicated to Prof. Wolfgang Eisenmenger on the occasion of his 65th birthday
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- Referenz
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10 M. Shur, GaAs devices and circuits, Plenum Press, New York 1989
11 K. Chang, Microwave solid-state circuits and applications, John Wiley & Sons, New York 1994
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9 G. Bastard, Wave mechanics applied to semiconductor heterostructures, les editions de physique, Les Ulis 1988
- Seitenbereich
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0184 - 0190
- Schlagwort(e)
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<KWD>Semiconductor superlattice
Bloch oscillations
Microwave oscillator
- Zusammenfsg.
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We report on a microwave oscillator based on Bloch oscillations of electrons in a semiconductor superlattice. Our GaAs/AlAs superlattice, at room temperature, was coupled electromagnetically by an antenna to a rectangular cavity resonator, and was operated at a current-voltage state of negative differential conductance. We observed generation of microwave radiation at frequencies, depending on the resonator length, between 7 and 30 GHz. Electronic tuning by several percent was possible; the ratio of linewidth to frequency was of the order of 10<sup>-4</sup>. A radiation power up to 1 μW (at 10 GHz) was obtained, corresponding to a generator efficiency of the order of 10<sup>-3</sup> for the conversion of electrical power to microwave radiation.
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