Self-induced shapiro effect in semiconductor superlattices

Self-induced shapiro effect in semiconductor superlattices

We observe that the oscillatory motion of photoinjected electron-hole pairs in a biased semiconductor superlattice (Bloch oscillation) is accompanied by a coherent quasi-dc current that is generated by the interaction of the carriers with the self-induced oscillating field. It is shown that this nov...

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Veröffentlicht in:Physical review letters 2000-11, Vol.85 (22), p.4763-4766
Hauptverfasser: Loser, F, Dignam, MM, Kosevich, YA, Kohler, K, Leo, K
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container_issue 22
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container_title Physical review letters
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creator Loser, F
Dignam, MM
Kosevich, YA
Kohler, K
Leo, K
description We observe that the oscillatory motion of photoinjected electron-hole pairs in a biased semiconductor superlattice (Bloch oscillation) is accompanied by a coherent quasi-dc current that is generated by the interaction of the carriers with the self-induced oscillating field. It is shown that this novel macroscopic quantum effect, which is a coherent analog of the Shapiro effect observed in Josephson junctions, can be controlled by changing the spectral position of the exciting laser pulse, which in turn determines the amplitude and phase of the wave packet oscillations. It is thereby possible to coherently drive the electrons either downwards or upwards in the potential of the static field.
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title Self-induced shapiro effect in semiconductor superlattices
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