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Microwave spectroscopy on a double quantum dot with an on-chip Josephson oscillator

Holleitner, A. W.; Qin, H.; Simmel, F.; Irmer, B.; Blick, R. H.; Kotthaus, J. P.; Ustinov, A. V.; Eberl, K.

We present measurements on microwave spectroscopy on a double quantum dot with an on-chip microwave source. The quantum dots are realized in the two-dimensional electron gas of an AlGaAs/GaAs heterostructure and are weakly coupled in series by a tunnelling barrier forming an `ionic' molecular state. We employ a Josephson oscillator formed by a long Nb/Al-AlOₓ /Nb junction as a microwave source. We find photon-assisted tunnelling sidebands induced by the Josephson oscillator, and compare the results with those obtained using an externally operated microwave source.

Zugehörige Institution(en) am KIT Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Jahr 2000
Sprache Englisch
Identifikator ISSN: 1367-2630
KITopen ID: 1000074392
Erschienen in New journal of physics
Band 2
Heft 1
Seiten 2
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