6 O ct 1 99 9 Microwave spectroscopy on a double quantum dot with a near - field Josephson oscillator
نویسندگان
چکیده
We present measurements on microwave spectroscopy on a double quantum dot with a near-field 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 tunneling barrier forming an 'ionic' molecular state. As a microwave source we employ a Josephson oscillator formed by a long Nb/Al-AlO x /Nb junction. We find photon assisted tunneling sidebands induced by the Josephson oscillator and compare the results with those using an externally operated microwave source.
منابع مشابه
Microwave spectroscopy on a double quantum dot with an on-chip Josephson oscillator
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 tunneling barrier forming an ’ionic’ molecular state. As a microwave source we employ a Josephson oscillator formed by a long Nb/Al-AlOx/Nb junction. W...
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