Fig. 3: Exemplary resonator response and power-dependence of the internal quality factor. | Communications Physics

Fig. 3: Exemplary resonator response and power-dependence of the internal quality factor.

From: Microwave spectroscopy of Andreev states in InAs nanowire-based hybrid junctions using a flip-chip layout

Fig. 3

a Single-tone response of a strongly overcoupled resonator similar to the microwave circuit shown in a with a sample chip attached to it and with the nanowire Josephson junction set into pinch-off. The blue line corresponds to the measured change in magnitude and the red line to the unwrapped phase, respectively. The latter has been corrected by the frequency-dependent background phase Θb(f). b Extracted internal quality factor of the very same resonator as a function of the applied microwave power. Measurements are performed at T ~ 15 mK and the rf-power is indicated with the fridge-internal attenuation accounted for. The inset shows an exemplary circle fit of the resonator in the IQ plane at an applied microwave power of −80 dBm.

Back to article page