Large microwave response of one-dimensional Josephson junction arrays in charge dominant regime
1 Department of Physics, National Chung Hsing University - Taichung, 402, Taiwan
2 Institute of Physics, Academia Sinica - Taipei, 115, Taiwan
Received: 6 August 2014
Accepted: 25 November 2014
By using photoresistance measurement, one-dimensional (1D) Josephson junction arrays can be used as primary radio-frequency and microwave detectors. The response can be explained by the microwave-enhanced phase diffusion both in the superconducting phase and charge dominant limits. Free from the screening effect due to mobile charges when the junctions were strongly coupled via the Josephson effect, the 1D array exhibited large microwave response in the charge dominant limit. Used as an in-line detector of guided microwaves, the array produces a negligible change of about in the microwave transmission.
PACS: 74.40.Kb – Quantum critical phenomena / 74.81.Fa – Josephson junction arrays and wire networks / 72.30.+q – High-frequency effects; plasma effects
© EPLA, 2014