Nonlinear Coupling in Nb/NbN Superconducting Microwave Resonators

In this experimental study we show that the coupling between Nb/NbN superconducting microwave resonators and their feedline can be made amplitude dependent. We employ this mechanism to tune the resonators into critical coupling condition, a preferable mode of operation for a wide range of applicatio...

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Bibliographic Details
Main Authors Abdo, Baleegh, Segev, Eran, Shtempluck, Oleg, Buks, Eyal
Format Journal Article
LanguageEnglish
Published 11.01.2005
Subjects
Physics - Superconductivity
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Summary:In this experimental study we show that the coupling between Nb/NbN superconducting microwave resonators and their feedline can be made amplitude dependent. We employ this mechanism to tune the resonators into critical coupling condition, a preferable mode of operation for a wide range of applications. Moreover we examine the dependence of critical coupling state on other parameters such as temperature and magnetic field. Possible novel applications based on such nonlinear coupling are briefly discussed.
DOI:10.48550/arxiv.cond-mat/0501236