Giant nonlinearity in a superconducting sub-terahertz metamaterial

Giant nonlinearity in a superconducting sub-terahertz metamaterial

We report a superconducting sub-THz metamaterial operating in a CW-regime, which exhibits a record-breaking resonant third-order nonlinearity with effective n2∼10 cm2/W. The nonlinear response is caused by the radiation-induced resistive heating, suppressing the superconductivity in the nano-scale c...

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Bibliographic Details
Main Authors: Savinov, V., Delfanazari, K., Fedotov, V. A., Zheludev, Nikolay I.
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2016
Subjects:
Metamaterials
Niobium
Online Access:https://hdl.handle.net/10356/81500
http://hdl.handle.net/10220/40853
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Institution: Nanyang Technological University
Language: English
Description
Summary:We report a superconducting sub-THz metamaterial operating in a CW-regime, which exhibits a record-breaking resonant third-order nonlinearity with effective n2∼10 cm2/W. The nonlinear response is caused by the radiation-induced resistive heating, suppressing the superconductivity in the nano-scale constrictions of the structure's meta-molecules. The nonlinearity has a relaxation time of 25 μs and leads to a substantial change of the amplitude and phase of the transmitted radiation at intensities of only 500 μW/cm.

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