Giant nonlinearity in a superconducting sub-terahertz metamaterial

• 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
• Institution: Nanyang Technological University

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...