Giant nonlinearity in a superconducting sub-terahertz metamaterial

被引：25

作者：

Savinov, V. ^{[1
,2
]}

Delfanazari, K. ^{[1
,2
]}

Fedotov, V. A. ^{[1
,2
]}

Zheludev, N. I. ^{[1
,2
,3
]}

机构：

[1] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

[2] Univ Southampton, Ctr Photon Metamat, Southampton SO17 1BJ, Hants, England

[3] Nanyang Technol Univ, TPI, Ctr Disrupt Photon Technol, Singapore 637371, Singapore

来源：

APPLIED PHYSICS LETTERS | 2016年 / 108卷 / 10期

基金：

英国工程与自然科学研究理事会;

关键词：

FANO RESONANCES; FILMS; NBN;

D O I：

10.1063/1.4943649

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report a superconducting sub-THz metamaterial operating in a CW-regime, which exhibits a record-breaking resonant third-order nonlinearity with effective n(2) similar to 10 cm(2)/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 mu s and leads to a substantial change of the amplitude and phase of the transmitted radiation at intensities of only 500 mu W/cm(2). (C) 2016 AIP Publishing LLC.

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页数：4

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