High Tc Superconducting THz Metamaterial for Ultrastrong Coupling in a Magnetic Field

被引：24

作者：

Keller, Janine ^{[1
]}

Scalari, Giacomo ^{[1
]}

Appugliese, Felice ^{[1
]}

Mavrona, Elena ^{[1
]}

Rajabali, Shima ^{[1
]}

Suess, Martin J. ^{[1
]}

Beck, Mattias ^{[1
]}

Faist, Jerome ^{[1
]}

机构：

[1] Swiss Fed Inst Technol, Inst Quantum Elect, Auguste Piccard Hof 1, CH-8093 Zurich, Switzerland

来源：

ACS PHOTONICS | 2018年 / 5卷 / 10期

基金：

欧洲研究理事会; 瑞士国家科学基金会;

关键词：

high T-c; superconductor; metamaterial; terahertz; ultrastrong coupling; focused ion beam (FIB); Landau polaritons; cyclotron; LIGHT-MATTER INTERACTION; TERAHERTZ METAMATERIAL; POLARITONS; NIOBIUM; REGIME; GAP;

D O I：

10.1021/acsphotonics.8b01025

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We fabricate high temperature superconducting metasurfaCes from yttrium barium copper oxide (YBCO) films via focused ion beam milling. The design of the complementary split ring resonators yields a high quality factor (up to Q = 31) resonance, which is fully switchable when exploiting the transition from the superconducting to normal conducting state, which is achieved by heating the sample above the critical temperature. Meanwhile, the resonance is continuously visible and frequency stable under the action of a magnetic field, up to B = 9 T. This makes it an ideal candidate for light- matter coupling experiments with magnetic field tunable Landau level transitions. We present two techniques to bring the metasurface in close vicinity of a 2D electron gas in an AlGaAs/GaAs QW without direct deposition, and we achieve a normalized vacuum Rabi frequency of Omega(R)/omega(cyc) = 24%.

引用

页码：3977 / 3983

页数：13

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