Ultrastrong coupling of intersubband plasmons and terahertz metamaterials

被引:31
作者
Dietze, D. [1 ,2 ]
Andrews, A. M. [2 ,3 ]
Klang, P. [2 ,3 ]
Strasser, G. [2 ,3 ]
Unterrainer, K. [1 ,2 ]
Darmo, J. [1 ,2 ]
机构
[1] Vienna Univ Technol, Photon Inst, A-1040 Vienna, Austria
[2] Vienna Univ Technol, Ctr Micro & Nanostruct, A-1040 Vienna, Austria
[3] Vienna Univ Technol, Inst Solid State Elect, A-1040 Vienna, Austria
基金
奥地利科学基金会;
关键词
D O I
10.1063/1.4830092
中图分类号
O59 [应用物理学];
学科分类号
摘要
We report on the ultrastrong-coupling between localized plasmons of a planar terahertz metamaterial and intersubband plasmons in a modulation doped quantum well sample. Such a system exhibits the formation of a lower and an upper polariton branch when the metamaterial eigenfrequency is tuned close to resonance with the intersubband transition. We achieve a normalized polariton splitting of 22% and a polaritonic gap of 2.4% of the intersubband transition frequency. In addition to the usual geometrical scaling, we demonstrate the effective tuning of the metamaterial resonance by dry etching with a tuning range of more than 1 THz. (C) 2013 AIP Publishing LLC.
引用
收藏
页数:5
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