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Title: Ultrastrong coupling of intersubband plasmons and terahertz metamaterials

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.
Authors:
; ;  [1] ; ; ;  [2]
  1. Photonics Institute and Center for Micro- and Nanostructures, Vienna University of Technology, Gusshausstr. 27-29, A-1040 Vienna (Austria)
  2. Institute for Solid State Electronics and Center for Micro- and Nanostructures, Vienna University of Technology, Floragasse 7, A-1040 Vienna (Austria)
Publication Date:
OSTI Identifier:
22254068
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 103; Journal Issue: 20; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; DOPED MATERIALS; ETCHING; MODULATION; PLASMONS; QUANTUM WELLS; RESONANCE; TUNING