Ultra-strong coupling effects with quantum metamaterials
Abstract
We study a semiconductor-based quantum metamaterial which has the optical characteristics of a metal in two directions, but behaves like a collection of artificial atoms, whose properties can be designed-in using quantum theory, in the third. We find that it supports a type of guided collective plasma resonance (CPR) mode which exhibits efficient optical coupling and long propagation distances. Furthermore, the coupling of the CPR mode with the 'artificial atom' transition leads to a case of "Ultra-Strong-Coupling", demonstrated by a record vacuum Rabi splitting of 65 meV, a sizable fraction (42%), of the bare intersubband energy.
- Publication:
-
Solid State Communications
- Pub Date:
- June 2008
- DOI:
- 10.1016/j.ssc.2008.03.027
- arXiv:
- arXiv:cond-mat/0701775
- Bibcode:
- 2008SSCom.146..406P
- Keywords:
-
- Condensed Matter - Other Condensed Matter
- E-Print:
- reworded, lates draft