Ultra-strong coupling effects with quantum metamaterials |
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Authors: | Jonathan Plumridge Edmund Clarke Ray Murray Chris Phillips |
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Affiliation: | aExperimental Solid State Group, Physics Department, Imperial College, Prince Consort Road, London SW7 2AZ, UK |
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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. |
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Keywords: | A. Quantum wells D. Optical properties |
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