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Updated: Jun 22, 2026

Design, Fabrication, and Experimental Characterization of Plasmonic Photoconductive Terahertz Emitters
Published on: July 8, 2013
Strong light-matter coupling in subwavelength metal-dielectric microcavities at terahertz frequencies
Y Todorov1, A M Andrews, I Sagnes
1Laboratoire "Matériaux et Phénomenes Quantiques," Unversité Paris Diderot-Paris 7, CNRS-UMR 7162, 75013 Paris, France.
Abstract:
We have demonstrated that a metal-dielectric-metal microcavity combined with quantum well intersubband transitions is an ideal system for the generation of cavity polariton states in the terahertz region. The metallic cavity has highly confined radiation modes that can be tuned in resonance with the intersubband transition. In this system we were able to measure a very strong light-matter splitting (the Rabi splitting 2 variant Planck's over 2pi Omega R), corresponding to 22% of the transition energy. We believe this result to be the first demonstration of intersubband polaritons in the terahertz frequency range.
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