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Optics Express

Optics Express

  • Editor: Andrew M. Weiner
  • Vol. 22, Iss. 3 — Feb. 10, 2014
  • pp: 3199–3207

Interaction between meta-materials and shallow donors in bulk GaN at THz frequency

Laurent Nevou, Etienne Giraud, Fabrizio Castellano, Nicolas Grandjean, and Jerome Faist  »View Author Affiliations

Optics Express, Vol. 22, Issue 3, pp. 3199-3207 (2014)

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We report the coupling and interaction between shallow donors and microcavities in bulk GaN at THz frequencies. At 4K, the shallow donors lead to an absorption at 23.5 meV (5.7 THz) under optical pumping above the bandgap of GaN. The microcavities are based on metamaterials and are designed to resonate around 5.7 THz. At 4 K, the matter-cavity interaction is clearly demonstrated on differential transmission of the sample. The cavity resonance shifts when the absorption occurs. Our model and simulations are in good agreement with the experimental data.

© 2014 Optical Society of America

OCIS Codes
(130.5990) Integrated optics : Semiconductors
(040.2235) Detectors : Far infrared or terahertz
(160.3918) Materials : Metamaterials
(140.3945) Lasers and laser optics : Microcavities

ToC Category:

Original Manuscript: September 30, 2013
Revised Manuscript: December 14, 2013
Manuscript Accepted: January 9, 2014
Published: February 4, 2014

Laurent Nevou, Etienne Giraud, Fabrizio Castellano, Nicolas Grandjean, and Jerome Faist, "Interaction between meta-materials and shallow donors in bulk GaN at THz frequency," Opt. Express 22, 3199-3207 (2014)

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