Induced transparency by coupling of Tamm and defect states in tunable terahertz plasmonic crystals
| Autor: | Eric A. Shaner, Don Bethke, Gregory R. Aizin, Gregory C. Dyer, Albert D. Grine, John L. Reno, S. James Allen |
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| Rok vydání: | 2013 |
| Předmět: |
Coupling
Materials science Condensed Matter - Mesoscale and Nanoscale Physics Terahertz radiation business.industry Electromagnetically induced transparency FOS: Physical sciences Physics::Optics Physics::Classical Physics Physics - Plasma Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Plasma Physics (physics.plasm-ph) Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Physics::Atomic and Molecular Clusters Optoelectronics Transparency (data compression) business Plasmon Physics - Optics Optics (physics.optics) |
| Zdroj: | Nature Photonics. 7:925-930 |
| ISSN: | 1749-4893 1749-4885 |
| DOI: | 10.1038/nphoton.2013.252 |
| Popis: | Photonic crystals and metamaterials have emerged as two classes of tailorable materials that enable precise control of light. Plasmonic crystals, which can be thought of as photonic crystals fabricated from plasmonic materials, Bragg scatter incident electromagnetic waves from a repeated unit cell. However, plasmonic crystals, like metamaterials, are composed of subwavelength unit cells. Here, we study terahertz plasmonic crystals of several periods in a two dimensional electron gas. This plasmonic medium is both extremely subwavelength ($\approx \lambda/100$) and reconfigurable through the application of voltages to metal electrodes. Weakly localized crystal surface states known as Tamm states are observed. By introducing an independently controlled plasmonic defect that interacts with the Tamm states, we demonstrate a frequency agile electromagnetically induced transparency phenomenon. The observed 50% ${\it in-situ}$ tuning of the plasmonic crystal band edges should be realizable in materials such as graphene to actively control the plasmonic crystal dispersion in the infrared. |
| Databáze: | OpenAIRE |
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