Electromagnetically Induced Transparency and Absorption in Metamaterials: The Radiating Two-Oscillator Model and Its Experimental Confirmation

TitleElectromagnetically Induced Transparency and Absorption in Metamaterials: The Radiating Two-Oscillator Model and Its Experimental Confirmation
Publication TypeJournal Article
Year of Publication2012
AuthorsTassin P, Zhang L, Zhao RK, Jain A, Koschny T, Soukoulis CM
Journal TitlePhysical Review Letters
Volume109
Pages187401
Date Published10
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberWOS:000310434400032
Keywordsatomic medium, classical analog, light, pulses, slow
Abstract

Several classical analogues of electromagnetically induced transparency in metamaterials have been demonstrated. A simple two-resonator model can describe their absorption spectrum qualitatively, but fails to provide information about the scattering properties-e.g., transmission and group delay. Here we develop an alternative model that rigorously includes the coupling of the radiative resonator to the external electromagnetic fields. This radiating two-oscillator model can describe both the absorption spectrum and the scattering parameters quantitatively. The model also predicts metamaterials with a narrow spectral feature in the absorption larger than the background absorption of the radiative element. This classical analogue of electromagnetically induced absorption is shown to occur when both the dissipative loss of the radiative resonator and the coupling strength are small. These predictions are subsequently demonstrated in experiments.

URL<Go to ISI>://WOS:000310434400032
DOI10.1103/PhysRevLett.109.187401
Alternate JournalPhys. Rev. Lett.