2009/08/22 by Sangeeta Chakrabarti, S. Anantha Ramakrishna, Harshawardhan Wanare · 7 citations
Engineering · Materials Science · Physics and Astronomy · #Dielectric #Electric field #Electromagnetic radiation #Electromagnetically induced transparency #Metamaterial #Metamaterials and Metasurfaces Applications #Nanorod #Negative refraction #Permittivity #Plasmonic and Surface Plasmon Research #Quantum optics and atomic interactions #Tunable metamaterials #physics.optics
paper · pdf · doi:10.1364/ol.34.003728
published in Optics Letters 34(23), 3728 (Optica Publishing Group) · 9 pages, 3 figures
arxiv created 2009/08/22 · openalex publication_date 2009/11/26 · arxiv updated 2015/05/14 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We theoretically demonstrate control of the plasmalike effective response of a metamaterial composed of aligned metallic nanorods when the electric field of the incident radiation is parallel to the nanorods. By embedding this metamaterial in a coherent atomic/molecular medium, for example, silver nanorod arrays submerged in sodium vapor, we can make the metamaterial transmittive in the forbidden frequency region below its plasma frequency. This phenomenon is enabled by having Lorentz absorbers or other coherent processes in the background medium, which provide a large positive dielectric permittivity in the vicinity of the resonance, thereby rendering the effective permittivity positive. In particular, processes such as electromagnetically induced transparency are shown to provide additional control to switch and tune the new transmission bands.