• Absorption and dispersion in metamaterials: Feasibility of device applications

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      https://www.ias.ac.in/article/fulltext/pram/075/05/0837-0854

    • Keywords

       

      Metamaterials; resonant tunnelling; group delay; perfect imaging; perfect absorption.

    • Abstract

       

      We present a quantitative study of the effects of losses in layered media with a metamaterial layer as the constituent. The metamaterial is modelled by a causal isotropic effective medium (Lorentz-type) response. The parameters for the model are picked from a recent experiment. Two specific examples, namely, that of resonant tunnelling (RT) and imaging are chosen to demonstrate the devastating effects of losses in the present day metamaterials. It is then shown how large delays in RT, as well as near perfect imaging can be restored in gain-doped metamaterials. We also point out yet another use of metamaterials for achieving near perfect absorption, and its use for probing strong atom–field interaction.

    • Author Affiliations

       

      Subimal Deb1 S Dutta Gupta1

      1. School of Physics, University of Hyderabad, Hyderabad 500 046, India
    • Dates

       
  • Pramana – Journal of Physics | News

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