• On the dual symmetry between absorbing and amplifying random media

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      https://www.ias.ac.in/article/fulltext/pram/062/06/1273-1279

    • Keywords

       

      Random laser; Anderson localization; waves in disordered media

    • Abstract

       

      We re-examine the dual symmetry between absorbing and amplifying random media. By analysing the physically allowed choice of the sign of the square root to determine the complex wave vector in a medium, we draw a broad set of conclusions that enables us to resolve the apparent paradox of the dual symmetry and also to anticipate the large local electromagnetic field enhancements in amplifying random media.

    • Author Affiliations

       

      S Anantha Ramakrishna1

      1. Department of Physics, Indian Institute of Technology, Kanpur - 208 016, India
    • Dates

       
  • Pramana – Journal of Physics | News

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