• On the dual symmetry between absorbing and amplifying random media

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    • 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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      Posted on July 25, 2019

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