Articles written in Pramana – Journal of Physics
Volume 91 Issue 1 July 2018 Article ID 0001 Research Article
Cloaks for suppression or enhancement of scattering of diffuse photon density waves
LALRUATFELA RENTHLEI S ANANTHA RAMAKRISHNA HARSHAWARDHAN WANARE
Enhancement of wave-like characteristics of heavily damped diffuse photon density waves in a random medium by amplification can induce strongly localised resonances. These resonances can be used to either suppress or enhance scattering from an inhomogeneity in the random medium by cloaking the inhomogeneous region by a shell of random medium with the correct levels of absorption or amplification. A spherical core–shell structure consisting of a shell of a random amplifying medium is shown to enhance or suppress specific resonant modes. A shell with an absorbing random medium is also shown to suppress scattering which can also be used for cloaking the core region.
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