Cloaks for suppression or enhancement of scattering of diffuse photon density waves
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ArticleDescription: Page 3-9; MonthlySubject(s): Online resources:
In:
PRAMANA Journal of Physics, V.91 N.1 Bengaluru: Jawaharlal Nehru Centre for Advanced Scientific Research, 2018.Summary: 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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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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