Cloaks for suppression or enhancement of scattering of diffuse photon density waves

Pramana: Journal of physics

LALRUATFELA RENTHLEI^1¹ 

[1] Department of Physics, Indian Institute of Technology, Kanpur 208 016, India^1

关键词: Cloaking;    random medium;    diffuse photon density waves;    scattering;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

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.

【 授权许可】

CC BY