Study of active superlens and evanescent wave amplification using an active metamaterial model

Transformation optical devices based on the concept of complementary medium have attracted much attention due to their novel properties. A recent paper [H. Chen and C. T. Chan, Opt. Lett. 34, 2649 (2009)] showed a class of complementary medium in bipolar coordinates, which can render the object invisible at a distance. The prescription requires lossless materials composed of negative index medium (NIM), and a certain loss will cut off the cloaking effect of the device. In this paper, we suggest compensation to the lossy NIM by introducing gain media into such a device. For the realization of the whole cloaking device, we present an optimized compensation method to upgrade the function by adding a very thin layer of gain media in the surrounding medium. Numerical simulations demonstrate a dramatic improvement in the cloaking performance when the NIM is lossy.

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Study of active superlens and evanescent wave amplification using an active metamaterial model

Cited by 3 publications

References 27 publications

An effective method for designing new structural left-handed material based on topology optimisation

An effective method for designing new structural left-handed material based on topology optimisation

Design of a novel negative refractive index material based on numerical simulation

Loss compensation in external cloaks using a thin layer of gain media

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