Infrared carpet cloak designed with uniform silicon grating structure

Xu, Xiaofei; Feng, Yijun; Hao, Yu; Zhao, Juming; Jiang, Tian
November 2009
Applied Physics Letters;11/2/2009, Vol. 95 Issue 18, p184102
Academic Journal
Through a particularly chosen coordinate transformation, we propose an optical carpet cloak that only requires homogeneous anisotropic dielectric material. The proposed cloak could be easily imitated and realized by alternative layers of isotropic dielectrics. To demonstrate the cloaking performance, we have designed a two-dimensional version that a uniform silicon grating structure fabricated on a silicon-on-insulator wafer could work as an infrared carpet cloak. The cloak has been validated through full wave electromagnetic simulations, and the nonresonance feature also enables a broadband cloaking for wavelengths ranging from 1372 to 2000 nm.


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