期刊
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
卷 27, 期 27, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217979213501488
关键词
Transformation optics; innovative cloak; metamaterials; finite element method
资金
- National Natural Science Foundations of China [61161007, 61261002]
- Scientific Research Fund Major Project of the Education Bureau of Yunnan Province [ZD2011003]
- Natural Science Foundation of Yunnan Province [2011FB018]
- Doctoral Program of Higher Education [20125301120009]
Transformation optics-based innovative cloak which combines the virtues of both internal and external cloaks to enable arbitrary multi-objects hidden with visions and movements was first proposed by Huang et al. [Appl. Phys. Lett. 101, 151901 ( 2012)]. But it is rather difficult to implement in practice, for the required material parameters vary with radius and even have singular values. To accelerate its practical realization but still keep good performance of invisibility, a simplified innovative cloak with only spatially varying axial parameter is developed via choosing appropriate transformation function. The advantage of such a cloak is that both radial and azimuthal parameters are constants, and all three components are nonsingular and finite. Full-wave simulation confirms the perfect cloaking effect of the cloak. Besides, the influences of metamaterials loss and parameter deviation on the performance of cloak are also investigated. This work provides a simple and feasible solution to push metamaterial-assisted innovative cloak more closely to the practice.
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