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Volume 26 - ICOP & ICPET 2020
ICOP & ICPET _ INPC _ ICOFS 2020, 26 - ICOP & ICPET 2020: 609-612 |
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Khanpour M A, Baradaran Ghasemi A H. Forward and Backward Scattering Efficiency of Invisibility Cloak. ICOP & ICPET _ INPC _ ICOFS 2020; 26 :609-612
URL: http://opsi.ir/article-1-2131-en.html
URL: http://opsi.ir/article-1-2131-en.html
Abstract: (1581 Views)
Invisibility Cloak manage to hide the object from the observer by matching the transient and incident wave phases and by decreasing the amount of scattering from the interaction between incident wave and object. By separating total efficiency into the forward and backward scattering Efficiencies in an invisibility cloak, we study the effects of incident wave frequency, Cloak Thickness and attenuation coefficient on both these efficiencies. The cloak is simulated by dispersive Finite-difference Time-Domain (FDTD) method based on transformation optics. Results show that forward and backward scattering efficiencies have different responses toward these changes compared to total efficiency of the cloak which is usually studied in scientific papers. For example, although the forward scattering efficiency decreases sharply by increasing the attenuation coefficient in the cloak, it has little effect on the backward scattering efficiency. Moreover, the maximum of total efficiency and the maximum of forward and backward scattering efficiencies do not occur at the same incident wave frequency. Likewise by increasing thickness of the cloak, forward scattering efficiency shows an oscillating behavior.
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