Frontiers of Optoelectronics, Volume. 2, Issue 4, 429(2009)
Design of rotators based on coordinate transformation
Traditional cloak and rotator are obtained from mapping in single direction, either radial or tangential direction. However, this article proposed several novel structures obtained from mapping along multidirection, all of above designs are based on coordinate transformation theory. Those structures include “rotational cloak”, “rotational concentrator”, and so on, which are different from traditional structures. This paper discusses the optical properties of these novel structures; moreover, we have investigated the effects of various parameters on their properties, such as virtual radius and initial angle. Also, some interesting conclusions are drawn: 1) the energy convergent capability increases with virtual radius; 2) rotational angle of power flow direction depends on the value of initial angle and the location of optical source; 3) the permittivity and permeability of transformed material may be negative when virtual radius a greater than outer radius b, it is our well-known left-handed material.
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Dongxu GU, Ming ZHAO, Xiuhua YUAN, Dexiu HUANG. Design of rotators based on coordinate transformation[J]. Frontiers of Optoelectronics, 2009, 2(4): 429
Received: Jul. 30, 2009
Accepted: Sep. 24, 2009
Published Online: Oct. 8, 2012
The Author Email: ZHAO Ming (zhaoming@mail.hust.edu.cn)