Homogeneous Multifunction Devices Designing and Layered Implementing Based on Rotary Medium

Abstract

Multifunctional device with homogeneous anisotropic material parameters are proposed and designed based on linear transformation optics and rotary medium. Four examples including rotating concentrator, rotating amplifying device, rotating shrinking device and rotating transparent device are reported. All of them have bi-functional effects, i.e., they possess concentrating, amplifying, shrinking and transparent effects respectively while have the fields been rotated an angle of π/N simultaneously in common, where N is the sides number of polygon. All these devices have potential applications, such as energy accumulation or controlling, military camouflage, wireless communication system and radar/antenna protection. Furthermore, alternating isotropic layered structure based on effective medium theory is utilized to remove the anisotropic property of these devices. Simulation results show that the layered structure device behaves almost as perfect as the ideal one when it has sufficient divided layers. The feasibility of designing multifunctional device by natural isotropic materials instead of metamaterials with complicated artificial composite structure would dramatically reduce the fabrication difficulty and move the device a step further towards the practical application.

Research on Demand Design Method of Cross Polarization Converter Metasurface Based on Depth Generation Model

“…These special properties of metamaterials have been widely used in the fields of super resolution imaging [1], optics [2][3], nonlinear optics [4], filters [5] and so on. Some important electromagnetic devices such as electromagnetic invisibility cloaks [6][7][8], illusionary devices [9][10][11], electromagnetic concentrators [12] and so on have been developed. As a two-dimensional electromagnetic metamaterial, the cross-polarization conversion (CPC) metasurface [13] plays an important role in the polarization regulation of electromagnetic waves for its features such as lightweight, easy to develop, and strong commonality.…”

Homogeneous material based acoustic concentrators and rotators with linear coordinate transformation

“…It has motivated a series of researches 2 , such as cloaks 3 – 6 , illusion devices 7 , 8 , lenses 9 , 10 and antennas 11 . Besides, the concentrators 12 and rotators 13 , which can increase and rotate the EM energy in the inner region, have also attracted remarkable attention.…”

Design of open devices based on multi-folded transformation optics

“…AS an ingenious mathematical approach, transformation optics (TO) [1][2][3][4][5][6] provides a powerful and convenient way to control the electromagnetic (EM) fields arbitrarily, arousing much attentions in the past two decades. Based on this methodology, novel devices with varied functions and applications have been proposed, designed and experimented with an unprecedented prosperity, including invisible cloaks [7][8][9][10][11][12][13], concentrators [14][15][16][17][18], illusory devices [19][20][21][22][23][24][25][26][27][28] and antennas [29][30][31][32][33][34][35] etc. The most striking device among them is invisible cloak, where some properly designed materials are utilized to direct the EM waves propagates smoothly around an arbitrarily shaped object, making the entire device (including the coated object) become invisible for the outside viewers.…”