Shifting media induced super-resolution imaging

Abstract

In this paper, we propose a novel method to achieve super-resolution imaging by utilizing shifting media based on the transformation optics theory. According to the effective medium theory, the homogenous but anisotropic shifting media can be simply replaced by only two kinds of homogenous and isotropic materials in an alternating layered structure. In addition, another scheme of the symmetrical trapezoidal shifting media shells with layered isotropic materials is proposed to realize the super-resolution imaging. Finite element simulations have been performed to prove these ideas.

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.…”

A bi-functional illusion device based on transformation optics

“…In this regard, the actual object was limited to stay outside the device boundaries [52]. Up to now, various illusion devices have been designed for the different functionalities including multi-physical fields (acoustics, thermal-dynamics, and electrostatics [53][54][55]), imaging devices, superscatterers, illusion devices for passive and active scatterer, super absorbers, super resolution, overlapping illusion, shrinking devices, and amplifying devices [56][57][58][59][60][61][62][63] etc.…”

“…In this way, the viewers become unable to obtain the actual information from the target object that is concealed by illusion devices. Since then, illusion devices for various functionalities have been investigated, including superscatterers, illusion devices for passive and active scatterers, shrinking devices, superabsorbers, super resolution imaging devices, and overlapping illusion [53][54][55][56][57][58][59][60]. Moreover, the illusion optics concept has also been further prolonged to multi-physical fields, such as electrostatics, thermal-dynamics, and acoustics [61][62][63].…”