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2017 ; 7
(1
): 5729
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Negative Reflecting Meta-Mirrors
#MMPMID28720908
Yang R
; Li D
; Gao D
; Zhang A
; Hu B
; Yang P
; Lei Z
; Li J
Sci Rep
2017[Jul]; 7
(1
): 5729
PMID28720908
show ga
Using the gradient phase discontinuities that meta-mirrors provide, we show that
the incident wave can be reflected anomalously with a broad angle range of
negative reflections. Such reversed behaviors promote the immediate applications
for the planar meta-mirrors to steer the signals more arbitrarily and the convex
meta-mirrors to focus and collimate electromagnetic fields. We practically
implement these negative reflecting meta-mirrors through an arrangement of
subwavelength ring patches and generate the desired phase distribution by also
considering the incident angle. Finally, the experiments are carried out to
verify the functionality of the convex meta-mirror firstly, and the performances
of the planar meta-mirror are also tested by further building up a dual reflector
system with the demonstration of obtaining the plane wave from the convex
meta-mirror and then having the well collimated beam negative reflected by the
planar meta-mirror. The proposed design should be readily applicable to a wide
range of electromagnetic problems, especially for devising smart planar illusion
devices, and highly directive antennas mounting on convex surfaces of various
platforms.
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