Near field imaging in microwave regime using double layer split-ring resonator based metamaterial |
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| Authors: | K Guven E Ozbay |
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| Institution: | (1) Nanotechnology Research Centre, Bilkent University, 06-800 Ankara, Turkey;(2) Department of Physics, Bilkent University, 06-800 Ankara, Turkey;(3) Department of Electrical and Electronics Engineering, Bilkent University, 06-800 Ankara, Turkey |
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| Abstract: | A planar metamaterial structure consisting of two layers of split-ring resonator (SRR) arrays is demonstrated to form the
image of a point source with subwavelength resolution. The source frequency is swept through the resonance gap of the metamaterial
layers and the lateral field intensity distribution is recorded on the transmission side of the metamaterial. When the source
is tuned to the resonance frequency of SRRs, the metamaterial acts as a high permeability medium and a distinct image with
subwavelength resolution in the lateral direction is obtained. Increasing the distance between the individual SRR layers reduces
the interlayer coupling, and the intensity and spatial resolution of the image decrease rapidly. |
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| Keywords: | metamaterial subwavelength imaging near field imaging |
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