Far-Field Super-Resolution Imaging of Scatterers With a Time-Reversal System Aided by a Grating Plate

Far-Field Super-Resolution Imaging of Scatterers With a Time-Reversal System Aided by a Grating Plate

A time-reversal imaging system for far-field super-resolution imaging of scatterers is proposed. First, a grating plate, similar to the optical far-field super lens, is designed to convert near-field evanescent waves to propagative waves with wavevector modulation. Then, the scattered signals are pr...

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Bibliographic Details
Main Authors: Zhi-Shuang Gong, Bing-Zhong Wang, Yu Yang, Hong-Cheng Zhou, Shuai Ding, Xiao-Hua Wang
Format: Article
Language:English
Published: IEEE 2017-01-01
Series:IEEE Photonics Journal
Subjects:
Super-resolution imaging
far-field
time reversal (TR)
Online Access:https://ieeexplore.ieee.org/document/7784776/
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Summary:A time-reversal imaging system for far-field super-resolution imaging of scatterers is proposed. First, a grating plate, similar to the optical far-field super lens, is designed to convert near-field evanescent waves to propagative waves with wavevector modulation. Then, the scattered signals are processed by a time-reversal (TR) technique and retransmitted back. Finally, the images of the targets are reconstructed by doing demodulation operations in the <italic>k</italic>-domain to the TR field at the refocusing time. Imaging results show that two scatterers separated by 0.1&#x00A0;<italic>&#x03BB;</italic> can be distinguished clearly.
ISSN:1943-0655

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