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Far-Field Super-Resolution Imaging of Scatterers With a Time-Reversal System Aided by a Grating Plate
- Source :
- IEEE Photonics Journal, Vol 9, Iss 1, Pp 1-8 (2017)
- Publication Year :
- 2017
- Publisher :
- IEEE, 2017.
-
Abstract
- 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 k-domain to the TR field at the refocusing time. Imaging results show that two scatterers separated by 0.1 λ can be distinguished clearly.
Details
- Language :
- English
- ISSN :
- 19430655
- Volume :
- 9
- Issue :
- 1
- Database :
- Directory of Open Access Journals
- Journal :
- IEEE Photonics Journal
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.9e71bd55ba3c430bb07c7e19cad000da
- Document Type :
- article
- Full Text :
- https://doi.org/10.1109/JPHOT.2016.2640661