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Numerical research on properties of optical-wave target detection and imaging from NR-PC flat lens |
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| Authors: | T G Shen W J Meng J Sun Z H Li B G Yuan G Wang M Huang |
| Institution: | 1. Institute of Applied Physics, Jiangsu University, Zhenjiang, 212013, China 2. Department of Telecommunication Engineering, Jiangsu University, Zhenjiang, 212013, China 3. Telecommunication T&R Section, Zhenjiang Watercraft College, Zhenjiang, 212003, China |
| Abstract: | The characteristics of optical-wave target detection and imaging from a negative-refraction photonic crystal (NR-PC) flat lens are studied with a two-dimensional (2D) finite-difference time-domain (FDTD) method in the paper. The results show that there exists a transmission peak, with a value far greater than unit, resulting from the influence of the mini-forbidden bands and resonance excitation effect at resonance frequency. Also, the refocusing of backscattered optical wave from the target leads to its image with a sub-wavelength lateral resolution and great amplitude as long as the target is placed at the focus of the NR-PC flat lens. Therefore, the NR-PC flat lens will find many implications in optical area, especially in the detection and imaging of small targets. |
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