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Optical Engineering

Refocusing resolution based on negative refractive-photonic crystal group with Ag defects for target detection and imaging
Author(s): Yingfei Lian; Na Zhu; Yuntuan Fang; Jiwen Sun; Junlv Chen; Huili Qian
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Paper Abstract

Negative refractive-photonic crystal (NR-PC) lenses that can exceed the diffraction limit of focus resolution for imaging and target detection in the near field have gotten more and more special attention in recent years. Three flat lens groups with Ag defects based on NR-PC are designed, and the focusing imaging in the NR-PC three flat lens groups is concluded with the extension of Snell’s law, and the influence on the resolution for a target detection dynamic scanning scheme is simulated by using the finite difference time domain method. An optimal-doped structure with Ag defects is achieved by different simulation combinations. The refocusing resolution 0.18834λ is achieved in the optimal structure and there is approximately a 0.06806λ improvement in the refocusing resolution compared to those undoped with Ag (0.2564λ); it also possesses distinct smaller side-lobes than a single flat lens doped with Ag. This means the optimal detecting ability for the three NR-PC flat lens groups with Ag defects is more improved than that for a single undoped and doped with Ag. This is significant for the perfect imaging being achieved for a particle structure.

Paper Details

Date Published: 9 March 2015
PDF: 8 pages
Opt. Eng. 54(3) 037102 doi: 10.1117/1.OE.54.3.037102
Published in: Optical Engineering Volume 54, Issue 3
Show Author Affiliations
Yingfei Lian, Jiangsu Univ. (China)
Na Zhu, Jiangsu Univ. (China)
Yuntuan Fang, Jiangsu Univ. (China)
Jiwen Sun, Jiangsu Univ. (China)
Junlv Chen, Jiangsu Univ. (China)
Huili Qian, Jiangsu Univ. (China)

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