Research on light-wave target detection and imaging by using NR-PC flat lens with active impurities

Author(s): F. Wang ; J. Sun ; T. Shen ; Y. Xu ; W. Meng ; Z. Li ; B. Yuan
DOI: 10.1049/iet-opt.2011.0079

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Author(s): F. Wang ¹ ; J. Sun ² ; T. Shen ¹ ; Y. Xu ³ ; W. Meng ³ ; Z. Li ⁴ ; B. Yuan ¹
- Affiliations: 1: Institute of Applied Physics, Jiangsu University, Zhenjiang, People's Republic of China
  2: Communication Department, Power Supply Company in Wuhu, Wuhu, People's Republic of China
  3: Department of Telecommunication Engineering, Jiangsu University, Zhenjiang, People's Republic of China
  4: Communication T&R Section, Zhenjiang Watercraft College, Zhenjiang, People's Republic of China
Source: Volume 6, Issue 3, June 2012, p. 121 – 126
DOI: 10.1049/iet-opt.2011.0079 , Print ISSN 1751-8768, Online ISSN 1751-8776

The authors mainly use the two-dimensional finite-difference time-domain method to study the effection on image resolution of target detection and imaging when active impurities are introduced to negative refraction photonic crystals (NR-PC) flat lens. It is demonstrated that because of the influence of the mini-forbidden band and resonance excitation effect, high transmissivity will appear at the resonance frequency of 0.3068(a/λ) when the light wave goes through the NP-PC lens. Also, the results show that the refocused wave backscattered from a target is significantly stronger than the directly backscattered wave when no NR-PC flat lens is applied. Further studies demonstrated that the introduction of active impurities into NR-PC lens provides improved refocusing and image resolution. In conclusion, the authors' investigation optimises the performance of the focus-scanning scheme, and provides the basis for converting an idealised left-handed materials (LHM) lens into a physically realisable NR-PC flat lens.

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Research on light-wave target detection and imaging by using NR-PC flat lens with active impurities

Research on light-wave target detection and imaging by using NR-PC flat lens with active impurities

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