On the defective NR-PC flat lens for lightwave target detection and imaging

被引：0
|
作者：
Lu, Jian [1 ]
Wang, FeiFei [1 ,2 ]
Shen, TingGen [1 ]
机构：
[1] Jiangsu Univ, Inst Appl Phys, Zhenjiang 212013, Peoples R China
[2] Chinese Acad Sci, Kunshan Branch, Inst Microelect, Kunshan, Peoples R China
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2013年 / 111卷 / 03期
基金：
中国国家自然科学基金;
关键词：
NEGATIVE REFRACTION; PHOTONIC CRYSTALS; RESOLUTION; INDEX;
D O I：
10.1007/s00340-013-5339-z
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Influence of the defective cylinder air holes of negative-refraction photonic crystal (NR-PC) lens on the performance of lightwave target detection and imaging are studied with finite-difference time-domain method in the paper. Numerical simulations indicate that significant enhancement of the scattering signal can be obtained using the NR-PC flat lens; consequently, great improvement of the refocusing gain as well as the imaging resolution will be provided. We further study the effect on target detection and imaging using the defective NR-PC flat lens. Using dynamic scanning scheme, it is found that its focusing resolution is better than the non-defective lens. We can also get better resolution by appropriately decreasing the radius of the defective cylinder (R = 0.3a). In conclusion, appropriate radius of the defective cylinder (R = 0.3a) will provide better image resolution.
引用
收藏
页码：351 / 357
页数：7
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