Experimental investigation of superfocusing of plasmonic lens with chirped circular nanoslits

被引：48

作者：

Fu, Yongqi ^{[1
,2
]}

Liu, Yu ^{[1
]}

Zhou, Xiuli ^{[1
]}

Xu, Zongwei ^{[3
]}

Fang, Fengzhou ^{[3
]}

机构：

[1] Univ Elect Sci & Technol China, Sch Phys Elect, Chengdu 610054, Sichuan Prov, Peoples R China

[2] Chinese Acad Sci, Inst Opt & Elect, State Key Lab Opt Technol Microfabricat, Chengdu 610209, Peoples R China

[3] Tianjin Univ, Ctr Micronano Mfg Technol, State Key Lab Precis Measuring Technol & Instrume, Tianjin, Peoples R China

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 04期

基金：

中国国家自然科学基金;

关键词：

SURFACE-PLASMONS; LIGHT; TRANSMISSION; METAL;

D O I：

10.1364/OE.18.003438

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

A plasmonic lens with metallic chirped circular nanoslits corrugated on Au film supported on quartz substrate for the purpose of superfocusing was put forth and fabricated by means of focused ion beam direct milling technique. Topography of the lens was imaged using an atomic force microscope. After that a near-field scanning optical microscope was employed for optical characterization of focusing performance of the lens. Our experimental results verify the focusing performance and further demonstrate that they are in agreement with the theoretical calculation results. Focusing performance is significantly improved in comparison to that of the non-chirped lens. The lenses are possible to be used for the applications of bioimaging, detection, and inspection in submicron scale resolution. (C) 2010 Optical Society of America

引用

页码：3438 / 3443

页数：6

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