Fabrication of non-planar silver nano-arc-gap arrays

Yang Shen; Mingkai Liu; Qianjin Wang; Peng Zhan; Zhenlin Wang; Qiangzhong Zhu; Xia Chen; Shaoji Jiang; Xuehua Wang; Chongjun Jin

doi:10.1039/C2NR30152K

Fabrication of non-planar silver nano-arc-gap arrays

Yang Shen,^a Mingkai Liu,^a Qianjin Wang,^b Peng Zhan,^b Zhenlin Wang,^b Qiangzhong Zhu,^a Xia Chen,^a Shaoji Jiang,^a Xuehua Wang^a and Chongjun Jin*^a

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^a State Key laboratory of optoelectronic materials and technologies, School of Physics and Engineering, Sun Yat-Sen University, Guangzhou, China
E-mail: jinchjun@mail.sysu.edu.cn
Fax: +862084112282
Tel: +862084112282

^b Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, China

Abstract

We developed a method to fabricate an array of silver non-planar nano-arc-gaps via inverted hemispherical colloidal lithography and shadow metal evaporation methods. It is found that there is a localized surface plasmon mode which results in extraordinary optical transmission. The electric field is strongly localized at the nano-arc-gap region and therefore induces a resonance that has an ultra-small mode volume of less than 2.44 × 10⁻⁶ μm³. The ratio of the quality factor to the mode volume is as high as 1.44 × 10⁶ μm⁻³. This would be valuable for the design of optoelectric circuits.

Nanoscale

Fabrication of non-planar silver nano-arc-gap arrays

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