Subwavelength-resolved bidirectional imaging between two and three dimensions using a surface plasmon launching lens

Jiayuan Wang; Jiasen Zhang; Xiaofei Wu; Hao Luo; Qihuang Gong
February 2009
Applied Physics Letters;2/23/2009, Vol. 94 Issue 8, p081116
Academic Journal
We demonstrate subwavelength-resolved bidirectional conjugate imaging between three-dimensional far-field and two-dimensional surface plasmon (SP) by using a SP launching lens (SPLL), which consists of multiple groove zones that is designed according to the Fresnel zone on a gold film. Resolvable separations between two SP point sources of 704 and 668 nm were obtained for far-field to SP and the contrary, respectively, at λ=830 nm. The SPLL shows similar imaging properties to a traditional optical lens, which can be used to connect multiple channels between far-field and SP.


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