Subwavelength optical imaging through a metallic nanorod array

被引:172
作者
Ono, A [1 ]
Kato, J
Kawata, S
机构
[1] Osaka Univ, Dept Appl Phys, Suita, Osaka 5650871, Japan
[2] RIKEN, Nanophoton Lab, Wako, Saitama 3510198, Japan
关键词
D O I
10.1103/PhysRevLett.95.267407
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We propose a subwavelength imaging system without a lens or a mirror but with an array of metallic nanorods. The near-field components of dipole sources were plasmonically transferred through the rod array to reproduce the source distribution in the other side. We calculated the field distribution at the different planes of imaging process using the finite-difference time-domain algorithm and found that the spatial resolution was 40 nm given by the rod size and spacing. A typical configuration is a hexagonal arrangement of silver rods of 50 nm height and 20 nm diameter. We also show that the image formation highly depends on the coherence and the polarization of the source distribution and the source-array distance.
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页数:4
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