期刊
APPLIED PHYSICS B-LASERS AND OPTICS
卷 104, 期 4, 页码 919-924出版社
SPRINGER
DOI: 10.1007/s00340-011-4604-2
关键词
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资金
- National Natural Science Foundation of China [10874004, 10874010, 10821062]
- National Key Basic Research Program [2007CB307001]
A planar five-layer waveguide with a metal-insulator (with the low permittivity)-metal structure embedded in a high-permittivity dielectric is theoretically studied. A long-range surface mode draws special attention because of its superior properties of low attenuation and a large field localized inside the nanoscale middle gap provided with permittivity-contrast. Effects of the surrounding permittivity and the metal film thickness are investigated, and the electric field amplitude in the gap can be dozens of times higher than that at the outer interfaces. This plasmonic structure may have potential applications in integrated photonic devices.
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