Mutual mode control of short- and long-range surface plasmons.
Mutual mode control of short- and long-range surface plasmons.
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DOI：
10.1364/oe.21.027402
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发表时间：
2013-11
期刊：
影响因子：
3.8
通讯作者：
J. Takahara;M. Miyata
中科院分区：
文献类型：
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作者：
J. Takahara;M. Miyata
对称金属板波导同时支持两种与金属膜类似的相反类型的传播模式：短程表面等离子体（SRSP）模式和远程表面等离子体（LRSP）模式。类srsp模式的强场约束在纳米光学集成电路中起着至关重要的作用，尽管它的传输长度很短。为了避免场约束和传输长度之间的权衡，我们展示了lrsp模式介导的纳米聚焦的选择模式激发和互模式转换。
A symmetric metal slab waveguide simultaneously supports two opposite types of propagation mode similar to a metal film: short-range surface plasmon (SRSP) like mode and long-range surface plasmon (LRSP) like mode. The strong field confinement of SRSP-like mode plays a crucial role for nano-optical integrated circuits in spite of short propagation length. In order to avoid the trade-off between field confinement and propagation length, we demonstrate selective mode excitation and mutual mode conversion for nanofocusing mediated by LRSP-like mode.