Cosine-Gauss Plasmon Beam: A Localized Long-Range Nondiffracting Surface Wave
Cosine-Gauss Plasmon Beam: A Localized Long-Range Nondiffracting Surface Wave
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DOI：
10.1103/physrevlett.109.093904
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发表时间：
2012-08-31
影响因子：
8.6
通讯作者：
Capasso, Federico
中科院分区：
文献类型：
--
作者：
Lin, Jiao;Dellinger, Jean;Capasso, Federico
本文介绍了一种新的表面波--余弦-高斯光束，它沿直线传播时不发生折射，并与金属表面紧密结合，传播距离可达80 μ m。这种高度本地化的波的产生被证明是简单和高度可控的，具有不同程度的横向限制和方向性，通过制造由交叉金属光栅组成的等离子体发射器。余弦-高斯光束在等离子体中具有应用潜力，特别是有效耦合到纳米光子器件，为下一代光学互连开辟了新的设计可能性。
A new surface wave is introduced, the cosine-Gauss beam, which does not diffract while it propagates in a straight line and tightly bound to the metallic surface for distances up to 80 mu m. The generation of this highly localized wave is shown to be straightforward and highly controllable, with varying degrees of transverse confinement and directionality, by fabricating a plasmon launcher consisting of intersecting metallic gratings. Cosine-Gauss beams have potential for applications in plasmonics, notably for efficient coupling to nanophotonic devices, opening up new design possibilities for next-generation optical interconnects.