非线性光束整形的等离子体超表面

2017 Photonics North (PN) Pub Date : 2017-06-01 DOI:10.1109/PN.2017.8090590

Antonio Calà Lesina, P. Berini, L. Ramunno

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引用次数: 0

摘要

为了形成远场非线性辐射，探讨了控制超表面中每个元原子的非线性发射。通过在表面上排列金间隙纳米结构，并利用金属或间隙材料的非线性发射，我们在数值上证明了在线性等离子体无法达到的频率下产生高纯度涡旋光束。

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Plasmonic metasurfaces for nonlinear beam shaping

Controlling the nonlinear emission from each meta-atom in a metasurface is explored for the shaping of far-field nonlinear radiation. By arranging gold gap-nanostructures on a surface and by exploiting the nonlinear emission from the metal or from the gap material, we numerically demonstrate the creation of highly pure vortex beams at frequencies not accessible by linear plasmonics.

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2017 Photonics North (PN)

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