光隧道中的三维偏振效应,Journal of the Optical Society of America A

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光隧道中的三维偏振效应
Journal of the Optical Society of America A ( IF 1.4 ) Pub Date : 2023-09-08 , DOI: 10.1364/josaa.499914
Mengwen Guo ₁ , Andreas Norrman ₁ , Ari T. Friberg ₁ , Jose J. Gil ₂ , Tero Setälä ₁

Affiliation

我们考虑由随机平面波在双棱镜系统间隙中激发的倏逝光场的三维 (3D) 偏振特性。该分析涵盖受抑全内反射 (FTIR)（即光学隧道）的情况，并依赖于3 × 3 $3 \times 3$ 偏振矩阵的特征分解。我们特别发现，对于任何入射的部分偏振平面波，间隙内的倏逝场必然处于不规则的、真正的 3D 偏振态。我们还表明，第二边界处场的 3D 偏振特性对间隙宽度的变化敏感，并且当平面波的入射角变大时，较小的宽度会出现相关影响。这项工作的结果揭示了真正 3D 渐逝场的偏振结构的新方面，并可能在近场光学和表面纳米光子学中找到应用。

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Three-dimensional polarization effects in optical tunneling

We consider the three-dimensional (3D) polarimetric properties of an evanescent optical field excited in the gap of a double-prism system by a random plane wave. The analysis covers the case of frustrated total internal reflection (FTIR), i.e., optical tunneling, and relies on the characteristic decomposition of the 3×3 $3 \times 3$ polarization matrix. We find in particular that, for any incident partially polarized plane wave, the evanescent field inside the gap is necessarily in a nonregular, genuine 3D polarization state. We also show that the 3D polarimetric properties of the field at the second boundary are sensitive to the changes of the gap width and that the relevant effects occur for the smaller widths when the angle of incidence of the plane wave becomes larger. The results of this work uncover new aspects of the polarimetric structure of genuine 3D evanescent fields and may find applications in near-field optics and surface nanophotonics.

更新日期：2023-09-08

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