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Modal symmetries at the nanoscale: a route toward a complete vectorial near-field mapping

机译:纳米尺度的模态对称性:通往完整矢量近场映射的途径

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We use symmetry considerations to understand and unravel near-field measurements, ultimately showing that we can spatially map three distinct fields using only two detectors. As an example, we create 2D field maps of the out-of-plane magnetic field and two in-plane fields for a silicon ridge waveguide. Furthermore, we are able to identify and remove polarization mixing of less than 1/30 of our experimental signals. Since symmetries are prevalent in nanophotonic structures and their near-fields, our method can have an impact on many future near-field measurements.
机译:我们使用对称性考虑因素来理解和解散近场测量,最终表明我们仅使用两个探测器就可以在空间上绘制三个不同的场。例如,我们为硅脊形波导创建平面外磁场和两个平面内磁场的2D场图。此外,我们能够识别和消除少于1/30的实验信号的极化混合。由于对称性在纳米光子结构及其近场中很普遍,因此我们的方法可能会对未来的许多近场测量产生影响。

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