Lee Jeng Yi, Chen Yi-Huan, Chen Pai-Yen
Department of Opto-Electronic Engineering, National Dong Hwa University, Hualien, 974301, Taiwan.
Department of Electrical and Computer Engineering, University of Illinois at Chicago, Chicago, Illinois, 60607, USA.
Sci Rep. 2021 Sep 20;11(1):18657. doi: 10.1038/s41598-021-98011-x.
We theoretically and numerically prove that under an electromagnetic plane wave with linear polarization incident normally to a single nanowire, there exists a power diagram that could indicate scattering properties for any system configurations, material parameters, and operating wavelength. We demonstrate the distinct power distribution boundary in absorption, scattering, and extinction for a generalized nanowire with any partial wave modes dominant. In the boundary, each dominant scattering coefficients remain constant, and its energy performance would display superabsorbers or superscatterers. Interestingly, for a system with larger partial wave modes dominant, the occupied domain in the power diagram could completely cover that with lower ones. Hence, a system with different levels of partial wave modes can display the same power results, reflecting the degeneracy. This degenerate property could release more degrees of freedom in design of energy harvesting devices and sensors. We demonstrate several systems based on realistic materials to support our findings.
我们从理论和数值上证明，在垂直入射到单个纳米线的线偏振电磁平面波作用下，存在一种功率图，它可以指示任何系统配置、材料参数和工作波长下的散射特性。我们展示了具有任何主导部分波模式的广义纳米线在吸收、散射和消光方面的独特功率分布边界。在该边界中，每个主导散射系数保持不变，其能量性能将表现为超吸收体或超散射体。有趣的是，对于具有较大主导部分波模式的系统，功率图中的占据域可以完全覆盖具有较低主导部分波模式的系统。因此，具有不同部分波模式水平的系统可以显示相同的功率结果，这反映了简并性。这种简并特性可以在能量收集装置和传感器的设计中释放更多的自由度。我们展示了几个基于实际材料的系统来支持我们的发现。
