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arXiv 1710.09092physics.opticscond-mat.mtrl-sci
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PT偶极子的散射特性

Scattering properties of a PT dipole

K. Staliunas, P. Markoš, V. Kuzmiak

摘要:

对PT偶极子的电磁响应进行了解析和数值研究。在解析法中,偶极子被表示为两个点散射体。在第一玻恩近似下,证明了散射场关于偶极子取向的不对称性。在数值模拟中,偶极子由两个无限长、折射率虚部符号相反的平行圆柱体表示。数值数据证实了在弱散射极限的玻恩近似的有效性,而显着偏离玻恩近似观察到较强的散射体和近场范围。

英文摘要:

Electromagnetic response of PT-dipole is studied both analytically and numerically. In analytical approach, dipole is represented by two point scatterers. Within the first Born approximation, the asymmetry of the scattering field with respect to the orientation of dipole is proven. In numerical simulations, dipole is represented by two infinitely long, parallel cylinders with opposite sign of imaginary part of refractive index. Numerical data confirm the validity of the Born approximation in the weak scattering limit, while significant deviations from the Born approximation were observed for stronger scatterers and in the near-field range.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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