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arXiv 0904.0153physics.opticsphysics.gen-ph
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Lorenz-Mie解的非Rayleigh极限及负refractive index球散射的抑制

Non-Rayleigh limit of the Lorenz-Mie solution and suppression of the scattering by the spheres of negative refractive index

Andrey E. Miroshnichenko

摘要:

研究了负折射率材料球的光散射。我们表明,光的散射效率并不总是服从众所周知的瑞利定律$Q_{\rm sca}\sim1/λ^4$的尺寸参数的小值,但可以是波长无关的$Q_{\rm sca}\sim const$,甚至随着波长的$Q_{\rm sca}\simλ^2$。此外,还发现半径与入射波长相当的球可以抑制任意方向的散射,特别是前向散射。它可以被认为是球的布鲁斯特角的类似物。

英文摘要:

We study light scattering by spheres made of negative refractive index materials. We demonstrate that scattering efficiency of the light does not always obey the well-known Rayleigh's law $Q_{\rm sca}\sim1/λ^4$ for small values of size parameter, but could be wavelength independent $Q_{\rm sca}\sim const$, or even increase with the wavelength as $Q_{\rm sca}\simλ^2$. In addition, it is found that spheres with radius comparable with the input wavelength may exhibit suppression of the scattering in any directions, particularly in forward one. It can be considered as analogues of Brewster's angles for spheres.

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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