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arXiv 1801.04832physics.optics
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径向和方位偏振矢量光束聚焦散射中的横向自旋

Transverse spin in scattering of focused radially and azimuthally polarized vector beams

Ankit Kumar Singh, Sudipta Saha, Subhasish Dutta Gupta, Nirmalya Ghosh

摘要:

研究了径向和方位偏振矢量光束聚焦对Mie粒子散射波的自旋角动量密度和坡印廷矢量的影响。值得注意的是,研究表明,SAM的散射场的密度是完全横向的径向和方位角偏振入射矢量光束的性质,但坡印廷矢量显示通常的纵向字符。我们还证明了横向SAM密度可以进一步调谐波长和聚焦的入射光束,通过利用不同的散射模式的干涉。这些结果可能会激发进一步的实验技术来探测横自旋和贝琳凡特自旋动量密度。

英文摘要:

We study the effect of focusing of the radially and azimuthally polarized vector beams on the spin angular momentum (SAM) density and Poynting vector of scattered waves from a Mie particle. Remarkably, the study reveals that the SAM density of the scattered field is solely transverse in nature for radially and azimuthally polarized incident vector beams; however the Poynting vector shows usual longitudinal character. We also demonstrate that the transverse SAM density can further be tuned with wavelength and focusing of the incident beam by exploiting the interference of different scattering modes. These results may stimulate further experimental technique of detecting the transverse spin and Belinfante's spin-momentum densities.

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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