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arXiv 1402.5928physics.optics
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具有贝塞尔特征的非傍轴保形Airy光束

Nonparaxial shape-preserving Airy beams with Bessel signature

Carlos J. Zapata-Rodriguez, Mahin Naserpour

摘要:

作为麦克斯韦方程组的解的空间加速光束可以沿着不完整的圆形轨迹传播,在此之后,衍射展宽接管并且光束展开。将这些截断贝塞尔波场近似到傍轴极限,一些作者认为它恢复了已知的艾里光束(AiBs)。基于光场的角谱表示,我们证明了近轴近似严格导致离轴聚焦光束,而不是有限能量的AiBs。后者将出现在非傍轴方法的保护伞下,用椭圆轨迹代替抛物线。从全波模拟的偏差出现更严重的光束定位,而不是它的本地配置文件。

英文摘要:

Spatially accelerating beams that are solutions to the Maxwell equations may propagate along incomplete circular trajectories, after which diffraction broadening takes over and the beams spread out. Taking these truncated Bessel wave fields to the paraxial limit, some authors sustained that it is recovered the known Airy beams (AiBs). Based on the angular spectrum representation of optical fields, we demonstrated that the paraxial approximation rigorously leads to off-axis focused beams instead of finite-energy AiBs. The latter will arise under the umbrella of a nonparaxial approach following elliptical trajectories in place of parabolas. Deviations from full-wave simulations appear more severely in beam positioning rather than its local profile.

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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