论文标题
小束腰部光学涡旋的手性和螺旋性
Chirality and helicity of optical vortices of small beam waists
论文作者
论文摘要
研究了线性极化的拉瓜仪（LG）梁的手性和螺旋。当它的光束腰部足够小时，因此具有大量的纵向场，因此产生了非零的手性和螺旋性。在最简单的情况下，绕组数的甜甜圈束$ \ ell = 1 $，另一个与之相同，但具有$ \ ell = -1 $，我们在焦平面上获得了不同的手性和螺旋分布$ z = 0 $。我们还表明，这种手性行为持续存在，并且模式的发展，因此在$ z <0 $和$ z> 0 $的平面上，光束收敛对手性和螺旋分布的变化有所不同。
The chirality and helicity of linearly polarised Laguerre-Gaussian (LG) beams are examined. Such a type of light possesses a substantial longitudinal field when its beam waist is sufficiently small and so gives rise to non-zero chirality and helicity. In the simplest case of a doughnut beam of winding number $\ell=1$ and another identical to it but has $\ell= -1$, we obtain different chirality and helicity distributions at the focal plane $z=0$. We also show that this chiral behaviour persists and the patterns evolve so that on planes at $z<0$ and $z>0$ the beam convergence contributes differently to the changes in the chirality and helicity distributions.
