Singh Keshaan, Buono Wagner Tavares, Forbes Andrew, Dudley Angela
Opt Express. 2021 Jan 18;29(2):2727-2737. doi: 10.1364/OE.411029.
We generate optical fields whose polarization structures not only rotate about their propagation axis but also can be controlled to accelerate independently from their spatial profile. We show that by combining accelerated intensity transport with orthogonal polarization states, we can produce a vector beam that displays optical activity with periodical acceleration and deceleration of the Stokes vector during propagation. We achieve this with orthogonal, scalar fields, represented by weighted superpositions of oppositely charged Bessel beams. In addition to their creation, we show that the Stokes vector can be made to accelerate or decelerate at specific locations along the Poincaré sphere by tailoring the generating basis. We also witness an optical current, or intensity transport, between local positions in the field that corresponds with the occurrence of the state-of-polarization accelerating or decelerating.
我们生成了光场，其偏振结构不仅围绕其传播轴旋转，而且可以被控制以独立于其空间分布进行加速。我们表明，通过将加速的强度传输与正交偏振态相结合，我们可以产生一种矢量光束，该光束在传播过程中显示出斯托克斯矢量具有周期性加速和减速的光学活性。我们通过由带相反电荷的贝塞尔光束的加权叠加表示的正交标量场来实现这一点。除了生成这些光场，我们还表明，通过调整生成基，可以使斯托克斯矢量在沿着庞加莱球的特定位置加速或减速。我们还观察到在与偏振态加速或减速的发生相对应的场中的局部位置之间存在光电流或强度传输。
