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3-D Spiraling Self-Trapped Light Beams in Photochemical Systems
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2019-09-23 , DOI: 10.1021/acs.jpclett.9b02302 Derek R. Morim 1 , Damian Bevern 1 , Ignacio Vargas-Baca 1 , Kalaichelvi Saravanamuttu 1
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2019-09-23 , DOI: 10.1021/acs.jpclett.9b02302 Derek R. Morim 1 , Damian Bevern 1 , Ignacio Vargas-Baca 1 , Kalaichelvi Saravanamuttu 1
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A pair of visible laser beams self-trap and spiral about each other as they propagate through polymer gels undergoing two different photochemical reactions. When launched into gels that undergo photopolymerization of methacrylate substituents or photo-oxidation of iodide anion, two non-coplanar (skewed) Gaussian beams collide and spiral about each other as they advance through the evolving medium. In the absence of chemical reactions, the linearly polarized beams broaden naturally and propagate along their original, straight-pathed trajectories. By contrast, refractive index gradients generated by the photochemical reactions elicit self-trapping and introduce an attractive interaction between the self-trapped beams. The self-trapped beams spiral about each other when this mutual attraction perfectly counterbalances their original tendency to diverge away from each other. These findings show that the photochemically mediated interactions of incident optical fields within the gel medium impart a helical trajectory and angular velocity to the self-trapped beam pair.
中文翻译：
光化学系统中的3D螺旋自陷光束
一对可见激光束在穿过两种不同光化学反应的聚合物凝胶中传播时会彼此自陷并成螺旋形。当被注入到发生甲基丙烯酸酯取代基的光聚合或碘化物阴离子的光氧化的凝胶中时，两个非共面（偏斜）的高斯光束在前进通过不断发展的介质时会相互碰撞并成螺旋形旋转。在没有化学反应的情况下，线性偏振光束会自然展宽并沿着其原始的直线轨迹传播。相反，由光化学反应产生的折射率梯度引起自陷并在自陷束之间引入有吸引力的相互作用。当这种相互吸引完全抵消了它们彼此分开的原始趋势时，自陷束彼此绕成螺旋状。这些发现表明，在凝胶介质内入射光场的光化学介导的相互作用赋予自捕获束对以螺旋轨迹和角速度。
更新日期：2019-09-23
中文翻译：
光化学系统中的3D螺旋自陷光束
一对可见激光束在穿过两种不同光化学反应的聚合物凝胶中传播时会彼此自陷并成螺旋形。当被注入到发生甲基丙烯酸酯取代基的光聚合或碘化物阴离子的光氧化的凝胶中时，两个非共面（偏斜）的高斯光束在前进通过不断发展的介质时会相互碰撞并成螺旋形旋转。在没有化学反应的情况下，线性偏振光束会自然展宽并沿着其原始的直线轨迹传播。相反，由光化学反应产生的折射率梯度引起自陷并在自陷束之间引入有吸引力的相互作用。当这种相互吸引完全抵消了它们彼此分开的原始趋势时，自陷束彼此绕成螺旋状。这些发现表明，在凝胶介质内入射光场的光化学介导的相互作用赋予自捕获束对以螺旋轨迹和角速度。
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