Non-collinear interaction of photons with orbital angular momentum.
Non-collinear interaction of photons with orbital angular momentum.
复制标题
DOI：
10.1038/srep03491
复制
发表时间：
2013-12-13
影响因子：
4.6
通讯作者：
Faccio, Daniele
中科院分区：
文献类型：
--
作者：
Roger, Thomas;Heitz, Julius J. F.;Wright, Ewan M.;Faccio, Daniele
研究了两束带轨道角动量的非共线光束之间的非线性相互作用。更具体地说，两个入射光束在具有二阶非线性的介质中以一定角度相互作用，从而在二次谐波频率上产生第三个非共线光束，与基于传统相位匹配理论的预期相比，其转换效率降低。与之前的螺旋带宽计算不同，这种减少是由于输入波束OAM沿非共线相互作用方向投影的几何效应。即使在较小的相互作用角度下，这种效应也是相关的，而在较大的相互作用角度下，由于非线性相互作用中总OAM的不守恒，这种效应变得更加复杂。在不同条件下进行了实验，结果与理论非常吻合。我们的结果超出了这里研究的二次谐波产生的具体情况，特别是对于光子的参数下转换或具有不同OAM的光束之间的相位匹配非共线相互作用。
We study the nonlinear interaction between two non-collinear light beams that carry orbital angular momentum (OAM). More specifically, two incident beams interact at an angle in a medium with a second order nonlinearity and thus generate a third, non-collinear beam at the second harmonic frequency that experiences a reduced conversion efficiency in comparison to that expected based on conventional phase-matching theory. This reduction scales with the input beam OAM and, differently from previous spiral bandwidth calculations, is due to a geometric effect whereby the input OAM is projected along the non-collinear interaction direction. The effect is relevant even at small interaction angles and is further complicated at large angles by a non-conservation of the total OAM in the nonlinear interaction. Experiments are performed under different conditions and are in excellent agreement with the theory. Our results have implications beyond the specific case studied here of second-harmonic generation, in particular for parametric down-conversion of photons or in general for phase-matched non-collinear interactions between beams with different OAM.
登录
查看更多内容
影响因子：
2.9
作者：
Courtial, J;Dholakia, K;Padgett, MJ
通讯作者：
Padgett, MJ
影响因子：
2.9
作者：
Miatto, Filippo M.;Yao, Alison M.;Barnett, Stephen M.
通讯作者：
Barnett, Stephen M.
影响因子：
2.4
作者：
Molina-Terriza, G;Torres, JP;Torner, L
通讯作者：
Torner, L
影响因子：
8.6
作者：
Gatti, A.;Brambilla, E.;Lugiato, L. A.
通讯作者：
Lugiato, L. A.
DOI：
10.1364/josab.28.002806
发表时间：
2011-11-01
影响因子：
1.9
作者：
Bovino, Fabio Antonio;Braccini, Matteo;Sibilia, Concita
通讯作者：
Sibilia, Concita