Second-harmonic generation of spatiotemporal optical vortices and conservation of orbital angular momentum
Second-harmonic generation of spatiotemporal optical vortices and conservation of orbital angular momentum
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DOI：
10.1364/optica.422743
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发表时间：
2021-05-20
期刊：
影响因子：
10.4
通讯作者：
Milchberg, H. M.
中科院分区：
文献类型：
--
作者：
Hancock, S. W.;Zahedpour, S.;Milchberg, H. M.
时空光学涡旋(STOV)是一种固有的光学轨道角动量(OAM)结构，其中OAM矢量与传播方向[Optica 6,1547(2019)]垂直，光学相位在时空中循环。在这里，我们从实验和理论上证明了STOV脉冲的二次谐波的产生以及基于STOV的OAM的守恒性。我们的实验验证了光子可以具有与其传播方向垂直的内禀轨道角动量。(C)OSA开放获取出版协议条款下的2021年美国光学学会
A spatiotemporal optical vortex (STOV) is an intrinsic optical orbital angular momentum (OAM) structure in which the OAM vector is orthogonal to the propagation direction [Optica 6, 1547 (2019)] and the optical phase circulates in space-time. Here, we experimentally and theoretically demonstrate the generation of the second harmonic of a STOV-carrying pulse along with the conservation of STOV-based OAM. Our experiments verify that photons can have intrinsic orbital angular momentum perpendicular to their propagation direction. (C) 2021 Optical Society of America under the terms of the OSA Open Access Publishing Agreement