角动量
物理
光的轨道角动量
角动量耦合
总角动量
光的角动量
角动量算符
方位量子数
非线性系统
相位匹配
匹配(统计)
光学
准相位匹配
相(物质)
经典力学
计算物理学
非线性光学
量子力学
激光器
数学
统计
作者
Yan Chen,Rui Ni,Yaodong Wu,Li Du,Xiaopeng Hu,Dunzhao Wei,Yong Zhang,Shining Zhu
标识
DOI:10.1103/physrevlett.125.143901
摘要
Nonlinear interactions between light waves can exchange energy, linear momentum, and angular momentum. The direction of energy flow between frequency components is usually determined by the conventional phase-matching condition related to the linear momentum. However, the transfer law of orbital angular momentum (OAM) during frequency conversion remains to be elucidated. Here, we demonstrate experimentally that OAM transfer depends strongly on the phase-matching condition defined by both linear and orbital angular momenta. Under different phase-matching configurations, the second-harmonic wave exhibits variable OAM spectral characteristics such as the presence of just a single value or of odd orders only. Our results pave the way toward unveiling the underlying mechanism of nonlinear conversion of OAM states.
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