Tunable topological charge vortex microlaser
Tunable topological charge vortex microlaser
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DOI：
10.1126/science.aba8996
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发表时间：
2020-05
期刊：
影响因子：
56.9
通讯作者：
Zhifeng Zhang;Xingdu Qiao;B. Midya;Kevin Liu;Jingbo Sun;Tianwei Wu;Wenjing Liu;R. Agarwal
中科院分区：
文献类型：
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作者：
Zhifeng Zhang;Xingdu Qiao;B. Midya;Kevin Liu;Jingbo Sun;Tianwei Wu;Wenjing Liu;R. Agarwal
按需光涡旋具有多个自由度(波长、偏振、脉冲长度等)，可用于编码信息。光束或脉冲也可以被构造成具有轨道角动量的属性，从而成为涡旋。由于旋涡的缠绕数可以是任意的，因此可以显著地扩大通道容量。张某等人。和纪万昌等人。开发了基于纳米光子学的方法来产生和电检测具有任意轨道角动量的光，这一目标到目前为止仍然是一个突出的挑战(见GE的透视)。纳米光子平台为开发大容量光学芯片提供了一条途径。科学，这一期，第760页，第763页；另见第707页纳米光子器件产生并电探测携带任意光学角动量的光学涡旋。涡旋光束本身携带的轨道角动量(OAM)为多维大容量数据多路传输提供了可能，满足了日益增长的信息需求。研制可动态调谐的OAM光源是实现OAM调制和复接的关键步骤。通过利用总动量守恒、自旋-轨道相互作用和光学非厄米对称破缺的性质，我们展示了一种OAM可调谐的涡旋微激光器，在单个电信波长提供了可变拓扑电荷的手征光态。非厄米控制的室温手性光发射方案可以进一步放大，以灵活的方式同时进行多涡旋发射。我们的工作为下一代多维OAM-自旋波分复用技术的发展提供了一条途径。
Optical vortices on demand Light has several degrees of freedom (wavelength, polarization, pulse length, and so on) that can be used to encode information. A light beam or pulse can also be structured to have the property of orbital angular momentum, becoming a vortex. Because the winding number of the vortex can be arbitrary, the channel capacity can be expanded considerably. Zhang et al. and Ji et al. developed nanophotonic-based methods for generating and electrically detecting light with arbitrary orbital angular momentum, a goal that has remained an outstanding challenge so far (see the Perspective by Ge). The nanophotonic platform provides a route for developing high-capacity optical chips. Science, this issue p. 760, p. 763; see also p. 707 Nanophotonic devices generate and electrically detect optical vortices carrying arbitrary optical angular momentum. The orbital angular momentum (OAM) intrinsically carried by vortex light beams holds a promise for multidimensional high-capacity data multiplexing, meeting the ever-increasing demands for information. Development of a dynamically tunable OAM light source is a critical step in the realization of OAM modulation and multiplexing. By harnessing the properties of total momentum conservation, spin-orbit interaction, and optical non-Hermitian symmetry breaking, we demonstrate an OAM-tunable vortex microlaser, providing chiral light states of variable topological charges at a single telecommunication wavelength. The scheme of the non–Hermitian-controlled chiral light emission at room temperature can be further scaled up for simultaneous multivortex emissions in a flexible manner. Our work provides a route for the development of the next generation of multidimensional OAM-spin-wavelength division multiplexing technology.