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arXiv 2304.04764physics.optics
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通过三维倏逝场耦合产生新型光学自旋与手性

Emerging optical spin and chirality by 3D evanescent field coupling

Liang Fang, Jian Wang

AI总结:

本文提出利用强约束波导的三维倏逝耦合产生光学自旋与手性,其源于耦合模式间π/2相位延迟,并表现为侧边锁定和路径锁定现象,为片上手性光-物质相互作用开辟新途径。

摘要:

光学自旋与手性在调控光子发射和光-物质相互作用中起着关键作用。本文中,我们展示了强约束波导对导模的三维倏逝耦合可以外在地产生光学自旋与手性。这些新出现的光学量本质上来源于两个耦合模式之间π/2的内禀相位延迟。对于具有2×2输入端口的定向耦合器,所产生的光学自旋和手性分别固有地表现为侧边锁定和路径锁定现象。我们通过数值模拟证明,这些光学自旋和手性可以普遍地通过高阶模式耦合以及其他结构波导产生。光学波导中的这些新物理量可能为利用近场光子自旋和片上手性光-物质相互作用开辟道路。

英文摘要:

Optical spin and chirality play key roles in engineering photonic emission and light-matter interactions. Here we show that 3D evanescent coupling of guided modes by strongly confined waveguides can extrinsically produce optical spin and chirality. These emerging optical quantities are essentially derived from an intrinsic phase retardation of π/2 between two coupled modes. For a directional coupler with 2*2 input ports, the produced optical spin and chirality are inherently characterized by the side-locked and path-locked phenomena, respectively. We numerically demonstrate that these optical spin and chirality can be ubiquitously produced by higher-order mode coupling and other structural waveguides. These new quantities in optical waveguides may pave the way to exploit near-field photonic spin and on-chip chiral light-matter interactions.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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