On-chip spin-orbit locking of quantum emitters in 2D materials for chiral emission
On-chip spin-orbit locking of quantum emitters in 2D materials for chiral emission
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DOI：
10.1364/optica.463481
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发表时间：
2022-08-20
期刊：
影响因子：
10.4
通讯作者：
Strauf, Stefan
中科院分区：
文献类型：
--
作者：
Ma, Yichen;Zhao, Haoqi;Strauf, Stefan
光携带自旋角动量（SAM）和轨道角动量（OAM），它们可以作为量子信息处理的潜在自由度。量子发射器是片上控制和操纵整个SAM-OAM状态空间的理想候选者。在这里，我们展示了自旋极化量子发射体在单层WSe 2中与Si 3 N4环形谐振器的回音壁模式的耦合。腔模在倏逝区中携带sigma = +/-1的横向SAM，其中符号取决于光的轨道功率流方向。通过剪裁腔-发射极相互作用，将量子发射极的本征自旋态耦合到SAM和腔模的传播方向上，导致自旋轨道锁定和随后的手征单光子发射。此外，通过设计光如何从WGM散射，我们创建了一个高阶贝塞尔光束，这开辟了产生携带OAM状态的光学涡旋的可能性。(C)2022 Optica出版集团根据Optica开放获取出版协议的条款
Light carries both spin angular momentum (SAM) and orbital angular momentum (OAM), which can be used as potential degrees of freedom for quantum information processing. Quantum emitters are ideal candidates towards on-chip control and manipulation of the full SAM-OAM state space. Here, we show coupling of a spin-polarized quantum emitter in a monolayer WSe2 with the whispering gallery mode of a Si3N4 ring resonator. The cavity mode carries a transverse SAM of sigma = +/- 1 in the evanescent regions, with the sign depending on the orbital power flow direction of the light. By tailoring the cavity-emitter interaction, we couple the intrinsic spin state of the quantum emitter to the SAM and propagation direction of the cavity mode, which leads to spin-orbit locking and subsequent chiral single-photon emission. Furthermore, by engineering how light is scattered from the WGM, we create a high-order Bessel beam which opens up the possibility to generate optical vortex carrying OAM states. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement