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arXiv 2008.03010physics.opticsquant-ph
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频率空间中声子诱导反常规范势的光子隔离

Phonon-induced anomalous gauge potential for photonic isolation in frequency space

Jianfan Yang, Luqi Yuan, Tian Qin, Fangxing Zhang, Yao Chen, Xiaoshun Jiang, Xianfeng Chen, Shanhui Fan, Wenjie Wan

摘要:

光子规范势对于操纵电荷中性光子(就像它们在电磁场中的对应电子一样)至关重要,允许光子学中的类似Aharonov-Bohm效应,并为光子隔离等关键应用铺平道路。通常,规范势沿两条相反的传播路径呈现相位反转。在这里,我们实验证明声子诱导的异常规范位与非反转的规范相位在空间频率空间,准相位匹配的非线性布里渊散射,使这种独特的方向相关的规范相位。基于此方案,我们构建光子隔离器在频域允许沿频率轴的非互易传播的光,在光子隔离器中的相干相位控制允许完全切换通过Aharonov-Bohm干涉仪的方向性。此外,还示出了类似的相干控制的单向频率转换。这些结果可以提供一个独特的平台,一个紧凑的,集成的解决方案,实现合成尺寸的芯片上的光信号处理设备。

英文摘要:

Photonic gauge potentials are crucial for manipulating charge-neutral photons like their counterpart electrons in the electromagnetic field, allowing analogous Aharonov-Bohm effect in photonics and paving the way for critical applications like photonic isolation. Normally, a gauge potential exhibits phase inversion along two opposite propagation paths. Here we experimentally demonstrate phonon-induced anomalous gauge potentials with non-inverted gauge phases in a spatial-frequency space, where quasi-phase-matched nonlinear Brillouin scatterings enable such unique direction-dependent gauge phases. Based on this scheme, we construct photonic isolators in the frequency domain permitting nonreciprocal propagation of light along the frequency axis, where coherent phase control in the photonic isolator allows switching completely the directionality through an Aharonov-Bohm interferometer. Moreover, similar coherent controlled unidirectional frequency conversions are also illustrated. These results may offer a unique platform for a compact, integrated solution to implement synthetic-dimension devices for on-chip optical signal processing.

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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