Coherent suppression of backscattering in optical microresonators.
Coherent suppression of backscattering in optical microresonators.
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DOI：
10.1038/s41377-020-00440-2
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发表时间：
2020-12-23
期刊：
影响因子：
--
通讯作者：
Del'Haye P
中科院分区：
文献类型：
--
作者：
Svela AØ;Silver JM;Del Bino L;Zhang S;Woodley MTM;Vanner MR;Del'Haye P
当光沿着波导传播时，一部分场可以被瑞利散射体反射。在高品质因数回音廊模式微谐振器中，这种本征后向散射主要是由表面或体材料缺陷引起的。对于几种类型的基于微谐振器的实验和应用，腔内最小的后向散射是至关重要的，因此，抑制后向散射的能力是必不可少的。我们证明，在高品质因数微谐振器的近场中引入一个额外的散射体，可以相干地抑制微谐振器中的后向散射量超过30 分贝。该方法依赖于控制散射体的位置，使得本征和散射体诱导的反向传播场破坏性地干涉。这项技术在微谐振器应用中很有用，在这种应用中，后向散射目前限制了器件的性能，如环形激光陀螺仪和双频梳子，这两种器件都受到注入锁定的影响。此外，这些发现对集成光子电路很有意义，在这些电路中，背向反射可能会对激光光源或其他组件的稳定性产生负面影响。一种抑制光学回音廊模式(WGM)微谐振器后向散射的技术显著提高了它们的性能，为它们在各种应用的光子器件中的应用打开了大门。微谐振器表面或主体材料中的缺陷会导致一部分光向后散射到反向传播的WGM中，从而限制了它们的性能。由德国马克斯·普朗克光科学研究所的帕斯卡尔·德尔海伊领导的一组研究人员现在已经展示了一种可以将后向散射抑制30分贝以上的技术。通过在高质量因子的WGM微谐振器的近场引入一个额外的散射体，研究人员可以控制散射体的位置，从而使本征和散射诱导的反向传播场产生破坏性干扰。这项技术可以用于需要最小后向散射的光子设备，如激光陀螺仪和双频梳子。
As light propagates along a waveguide, a fraction of the field can be reflected by Rayleigh scatterers. In high-quality-factor whispering-gallery-mode microresonators, this intrinsic backscattering is primarily caused by either surface or bulk material imperfections. For several types of microresonator-based experiments and applications, minimal backscattering in the cavity is of critical importance, and thus, the ability to suppress backscattering is essential. We demonstrate that the introduction of an additional scatterer into the near field of a high-quality-factor microresonator can coherently suppress the amount of backscattering in the microresonator by more than 30 dB. The method relies on controlling the scatterer position such that the intrinsic and scatterer-induced backpropagating fields destructively interfere. This technique is useful in microresonator applications where backscattering is currently limiting the performance of devices, such as ring-laser gyroscopes and dual frequency combs, which both suffer from injection locking. Moreover, these findings are of interest for integrated photonic circuits in which back reflections could negatively impact the stability of laser sources or other components. A technique that suppresses backscattering in optical whispering-gallery-mode (WGM) microresonators significantly improves their performance, opening the door for their use in photonic devices for various applications. Imperfections in the microresonator surface or bulk material can cause backscattering of a portion of the light into the counterpropagating WGM, limiting their performance. A team of researchers led by Pascal Del’Haye from the Max Planck Institute for the Science of Light in Germany have now demonstrated a technique that can suppress backscatter by more than 30 decibels. By introducing an additional scatterer in the near-field of a high-quality-factor WGM microresonator, the researchers could control the scatterer’s position so that the intrinsic and scatter-induced backpropagating fields interfere destructively. The technique could be used for photonic devices in which minimal backscattering is essential, such as laser gyroscopes and dual-frequency combs.
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影响因子：
8.6
作者：
Fuerst, J. U.;Strekalov, D. V.;Leuchs, G.
通讯作者：
Leuchs, G.
影响因子：
44.1
作者：
Aspelmeyer, Markus;Kippenberg, Tobias J.;Marquardt, Florian
通讯作者：
Marquardt, Florian
影响因子：
64.8
作者：
Marin-Palomo, Pablo;Kemal, Juned N.;Koos, Christian
通讯作者：
Koos, Christian
影响因子：
4
作者：
Del'Haye, Pascal;Diddams, Scott A.;Papp, Scott B.
通讯作者：
Papp, Scott B.
DOI：
10.2971/jeos.2014.14013
发表时间：
2014-01-01
影响因子：
1.5
作者：
Dell'Olio, F.;Tatoli, T.;Armenise, M. N.
通讯作者：
Armenise, M. N.