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arXiv 2203.01200physics.optics
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微腔精细结构的观察

Observation of microcavity fine structure

C. Koks, F. B. Baalbergen, M. P. van Exter

摘要:

我们在光学微腔的共振谱中观察到精细结构。我们确定的偏振分辨模式的光谱,并发现共振频率分裂按照理论预测。观察到的精细结构主要是由光学自旋轨道耦合和非傍轴传播和反射引起的。这两种效应都是固有的,即存在于理想的旋转对称系统中,并且与反射镜的曲率曲率半径成反比。对于具有小曲率半径的腔,精细结构对谐振谱的影响是重要的且不可避免的,因此应予以考虑。

英文摘要:

We observe fine structure in the resonance spectra of optical microcavities. We identify the polarization-resolved modes in the spectrum and find that resonance frequencies split in accordance with the theoretical prediction. The observed fine structure is dominantly caused by an optical spin-orbit coupling and non-paraxial propagation and reflection. Both effects are intrinsic, i.e. present in an ideal rotation-symmetric system, and scale inversely proportional to the mirror radius of curvature. For cavities with a small radius of curvature, the influence of fine structure on the resonance spectrum is important and unavoidable and should thus be taken into account.

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