AI 中文总结
该研究在表面纳米轴向光子谐振器中实现级联布里渊-克尔微梳产生，通过受激布里渊散射与克尔四波混频结合，生成双梳状光谱，为轴向结构回音壁谐振器研究提供新平台。
AI 中文摘要
表面纳米轴向光子谐振器（SNAPR）提供了一种轴向结构的回音壁模式平台，其中纳米尺度的有效半径变化产生空间局域的光学谐振。在此，我们展示了在由660微米直径二氧化硅光纤制备的SNAPR中实现级联布里渊-克尔微梳的产生。在连续波泵浦下，级联受激布里渊散射产生一阶和二阶斯托克斯场，这些场在腔内引发克尔四波混频。由此产生的非线性光谱包含两个梳状族，其共同方位角间隔为100.2 GHz，相对偏移为9.6 GHz，与二氧化硅中的布里渊频移一致。低功率透射光谱图提供了谐振器的空间分辨模态分析，揭示了负载品质因数约为千万量级的局域谐振，以及与实测布里渊间隔兼容的光学谐振对。这些结果确立了SNAPR作为研究轴向结构回音壁谐振器中级联受激布里渊散射、克尔四波混频和梳状形成的平台。
英文摘要
Surface nanoscale axial photonic resonators (SNAPRs) provide an axially structured whispering-gallery-mode platform in which nanoscale effective-radius variations produce spatially localized optical resonances. Here, we demonstrate cascaded Brillouin-Kerr microcomb generation in a SNAPR fabricated from 660 micrometer diameter silica fiber. Under continuous-wave pumping, cascaded stimulated Brillouin scattering generates first- and second-order Stokes fields that seed Kerr four-wave mixing within the cavity. The resulting nonlinear spectrum contains two comb families with a common azimuthal spacing of 100.2 GHz and a relative offset of 9.6 GHz, consistent with the Brillouin shift in silica. A low-power transmission spectrogram provides a spatially resolved modal analysis of the resonator, revealing localized resonances with loaded quality factors on the order of ten million, and optical resonance pairs compatible with the measured Brillouin spacing. These results establish SNAPRs as a platform for studying cascaded stimulated Brillouin scattering, Kerr four-wave mixing, and comb formation in axially structured whispering gallery resonators.
Comments7 pages, 5 figures; Supplemental Material: 3 pages, 1 figure
