Microsphere-assisted Fabry–Perot interferometry: proof of concept

作者：Weicheng Wang, Chunlei Jiang, Shaopeng Tian, Peng Chen, Kaichuan Xu, Hao Wu, Lun Yan, Yan Lu · 发表于：Applied Optics · 年份：2022 · DOI：10.1364/ao.455341 · 被引用次数：6 · 研究领域：Near-Field Optical Microscopy、Photonic and Optical Devices、Force Microscopy Techniques and Applications

We propose a microsphere-assisted Fabry-Perot interferometry (MAFPI) for microstructure measurement. We stretch the single-mode fiber and combine it with microspheres of different sizes and refractive indices, which can form super-focused spots with different characteristics, that is, a photonic nanojet phenomenon. As a proof of principle, we performed scanning imaging of optical discs and holographic gratings by MAFPI. The optical disc image obtained by MAFPI is consistent with the result obtained by a scanning electron microscope, and the obtained grating image is consistent with the actual result.