Institute for Integrative Nanosciences, Leibniz-Institut für Festkörper-und Werkstoffforschung Dresden, Helmholtzstrasse 20, D-01069 Dresden, Germany.
Opt Lett. 2011 Oct 1;36(19):3840-2. doi: 10.1364/OL.36.003840.
We tune optical resonances in rolled-up SiO/SiO(2) microtube cavities by gradually modifying the tube structure through asymmetrical postdeposition of SiO(2). Spectral blueshifts followed by redshifts of the resonant modes are observed in a thin-walled microtube (tube-I), which is attributed to a competition between shape deformation and effective increase of tube wall thickness. In contrast, only a monotonic redshift is detected when asymmetrical deposition is performed on a thick-walled microtube (tube-II). Distinct wavelength-dependent tuning was revealed in both kinds of tubes. Numerical calculations based on perturbation theory are carried out to explain and confirm the experimental results.
我们通过在卷起的 SiO/SiO(2) 微管腔中逐渐修改管结构来调谐光学共振，通过 SiO(2) 的非对称后沉积。在薄壁微管（管-I）中观察到共振模式的光谱蓝移随后红移，这归因于形状变形和管壁厚的有效增加之间的竞争。相比之下，当在厚壁微管（管-II）上进行非对称沉积时，仅检测到单调的红移。在这两种类型的管中都揭示了明显的波长相关调谐。基于微扰理论的数值计算被用来解释和证实实验结果。
