Bolaños Quiñones Vladimir A, Huang Gaoshan, Plumhof Johannes D, Kiravittaya Suwit, Rastelli Armando, Mei Yongfeng, Schmidt Oliver G
Institute for Integrative Nanosciences, IFW Dresden, Helmholtzstrasse 20, 01069 Dresden, Germany.
Opt Lett. 2009 Aug 1;34(15):2345-7. doi: 10.1364/ol.34.002345.
We present experimental and finite-difference time-domain simulation results on the tunability of optical resonant modes of spiral microtube cavities, rolled-up from square patterned SiO/SiO(2) thin nanomembranes on glass substrates. The peak positions of resonant TM modes shift to lower energies by coating the microtube wall with Al(2)O(3) monolayers, which is well described by simulations. Moreover, a second group of tunable resonant modes appears beyond a certain critical thickness of the coated Al(2)O(3). The polarization of this group of modes is TE, as we find out by a detailed analysis of the polarization-dependent photoluminescence spectra.
我们展示了关于螺旋微管腔光学共振模式可调谐性的实验和时域有限差分模拟结果，该螺旋微管腔由玻璃衬底上的方形图案化SiO/SiO₂ 薄纳米膜卷绕而成。通过用Al₂O₃ 单层覆盖微管壁，共振TM模式的峰值位置向更低能量移动，这在模拟中得到了很好的描述。此外，在涂覆的Al₂O₃ 的特定临界厚度以上出现了第二组可调谐共振模式。通过对偏振相关光致发光光谱的详细分析，我们发现这组模式的偏振是TE。
