Polarization-dependent refractive index analysis for nanoporous microcavities by ray tracing of a propagating electromagnetic field
Polarization-dependent refractive index analysis for nanoporous microcavities by ray tracing of a propagating electromagnetic field
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DOI：
10.1364/ome.434394
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发表时间：
2021-09
影响因子：
2.8
通讯作者：
Yuya Mikami;H. Yoshioka;Nasim Obata;Sangmin Han;Y. Oki
中科院分区：
文献类型：
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作者：
Yuya Mikami;H. Yoshioka;Nasim Obata;Sangmin Han;Y. Oki
在这项研究中，我们展示了一种新的混合模拟方法，该方法结合了电磁场分析和基于波动光学和光线光学的光线跟踪，能够准确地估计纳米孔结构中的折射率。通过对有效介质近似(EMA)和屏蔽效应的模拟，并考虑了偏振相关性，建立了一个新的纳米孔结构折射率的理论模型。然后对二氧化硅纳米颗粒聚集体的光学性质进行了实验评估。根据测量的性质，纳米颗粒被预测为对光学腔具有足够的透明度。用激光染料制作了纳米多孔微盘激光器，证明了纳米多孔微盘具有激光能力。该微盘充分发挥了光学腔体的作用，具有良好的匹配特性。本研究通过数值模拟和实验相结合的方法，为估算纳米多孔材料的折射率提供了一种新的偏振相关观点。
In this study, we demonstrated an accurate estimation of the refractive index in nanoporous structures using a novel hybrid simulation method that combines electromagnetic field analysis and ray tracing based on wave optics and ray optics. A novel theoretical model for the refractive index in a nanoporous structure was developed using a simulation of the effective medium approximation (EMA) and screening effect with consideration of polarization dependence. The optical properties were then experimentally evaluated on aggregates of silica nanoparticles. Based on the measured properties, nanoparticles were predicted to have sufficient transparency for the optical cavity. A nanoporous microdisk laser was thus fabricated with laser dye to demonstrate that the nanoporous microdisk was capable of lasing. The microdisk functioned sufficiently as an optical cavity and had well-matched characteristics. This study provides a novel viewpoint of polarization dependence to estimate the refractive index of nanoporous materials by combining numerical simulations and experiments.