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Mechanical tuning of defect modes in polymer-based terahertz one-dimensional photonic crystals fabricated by stereolithography
Optical Engineering ( IF 1.3 ) Pub Date : 2021-11-01 , DOI: 10.1117/1.oe.60.11.117104
Serang Park 1 , V. Paige Stinson 1 , Micheal McLamb 1 , Glenn D. Boreman 1 , Tino Hofmann 1
Affiliation  

Mechanical tuning of defect modes in a polymer-based one-dimensional photonic crystal was demonstrated for the terahertz (THz) spectral range. A sharp defect mode in the photonic bandgap was achieved by symmetrically enclosing a defect layer with two identical pairs of alternating compact and low-density layers. By adjusting the thickness of the defect layer, the spectral position of the defect mode within the photonic bandgap was easily controlled. Normal incidence transmission spectroscopy in a spectral range from 82 to 125 GHz was used to determine the THz spectral response for different defect layer thicknesses. The transmission data were analyzed using stratified optical layer model calculations. Spectral shift of the center frequency of the narrow transmission peak within a distinct photonic bandgap was observed in the experimental transmission spectra. The shift was achieved by mechanical tuning of the defect layer thickness. A good agreement between the relevant model parameters and the corresponding design parameters was found.

中文翻译:

立体光刻法制备的聚合物基太赫兹一维光子晶体中缺陷模式的机械调谐

在太赫兹 (THz) 光谱范围内展示了基于聚合物的一维光子晶体中缺陷模式的机械调谐。光子带隙中的尖锐缺陷模式是通过用两对相同的交替致密层和低密度层对称地包围缺陷层来实现的。通过调整缺陷层的厚度,可以轻松控制光子带隙内缺陷模式的光谱位置。82 至 125 GHz 光谱范围内的法向入射透射光谱用于确定不同缺陷层厚度的太赫兹光谱响应。使用分层光学层模型计算分析传输数据。在实验透射光谱中观察到在明显光子带隙内窄透射峰的中心频率的光谱偏移。这种转变是通过机械调整缺陷层厚度来实现的。发现相关模型参数与相应的设计参数之间具有良好的一致性。
更新日期:2021-11-20
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