Terahertz Dielectric Property Characterization of Photopolymers for Additive Manufacturing
Terahertz Dielectric Property Characterization of Photopolymers for Additive Manufacturing
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DOI：
10.1109/access.2019.2893196
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发表时间：
2019-01
期刊：
影响因子：
3.9
通讯作者：
Nattapong Duangrit;B. Hong;A. Burnett;P. Akkaraekthalin;I. Robertson;N. Somjit
中科院分区：
文献类型：
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作者：
Nattapong Duangrit;B. Hong;A. Burnett;P. Akkaraekthalin;I. Robertson;N. Somjit
在本文中，用于立体光刻、数字光处理（DLP）和聚合物喷射增材制造技术的树脂基可光固化聚合物材料在0.2至1.4太赫兹（THz）范围内表征其综合介电性能，例如，折射率，吸收系数，介电常数和损耗角正切，通过使用基于激光的太赫兹时域光谱。总共选择了14种光固化3D打印聚合物，因为它们在打印分辨率，材料特性等方面适用于毫米波（mm波）和THz应用。从0.2到1.4THz的测量结果，所有测试下的光聚合物样品的介电常数在2.00-3.10之间，而损耗角正切在0.008到0.102之间，这对于许多应用是非常有用的，例如，3D打印天线和THz传输线，通过DLP微制造技术使用HTM 140-V2光聚合物微制造的渐进准单模布拉格光纤进行演示，该光纤先前在0.246至0.276 THz的标称频率下报道。
In this paper, resin-based photocurable polymer materials for stereolithography, digital-light-processing (DLP), and polymer-jetting additive manufacturing techniques were characterized from 0.2 to 1.4 terahertz (THz) for their comprehensive dielectric properties, e.g., refractive index, absorption coefficient, dielectric constant, and loss tangent, by using laser-based THz time-domain spectroscopy. A total of 14 photocurable 3D-printing polymers were chosen, owing to their suitability, in terms of printing resolution, material characteristics, and so on, for millimeter-wave (mm-wave) and THz applications. The measurement results from 0.2 to 1.4THz, the dielectric constants of all photopolymer samples under test are between 2.00-3.10, while the loss tangents are from 0.008 to 0.102, which are quite useful for many applications, e.g., 3D printed antennas and THz transmission lines, which were demonstrated by an asymptotically quasi-single-mode Bragg fiber microfabricated by DLP micromanufacturing technique using HTM140-V2 photopolymer, which is previously reported at the nominal frequencies from 0.246 to 0.276 THz.