Figures and source data for the paper '0.2 - 1.4-THz Dielectric Property Characterization of Photopolymers for Additive Manufacturing': In this paper, resin-based photocurable polymer materials for stereolithography (SLA), digital-light-processing (DLP) and polymer-jetting (PolyJet) additive manufacturing techniques were characterized from 0.2 - 1.4 terahertz (THz) for their comprehensive dielectric properties, e.g. reflective index, absorption coefficient, dielectric constant and loss tangent, by using laser-based time-domain spectroscopy (TDS). Fourteen photocurable 3D-printing polymers were chosen due to their suitability, in terms of printing resolution, material characteristics and etc., for millimeter-wave (mm-wave) and THz applications. The propagation loss mechanism and other electrical/optical properties of the chosen photopolymers for terahertz radiation were determined by correlating absorption coefficients and loss tangents obtained from the measurements. To demonstrate the utilization of the selected photopolymers at THz spectrum, an asymptotically quasi-single-mode Bragg fiber microfabricated by DLP micromanufacturing technique using HTM140-V2 photopolymer was prototyped and characterized at the nominal frequencies from 0.246 to 0.276 THz. The measurement results show that the average propagation loss of the asymptotically single-mode THz Bragg fiber is less than 5dB/m for the whole band, which is the lowest propagation loss reported to date for asymptotically single-mode all-dielectric fiber at this frequency band.

These data and figures relate to the study of investigation of Electromagnetic Mode Transition and Filtering of an Asymptotically Single-mode Hollow THz Bragg Fibre. They include the original figures to form the associated paper and the original data for figures 1, 4, 7, 8 and 9.

This paper presents, for the first time, a multimodal sensor for characterizing relative permittivity of plastic polymers by integrating in a single sensor (1) frequency-reconfigurable resonance technique at 98 and 100 GHz, and (2) 80-100-GHz broadband modified transmission-line technique. The sensor is designed based on a custom-made WR-10 waveguide featuring dual rectangular Complementary Split-Ring Resonators (CSRRs). By loading the CSRRs with a Material-Under-Test (MUT), the reflected and transmitted electromagnetic waves propagating inside the waveguide are changed depending on the dielectric properties of the material. Various plastic polymer materials, e.g. Polytetrafluoroethylene (PTFE), Polymethylmethacrylate (PMMA) and High-Density Polyethylene (HDPE), are characterized. The sensor in this paper offers various key advantages over any state-of-the-art material characterization techniques at millimeter-wave frequencies, e.g. multiple characterization techniques integrated in a single device, miniaturization, much higher tolerance to changes in the measurement environment, ease of design and fabrication, and better cost effectiveness.

These data relate to the study of low-loss asymptotically single-Mode THz Bragg fiber fabricated by digital light processing rapid prototyping. They include the characterization of 3D printing material, namely HTM140. The data associated with the analytical analysis on the dispersion curves, propagation loss and the group velocity dispersion are also included. The numerical simulation results on the impact of support bridges on the propagation loss are archived. Finally, they also archive the measurement results of the transmission coefficients of the fabricated Bragg fibres and consequently the measured propagation loss.

These data relate to a design study of an asymptotically single-mode small-core terahertz Bragg fibre with low loss and low dispersion. A generalized half-wavelength condition, promoting the manipulation of photonic bandgap for Bragg fibre, is proposed and examined by representative cases. A significant propagation loss discrimination between the desired TE01 mode and other unwanted competing modes has been created resulting in an effectively single-mode operation in the fibre. The proposed tightly confined single-TE01-mode small-air-core Bragg fibre exhibits propagation loss and group velocity dispersion less than 1.2 dB/m and -0.6 ps/THz/cm, respectively, over the frequency range from 0.85 THz to 1.15 THz.