Terahertz characterisations and analyses of additive manufacturing materials and structures
department or school: Applied Science, Faculty of
department or school: Engineering, School of (Okanagan)
data provider: DSpace
degree campus: UBCO
creator: Brodie, C. Harrison
issued: 2024-08-27T15:14:16Z
issued: 2024
related degree: Doctor of Philosophy - PhD
degree grantor: University of British Columbia
description: Assembly of free-space terahertz (THz) research instrumentation systems necessitate the use of application specific THz compatible optical components. The development, procurement, and expense of THz compatible optical components can be prohibitive for research stakeholders. Commercial three-dimensional (3D) printing (i.e., additive manufacturing) systems are investigated in this thesis, with regard to filament material selection and component fabrication, to address the accessibility of THz compatible optical components. The availability of emerging 3D printing filament materials increases year over year, prompting a need for literature to keep abreast with material characterisations of absorptive and refractive properties over the THz regime. This literature gap is rectified via a consolidative and comprehensive THz time-domain spectroscopy measurement study performed on twenty-four 3D printing filament materials. Optimal filament materials selected for use in THz compatible optical components are identified, being high impact polystyrene (HIPS) and cyclic olefin copolymer (COC), and are demonstrated as 3D printed THz Bragg structures (interference filters). The potential frequency-domain performance and tuneability of THz Bragg structures, fabricated with a commercial 3D printer, is demonstrated and characterised. The 3D printed THz Bragg structure characterisation is evaluated with finite-difference time-domain electromagnetic simulations and with a free-space THz experimental testbed. The absorptive effects of filament material selection are considered for THz Bragg structures with and without optical path equalization (i.e., responses of THz Bragg structures versus THz Bragg superstructures). The effect of commercial 3D printer Z-axis fabrication resolution is shown for the 3D printed THz Bragg structures. Frequency-domain stop-band metrics are analysed in terms of transmission loss, bandwidth, and frequency placement. Terahertz Bragg structures and superstruc…
aggregated CHO: https://circle.library.ubc.ca/rest/handle/2429/89039
note: TERAHERTZ CHARACTERISATIONS AND ANALYSES OF ADDITIVE MANUFACTURING MATERIALS AND STRUCTURES by C. Harrison Brodie B. Eng., University of Guelph, 2017 M.A.Sc., University of Guelph, 2019 A DISSERTATION SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF DOCTOR OF PHILOSOPHY in THE COLLEGE OF GRADUATE STUDIES (Electrical Engineering) THE UNIVERSITY OF BRITISH COLUMBIA (Okanagan) August 2024 © C. Harrison Brodie, 2024 ii The following individuals certify that they have read, and recommend to the College of Graduate Studies for acceptance, a dissertation entitled: Terahertz Characterisations and Analyses of Additive Manufacturing Materials and Structures submitted by C. Harrison Brodie in partial fulfillment of the requirements of the degree of Doctor of Philosophy. Dr. Christopher Collier, School of Engineering, The University of British Columbia Supervisor Dr. Jonathan Holzman, School of Engineering, The University of British Columbia Supervisory Committee Member Dr. Ian Foulds, School of Engineering, The University of British Columbia Supervisory Committee Member Dr. Rudolf Seethaler, School of Engineering, The University of British Columbia University Examiner Dr. David Cooke, Department of Physics, McGill University External Examiner iii Abstract Assembly of free-space terahertz (THz) research instrumentation systems necessitate the use of application specific THz compatible optical components. The development, procurement, and expense of THz compatible optical components can be prohibitive for research stakeholders. Commercial three-dimensional (3D) printing (i.e., additive manufacturing) systems are investigated in this thesis, with regard to filament material selection and component fabrication, to address the accessibility of THz compatible optical components. The availability of emerging 3D printing filament materials increases year over year, prompting a need for literature to keep abreast with material characterisations of absorptive and r…
has type: Thesis/Dissertation
date issued: 2024-11
is shown at: 10.14288/1.0445166
language: eng
degree discipline: Electrical Engineering
provider: Vancouver : University of British Columbia Library
publisher: University of British Columbia
rights: Attribution-NonCommercial-NoDerivatives 4.0 International
rights URI: http://creativecommons.org/licenses/by-nc-nd/4.0/
scholar level: Graduate
contributor: Collier, Christopher Michael
type: Text
identifier URI: http://hdl.handle.net/2429/89039