Terahertz imaging of composite materials in reflection and transmission mode with a time-domain spectroscopy system
| Autor: | Magnus W. Haakestad, Arthur D. van Rheenen, Trygve Sørgård |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Computer science
business.industry Terahertz radiation Optical instrumentation 02 engineering and technology 021001 nanoscience & nanotechnology Terahertz metamaterials 01 natural sciences 010309 optics Photomixing Optics Mode (computer interface) Transmission (telecommunications) Fiber laser 0103 physical sciences Electronic engineering Time domain 0210 nano-technology Spectroscopy business Reflection (computer graphics) |
| Zdroj: | Proceedings of SPIE |
| ISSN: | 0277-786X |
| Popis: | A fiber-coupled Terahertz time domain spectroscopy (THz-TDS) system based on photoconductive antennas, pumped by a 100-fs fiber laser, has been used to characterize materials in transmission and reflection mode. THz images are acquired by mounting the samples under investigation on an x-y stage, which is stepped through the beam while the transmitted or reflected THz waveform is captured. The samples include a carbon fiber epoxy composite and a sandwich-structured composite panel with an aramid fiber honeycomb core in between two skin layers of fiberglass reinforced plastic. The former has an artificially induced void, and from a comparison of recorded reflected time-domain signals, with and without the void, a simple model for the structure of the composite is proposed that describes the time-domain signals reasonably well. © (2016) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only. Copyright 2016 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. |
| Databáze: | OpenAIRE |
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