Wu, Shao-Hsuan, Zhang, Yiyao 
ORCID: 0000-0003-1166-6935, Chen, Ke ORCID: 0000-0002-6093-6623 and Yang, Shang Hua
(2024)
DaISy: Diffuser-aided Sub-THz Imaging System.
[Preprint]
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Abstract
Sub-terahertz (Sub-THz) waves possess exceptional attributes, capable of penetrating non-metallic and non-polarized materials while ensuring bio-safety. However, their practicality in imaging is marred by the emergence of troublesome speckle artifacts, primarily due to diffraction effects caused by wavelengths comparable to object dimensions. In addressing this limitation, we present the Diffuser-aided sub-THz Imaging System (DaISy), which utilizes a diffuser and a focusing lens to convert coherent waves into incoherent counterparts. The cornerstone of our progress lies in a coherence theory-based theoretical framework, pivotal for designing and validating the THz diffuser, and systematically evaluating speckle phenomena. Our experimental results utilizing DaISy reveal substantial improvements in imaging quality and nearly diffraction-limited spatial resolution. Moreover, we demonstrate a tangible application of DaISy in the scenario of security scanning, highlighting the versatile potential of sub-THz waves in miscellaneous fields.
| Item Type: | Preprint |
|---|---|
| Additional Information: | These authors (Shao-Hsuan Wu and Yiyao Zhang) contributed equally to this work. 15 pages, 7 figures. Supplemental Document: https://doi.org/10.6084/m9.figshare.25328746 |
| Uncontrolled Keywords: | physics.optics, physics.optics, physics.app-ph |
| Divisions: | Faculty of Science and Engineering > School of Physical Sciences |
| Depositing User: | Symplectic Admin |
| Date Deposited: | 26 Mar 2024 08:20 |
| Last Modified: | 23 Apr 2024 15:53 |
| DOI: | 10.48550/arxiv.2403.03383 |
| Related URLs: | |
| URI: | https://livrepository.liverpool.ac.uk/id/eprint/3179901 |
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