Rapid photonic THz continuous wave compressive imaging with super-resolution over a large field of viewShow others and affiliations
2025 (English)In: Optica, E-ISSN 2334-2536, Vol. 12, no 11.0, p. 1800-1810Article in journal (Refereed) Published
Abstract [en]
Terahertz (THz) waves play a crucial role in numerous imaging applications, from industrial inspection to medical diagnostics. However, most current THz imaging techniques operate in the pulsed mode, remaining entrenched in the “super-resolution versus practical-level frame rate” dilemma. In this work, we present system-level rapid, super-resolution, and large-field-of-view THz compressive imaging. In the system, by implementing high-speed sampling with low phase noise through CW radiation based on an optical frequency comb, and exploring a VO<inf>2</inf>/mica film THz spatial modulator with advanced trigger threshold (0.37 mJ/cm2) and higher modulation depth (80.4%), we simultaneously break the long-standing trade-off between spatial resolution and temporal speed in THz imaging systems. We experimentally achieve rapid super-resolution THz compressed sensing (CS) imaging with a super-resolution (<λ/65) at video-frame rates (2 fps) over a large field of view of 100 mm2. This work represents a significant step toward application-oriented THz imaging, and holds tremendous promise in biomedical diagnostics, nondestructive testing, and pharmaceutical industries
Place, publisher, year, edition, pages
Optica Publishing Group, 2025. Vol. 12, no 11.0, p. 1800-1810
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:ri:diva-80308DOI: 10.1364/OPTICA.575706Scopus ID: 2-s2.0-105025784873OAI: oai:DiVA.org:ri-80308DiVA, id: diva2:2029027
2026-01-162026-01-162026-01-16Bibliographically approved