Driving Sub-Wavelength Resolution in Terahertz Imaging with Mesoscale Lenses
[EN]A detailed investigation into the enhancement of terahertz (THz) detection via the terajet effect was conducted using mesoscale dielectric lenses of varying shapes and sizes. Polytetrafluoroethylene (PTFE) lenses—including spherical, aspherical, and cubic geometries—were fabricated and tested at...
| Autores: | , , , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2026 |
| País: | España |
| Institución: | Universidad de Salamanca (USAL) |
| Repositorio: | GREDOS. Repositorio Institucional de la Universidad de Salamanca |
| OAI Identifier: | oai:gredos.usal.es:10366/169069 |
| Acceso en línea: | http://hdl.handle.net/10366/169069 |
| Access Level: | acceso embargado |
| Palabra clave: | Terahertz wave imaging Shape System performance Noise Dielectrics Security Spatial resolution Signal resolution Lenses Testing Electronics Computing Methodologies Signal Processing, Computer-Assisted Terahertz Radiation Image Processing, Computer-Assisted Nanotechnology 1203 Ciencia de los ordenadores 3325 Tecnología de las Telecomunicaciones 3307 Tecnología Electrónica 3304 Tecnología de Los Ordenadores procesamiento de señales asistido por ordenador radiación de terahercios nanotecnología procesamiento de imágenes asistido por ordenador electrónica metodologías computacionales lentes |
| Sumario: | [EN]A detailed investigation into the enhancement of terahertz (THz) detection via the terajet effect was conducted using mesoscale dielectric lenses of varying shapes and sizes. Polytetrafluoroethylene (PTFE) lenses—including spherical, aspherical, and cubic geometries—were fabricated and tested at 0.15 THz and 0.3 THz. The results revealed improved responsivity and lower noise equivalent power (NEP), with performance strongly influenced by frequency and lens shape. Notably, aspherical lenses exhibited superior spatial resolution at 0.3 THz while spheric lenses demonstrated higher signal enhancement at the same frequency. These findings highlight the potential of the terajet effect to advance THz detection for applications such as medical imaging, security screening, and non-destructive testing, while offering practical design insights for optimizing THz system performance. |
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