Phase-change metasurface for switchable terahertz edge detection and bright-field imaging based on quasi-bound states in the continuum
Abstract
transitions to the metallic state, it switches to bright-field imaging mode. The Optical Transfer Function (OTF) required for Laplacian operations is achieved by exciting the Quasi-Bound States in the Continuum (Q-BIC) mode under p- and s-polarized terahertz wave illumination, which endows the device with an angular dispersive response matching the Laplacian operator's requirements. This differentiator offers dual-polarization-compatible edge detection, and its efficient, high-performance function switching-coupled with the benefits of dual-polarization imaging-provides robust technical support for terahertz-band applications including machine vision, biomedical detection, and image processing.
Fields of Study & Subjects
Metamaterials and Metasurfaces Applications
Terahertz technology and applications
Plasmonic and Surface Plasmon Research
Publication details
- Journal / source
- Nanoscale
- Publisher
- Royal Society of Chemistry (RSC)
- Volume
- 18
- Issue
- 17
- Pages
- 9282–9293
- Publication date
- 1 January 2026
- Language
- EN