| Issue |
EPL
Volume 149, Number 4, February 2025
|
|
|---|---|---|
| Article Number | 45001 | |
| Number of page(s) | 4 | |
| Section | Atomic, molecular and optical physics | |
| DOI | https://doi.org/10.1209/0295-5075/adac07 | |
| Published online | 28 February 2025 | |
Near-field optical measurement and analysis of Talbot effect in terahertz band
1 School of Physics and Materials Science, Nanchang University - Nanchang 330031, China
2 Institute of Space Science and Technology, Nanchang University - Nanchang 330031, China
Received: 26 November 2024
Accepted: 20 January 2025
Direct experimental observation of the near-field images in grating structures for terahertz band is studied by scanning near-field microscope. It is shown that self-images and anti-imaging can be separately achieved near integer and half-integer multiples of the Talbot distance. Particularly, non-paraxial approximation is studied for cases where the lattice constant of the grating is marginally greater than the incident wavelength. These results provide guidance for manipulation terahertz wave propagation and facilitate the potential applications in imaging, sensing and communication systems.
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