# Fourier single-pixel imaging in the terahertz regime

## TL;DR

This paper demonstrates Fourier single-pixel imaging in the terahertz regime using a graphene-based modulator, achieving high-quality images with fewer measurements and improved image quality over Hadamard methods.

## Contribution

The work introduces a Fourier single-pixel imaging technique in the terahertz range with a novel graphene-based modulator, enhancing image quality and measurement efficiency.

## Key findings

- High-quality terahertz images reconstructed with fewer measurements
- Deep photo-induced terahertz modulation improves image quality
- Fourier approach outperforms Hadamard single-pixel imaging

## Abstract

We demonstrate Fourier single-pixel imaging in the terahertz regime. The experimental system is implemented with a photo-induced coded aperture setup, where a monolayer graphene on a high-resistance silicon substrate illuminated by a coded laser beam works as a terahertz modulator. Results show that high-quality terahertz images can be reconstructed using greatly reduced number of measurements. We further find that deep photo-induced terahertz modulation by adding a monolayer graphene on the silicon substrate and by using high laser power can significantly improve the image quality. Compared to Hadamard single-pixel imaging with re-ordered Hadamard matrix, the Fourier approach has higher image quality. We expect that this work will speed up the efficiency of single-pixel terahertz imaging and advance terahertz imaging applications.