Abstract-Broadband high-resolution terahertz single-pixel imaging

Adam Vallés, Jiahuan He, Seigo Ohno, Takashige Omatsu, Katsuhiko Miyamoto

https://arxiv.org/abs/2006.05877

We report a simple single-pixel imaging system with a low mean squared error in the entire terahertz frequency region (3-13 THz) that employs a thin metallic ring with a series of directly perforated random masks and a subpixel mask digitization technique. This imaging system produces high-quality reconstructed images with resolutions of up to 320 x 320 pixels. It can be extended to develop advanced imaging systems in the near-ultraviolet to terahertz region.

Abstract-Terahertz Single-Pixel Imaging Improved by Using Silicon Wafer with SiO2 Passivation

Rongbin She, Wenquan Liu, Guanglu Wei, Yuanfu Lu, Guangyuan Li

https://www.mdpi.com/2076-3417/10/7/2427

We demonstrate terahertz single-pixel imaging is improved by using a photomodulator based on silicon passivated with SiO 2$$ . By exploring various SiO 2$$ thicknesses, we show that the modulation factor of the as-fabricated terahertz photomodulator can reach 0.9, three times that based on bare silicon. This improvement originates from chemical passivation, as well as anti-reflection. Single-pixel imaging experiments based on the compressed sensing method show that reconstructed images adopting the new photomodulator have better quality than the conventional terahertz modulator based on bare silicon. Since the passivation process is routine and low cost, we expect this work will reduce the cost of terahertz photomodulator and single-pixel THz imaging, and advance their applications.