title: Single pixel imaging with tunable terahertz parametric oscillator.
abstract: A method of active terahertz imaging based on compressive sampling is demonstrated. A metal mask structure is designed with all modulation matrices engraved on. The imaging approach based on the mask eliminates the need for imaging object movement in point-wise scanning and shows high sensitivity. A terahertz parametric oscillator with tunability from 0.5 to 2.7 THz was used as the light source. Holes with circular, rectangular, and letter "H" shapes were imaged at 1.75 THz at 20% sampling rate. The influence of sampling rates and averaging times on the image was analyzed. Imaging of the letter "H" at different frequencies from 1.0 to 2.2 THz was tested and evaluated, and recognizable results were obtained in the range of 1.4-2.0 THz.
authors.forename: Pan
authors.initials: P
authors.lastname: Duan
authors.forename: Yuye
authors.initials: Y
authors.lastname: Wang
authors.forename: Degang
authors.initials: D
authors.lastname: Xu
authors.forename: Chao
authors.initials: C
authors.lastname: Yan
authors.forename: Zhen
authors.initials: Z
authors.lastname: Yang
authors.forename: Wentao
authors.initials: W
authors.lastname: Xu
authors.forename: Wei
authors.initials: W
authors.lastname: Shi
authors.forename: Jianquan
authors.initials: J
authors.lastname: Yao