title: Synthetic aperture in terahertz in-line digital holography for resolution enhancement.
abstract: Terahertz digital holography is a combination of terahertz technology and digital holography. In digital holography, the imaging resolution is the key parameter in determining the detailed quality of a reconstructed wavefront. In this paper, the synthetic aperture method is used in terahertz digital holography and the in-line arrangement is built to perform the detection. The resolved capability of previous terahertz digital holographic systems restricts this technique to meet the requirement of practical detection. In contrast, the experimental resolved power of the present method can reach 125 μm, which is the best resolution of terahertz digital holography to date. Furthermore, the basic detection of a biological specimen is conducted to show the practical application. In all, the results of the proposed method demonstrate the enhancement of experimental imaging resolution and that the amplitude and phase distributions of the fine structure of samples can be reconstructed by using terahertz digital holography.
authors.forename: Haochong
authors.initials: H
authors.lastname: Huang
authors.forename: Lu
authors.initials: L
authors.lastname: Rong
authors.forename: Dayong
authors.initials: D
authors.lastname: Wang
authors.forename: Weihua
authors.initials: W
authors.lastname: Li
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Deng
authors.forename: Bin
authors.initials: B
authors.lastname: Li
authors.forename: Yunxin
authors.initials: Y
authors.lastname: Wang
authors.forename: Zhiqiang
authors.initials: Z
authors.lastname: Zhan
authors.forename: Xuemin
authors.initials: X
authors.lastname: Wang
authors.forename: Weidong
authors.initials: W
authors.lastname: Wu