title: Complete presentation of the Gouy phase shift with the THz digital holography.
abstract: Three dimensional information of the Gouy phase shift in a converging spherical terahertz (THz) beam is directly observed by using a THz balanced electro-optic holographic imaging system. The major properties of the Gouy phase shift are presented, including the longitudinal and transverse distributions, relationships with the frequency and the f-number, influence on the THz polarization. The imaging technique supplies an accurate and comprehensive measurement method for observing and understanding the Gouy phase shift.
authors: Department of Physics, Capital Normal University, Beijing Key Lab for Terahertz Spectroscopy and Imaging, Key Laboratory of Terahertz Optoelectronics, Ministry of Education, No.105 XiSanHuan BeiLu, Beijing 100048, China.
authors: Xinke
authors: X
authors: Wang
authors: Wenfeng
authors: W
authors: Sun
authors: Ye
authors: Y
authors: Cui
authors: Jiasheng
authors: J
authors: Ye
authors: Shengfei
authors: S
authors: Feng
authors: Yan
authors: Y
authors: Zhang
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006696:Holography / Q000295:instrumentation*; D021621:Imaging, Three-Dimensional / Q000295:instrumentation*; D007909:Lenses; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D055069:Terahertz Imaging / Q000295:instrumentation*