Design of broadband terahertz vector and vortex beams: II. Holographic assessment

被引：14

作者：

Petrov, Nikolay, V ^{[1
]}

Sokolenko, Bogdan ^{[2
]}

Kulya, Maksim S. ^{[1
]}

Gorodetsky, Andrei ^{[3
]}

Chernykh, Aleksey, V ^{[1
]}

机构：

[1] ITMO Univ, Digital & Display Holog Lab, St Petersburg 197101, Russia

[2] VI Vernadsky Crimean Fed Univ, Simferopol 295007, Russia

[3] Univ Birmingham, Sch Phys & Astron, Birmingham B15 2TT, England

来源：

LIGHT-ADVANCED MANUFACTURING | 2022年 / 3卷 / 04期

基金：

俄罗斯科学基金会; 英国工程与自然科学研究理事会;

关键词：

Terahertz radiation; Vortex beams; Vector beams; Achromatic wave plates; Broadband terahertz; radiation; Digital holography; Terahertz holography; SINGULAR SKELETON; RECONSTRUCTION; DIFFRACTION; GENERATION;

D O I：

10.37188/lam.2022.044

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, we demonstrate the capabilities of the terahertz pulse time-domain holography in visualisation, simulation, and assessment of broadband THz vortex beam formation dynamics upon its shaping by elements of beam converter, and further propagation and manipulation. By adding Jones matrix formalism to describe broadband optical elements, we highlight the differences in the spatio-spectral and spatio-temporal structure of the formed vortex and vector beams dependence on the modulator used and visualise their modal features. The influence of diffraction field structure from each element in the broadband vortex modulator is revealed in numerical simulation and the formed beams are analysed against the simplified Laguerre-Gaussian beam model.

引用

页数：13