Generation of THz Vortex Beams and Interferometric Determination of Their Topological Charge

被引：5

作者：

Pinnock, Samuel W. ^{[1
]}

Roh, Seulki ^{[1
]}

Biesner, Tobias ^{[1
]}

Pronin, Artem V. ^{[1
]}

Dressel, Martin ^{[1
]}

机构：

[1] Univ Stuttgart, Phys Inst 1, D-70569 Stuttgart, Germany

来源：

IEEE TRANSACTIONS ON TERAHERTZ SCIENCE AND TECHNOLOGY | 2023年 / 13卷 / 01期

关键词：

Time-domain analysis; Spirals; Refractive index; Optical vortices; Frequency-domain analysis; Extraterrestrial measurements; Beams; 3-D printed optical components; frequency-domain terahertz (THz) spectroscopy; Laguerre-Gaussian beams; orbital angular momentum (OAM); spiral phase plates (SPPs); THz vortex beams; topological charge; ORBITAL ANGULAR-MOMENTUM; OPTICAL VORTEX; PHASE; LIGHT; VORTICES;

D O I：

10.1109/TTHZ.2022.3221369

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

this article, we developed and demonstrated the efficacy of 3-D printed spiral phase plates (SPPs) for the generation of vortex terahertz (THz) beams with angular momenta P = +/- 1 and P = +/- 2. The vortex beam generation was confirmed by means of frequency-domain transmission spectroscopy. The topological charge P of the vortex beams was determined via phase-sensitive Mach-Zehnder interferometry, which enabled the superposition of a vortex beam with P and its conjugate beam with -P. The resulting interference patterns were found to be consistent with the expected intensity distributions for a given P, which provides strong confirmation of the spatial phase structure of the generated vortex beams in the THz regime.

引用

页码：44 / 49

页数：6

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