Transmission of high-power terahertz beams with orbital angular momentum through atmosphere

Terahertz remote sensing, transmission of terahertz radiation for communication, and other applications which require transport of terahertz radiation at a distance permanently attract great attention. Security, spectroscopy, lidar techniques, and data transmission are areas of interest. Depending on the goals and the environment (atmosphere or space), in different applications the word “remote” can mean distances of tens of centimeters to hundreds of meters and more. In this paper we describe experiments on formation of “non-diffractive” terahertz vortex Bessel beams and study their propagation through atmosphere. Self-healing of beams with topological charges ±1 and ±2 was demonstrated.