Terahertz vortex beam generation by infrared vector beam rectification
Language
en
Article de revue
This item was published in
Journal of the Optical Society of America B. 2019-01, vol. 36, n° 1, p. 12-18
Optical Society of America
English Abstract
We report on the conversion of an infrared vector beam into terahertz vortex beams using a 110-cut ZnTe cubic crystal. First, we provide a theoretical analysis demonstrating how an infrared vector beam with the azimuthal ...Read more >
We report on the conversion of an infrared vector beam into terahertz vortex beams using a 110-cut ZnTe cubic crystal. First, we provide a theoretical analysis demonstrating how an infrared vector beam with the azimuthal order can be transformed into a terahertz beam endowed with an orbital angular moment content that consists of optical vortices with topological charge ±2. Experimentally, quasi-monochromatic terahertz vortex beams with topological charges +2 and −2 are produced and characterized both in amplitude and phase using real-time two-dimensional imaging of the terahertz electric field. These results enrich the terahertz vortex beam toolbox via the transfer of topological information from infrared to tera-hertz domains.Read less <
Origin
Hal imported