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Article Dans Une Revue Journal of the Optical Society of America B Année : 2019

Terahertz vortex beam generation by infrared vector beam rectification

Résumé

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.
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Dates et versions

hal-02152636 , version 1 (11-06-2019)

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Paternité - Pas d'utilisation commerciale - Partage selon les Conditions Initiales

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Ali Al Dhaybi, Jerome Degert, Etienne Brasselet, Emmanuel Abraham, Eric Freysz. Terahertz vortex beam generation by infrared vector beam rectification. Journal of the Optical Society of America B, 2019, 36 (1), pp.12-18. ⟨10.1364/JOSAB.36.000012⟩. ⟨hal-02152636⟩

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