High-power terahertz non-diffractive bessel beams with angular orbital momentum: Generation and application

Knyazev, B. A.; Choporova, Yulia Yu.; Pavelyev, V. S.; Володкин, Б. О.; Mitkov, Mikhail S.

doi:10.1109/irmmw-thz.2015.7327684

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Cited by 4 publications

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“…Vortex Bessel beams with topological charges ±1 and ±2 were generated by phase binary axicons with spiral zones (Fig. 1) [7]. The sign of the topological charge can be changed by turning the axicon.…”

Section: Mixed Beamsmentioning

confidence: 99%

Vector and mixed beams with orbital angular momentum

et al. 2018

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Section: Mixed Beamsmentioning

confidence: 99%

Vector and mixed beams with orbital angular momentum

et al. 2018

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“…In this paper we investigated the angular spectrum of Bessel beam formed by a phase diffractive element [2]. Actually, the spectrum is an expansion of the initial wave into plane waves, which enables better understanding of the structure and behavior of such beams.…”

Section: Introductionmentioning

confidence: 99%

Spectrum of spatial frequency of terahertz vortex Bessel beams formed using phase plates with spiral zones

Zhabin¹,

Володкин²,

Knyazev³

et al. 2015

Collection of Selected Papers of the I International Conference on Information Technology and Nanotechnology

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Abstract. This paper presents the first numerical and experimental investigation into the angular spectrum of terahertz Bessel beam with orbital angular momentum generated by a phase plate with spiral zones. The plate was exposed to a Gaussian beam of the Novosibirsk free electron laser. The Bessel beam formed was passed through a collecting lens. The distribution of the intensity of radiation with a wavelength of 141 microns before and after the focusing lens was recorded by a microbolometer array, which was moved along the optical axis by a motorized translation stage. The experimentally measured intensity distributions over the beam cross section recorded along the optical axis are in good agreement with numerical calculations.Keywords: terahertz Bessel beam, free electron laser, phase plate with spiral zones Citation: Zhabin V.N., Volodkin B.O., Knyazev B.A., Mitkov M.S., Pavelyev V.S., Choporova Yu.Yu. Spectrum of spatial frequency of terahertz vortex Bessel beams formed using phase plates with spiral zones.

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