Optical vector beams have great potential in many applications, for example optical tweezers, information transmission and processing, laser surface structuring, particle acceleration, and vortex dichroism spectroscopy. However, the reported vector beams in the terahertz (THz) spectral range are limited to exhibiting only low-order topological charges. Therefore, methodologies to generate THz vector beams bearing a tailored topological charge are highly desired. This work investigates how to generate THz vector beams with a tailored topological charge via the optical rectification process in a 111-cut ZnTe crystal pumped with a vector optical beam and how to manipulate the vector THz beam's polarization state through the initial polarization angle. We theoretically and experimentally demonstrate that the transduction process produces a THz topological charge twice that of the infrared pump, also admitting the opposite sign. Given the well-developed technology to design infrared vector beams, the proposed method can generate THz vector beams with tailored topological charges.

Generation of terahertz vector beam bearing tailored topological charge / Mou, S; D'Arco, A; Tomarchio, L; Macis, S; Curcio, A; Lupi, S; Petrarca, M. - In: APL PHOTONICS. - ISSN 2378-0967. - 8:3(2023), p. 036103. [10.1063/5.0141691]

Generation of terahertz vector beam bearing tailored topological charge

D'Arco, A;Tomarchio, L;Macis, S;Lupi, S;Petrarca, M
2023

Abstract

Optical vector beams have great potential in many applications, for example optical tweezers, information transmission and processing, laser surface structuring, particle acceleration, and vortex dichroism spectroscopy. However, the reported vector beams in the terahertz (THz) spectral range are limited to exhibiting only low-order topological charges. Therefore, methodologies to generate THz vector beams bearing a tailored topological charge are highly desired. This work investigates how to generate THz vector beams with a tailored topological charge via the optical rectification process in a 111-cut ZnTe crystal pumped with a vector optical beam and how to manipulate the vector THz beam's polarization state through the initial polarization angle. We theoretically and experimentally demonstrate that the transduction process produces a THz topological charge twice that of the infrared pump, also admitting the opposite sign. Given the well-developed technology to design infrared vector beams, the proposed method can generate THz vector beams with tailored topological charges.
2023
terahertz radiation; spectroscopy; geometrical optics; liquid crystals; polarization; optical rectification; gaussian beam
01 Pubblicazione su rivista::01a Articolo in rivista
Generation of terahertz vector beam bearing tailored topological charge / Mou, S; D'Arco, A; Tomarchio, L; Macis, S; Curcio, A; Lupi, S; Petrarca, M. - In: APL PHOTONICS. - ISSN 2378-0967. - 8:3(2023), p. 036103. [10.1063/5.0141691]
File allegati a questo prodotto
File Dimensione Formato  
Mou_Generation_2023.pdf

solo gestori archivio

Note: Articolo
Tipologia: Versione editoriale (versione pubblicata con il layout dell'editore)
Licenza: Tutti i diritti riservati (All rights reserved)
Dimensione 5.44 MB
Formato Adobe PDF
5.44 MB Adobe PDF   Contatta l'autore

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1678829
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 2
  • ???jsp.display-item.citation.isi??? 2
social impact