Structured light beams offer promising properties for a variety of applications
but the generation of broadband structured light remains a challenge. New opportunities are emerging in the terahertz frequency range owing to recent progress in light-driven ultrafast vectorial currents through spatially patterning spintronic and optoelectronic systems.
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Zhan, Q. W. Cylindrical vector beams: from mathematical concepts to applications. Adv. Opt. Photonics 1 , 1–57 (2009)..
Lax, M., Louisell, W. H. & McKnight, W. B. From Maxwell to paraxial wave optics. Phys. Rev. A 11 , 1365–1370 (1975)..
Youngworth, K. S. & Brown, T. G. Focusing of high numerical aperture cylindrical-vector beams. Opt. Express 7 , 77–87 (2000)..
Quabis, S. et al. Focusing light to a tighter spot. Opt. Commun. 179 , 1–7 (2000)..
Dorn, R., Quabis, S. & Leuchs, G. Sharper focus for a radially polarized light beam. Phys. Rev. Lett. 91 , 233901 (2003)..
Nanni, E. A. et al. Terahertz-driven linear electron acceleration. Nat. Commun. 6 , 8486 (2015)..
Hibberd, M. T. et al. Acceleration of relativistic beams using laser-generated terahertz pulses. Nat. Photonics 14 , 755–759 (2020)..
Novotny, L. et al. Longitudinal field modes probed by single molecules. Phys. Rev. Lett. 86 , 5251–5254 (2001)..
Petrov, N. V. et al. Design of broadband terahertz vector and vortex beams: Ⅰ. review of materials and components. Light Adv. Manuf. 3 , 640–652 (2022)..
Wang, S. J. et al. Flexible generation of structured terahertz fields via programmable exchange-biased spintronic emitters. eLight 4 , 11 (2024)..
Seifert, T. et al. Efficient metallic spintronic emitters of ultrabroadband terahertz radiation. Nat. Photonics 10 , 483–488 (2016)..
Seifert, T. S. et al. Spintronic sources of ultrashort terahertz electromagnetic pulses. Appl. Phys. Lett. 120 , 180401 (2022)..
Albisetti, E. et al. Nanopatterning reconfigurable magnetic landscapes via thermally assisted scanning probe lithography. Nat. Nanotechnol. 11 , 545–551 (2016)..
Zdagkas, A. et al. Observation of toroidal pulses of light. Nat. Photonics 16 , 523–528 (2022)..
Pettine, J. et al. Light-driven nanoscale vectorial currents. Nature 626 , 984–989 (2024)..