Driving magnetized plasma with femtosecond laser pulses generates Poincaré THz beams carrying both spin and orbital angular momentum

https://www.eurekalert.org/news-releases/1099904

"powerful, structured strong-field THz from magnetized plasma, with topologically programmable polarization textures, including ellipticity/ spatial orientation—tuning methods: adjusting angle between magnetic field/ laser propagation, optimization of laser spot size, varying plasma density tuning frequency while maintaining topological properties... tens to about 150 MV/cm THz field strength... ultrafast quantum control, multidimensional nonlinear spectroscopy, advanced material manipulation"