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Synopsis: Optical Vortices Can Probe Magnetism. Jun 12, 2019.
https://physics.aps.org/synopsis-for/10.1103/PhysRevLett.122.237401
A. A. Sirenko, P. Marsik, et al. Terahertz Vortex Beam as a Spectroscopic Probe of Magnetic Excitations. Phys. Rev. Lett. 122, 237401. Jun 12, 2019.
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.237401
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