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Terahertz Vortex Beam as a Spectroscopic Probe of Magnetic Excitations.
Sirenko, A A; Marsik, P; Bernhard, C; Stanislavchuk, T N; Kiryukhin, V; Cheong, S-W.
Afiliación
  • Sirenko AA; Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.
  • Marsik P; Department of Physics, University of Fribourg, CH-1700 Fribourg, Switzerland.
  • Bernhard C; Department of Physics, University of Fribourg, CH-1700 Fribourg, Switzerland.
  • Stanislavchuk TN; Department of Physics, New Jersey Institute of Technology, Newark, New Jersey 07102, USA.
  • Kiryukhin V; Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.
  • Cheong SW; Rutgers Center for Emergent Materials and Department of Physics and Astronomy, Rutgers University, Piscataway, New Jersey 08854, USA.
Phys Rev Lett ; 122(23): 237401, 2019 Jun 14.
Article en En | MEDLINE | ID: mdl-31298919
Circularly polarized light with spin angular momentum is one of the most valuable probes of magnetism. We demonstrate that light beams with orbital angular momentum (OAM), or vortex beams, can also couple to magnetism exhibiting dichroisms in a magnetized medium. Resonant optical absorption in a ferrimagnetic crystal depends strongly on both the handedness of the vortex and the direction of the beam propagation with respect to the sample magnetization. This effect exceeds the conventional dichroism for circularly polarized light. Our results demonstrate the high potential of the vortex beams with OAM as a new spectroscopic probe of magnetism in matter.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos
Texto completo
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Imprimir
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: Phys Rev Lett Año: 2019 Tipo del documento: Article País de afiliación: Estados Unidos Pais de publicación: Estados Unidos