Light-Induced Magnetization From Magnonic Rectification

  • Starts: 11:00 am on Monday, November 4, 2024
  • Ends: 1:00 pm on Monday, November 4, 2024
Rectification is the process of converting an oscillating field or current into a quasistatic one, commonly seen in AC/DC converters. This concept also extends to light-matter interactions, where optical rectification turns the electric field of light into a quasistatic polarization, and phononic rectification converts lattice vibrations into a structural distortion. In our work, we introduce magnonic rectification, a new mechanism in magnetism that transforms oscillating magnetization into a quasistatic state. This is achieved by using a laser-excited chiral phonon to alter spin precession in an antiferromagnet, resulting in a magnetic state similar to a canted antiferromagnet. This opens up new possibilities for creating dynamic spin configurations that are not accessible in normal equilibrium conditions.
Location:
SCI 328
Speaker
Daniel Bustamante
Institution
Boston University
Host
Wanzheng Hu