D. Bustamante: Light-induced magnetization from magnonic rectification

  • Starts: 11:00 am on Friday, November 1, 2024
  • Ends: 1:00 pm on Friday, November 1, 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