LA12855B
- By examining how garnet crystals reflect and transmit light, we observed the rare occurrence of a hybrid mode where the material displays electric and magnetic characteristics simultaneously. Amazingly, evidence of the hybrid mode vanishes from the reflectivity spectra but remains strong for the transmitted light. We developed an explanation called the Adjusted Oscillator Strength Matching (AOSM) condition to describe this unique electric and magnetic behavior. A possible application of this effect is in antireflection coatings. Using a variety of complementary optical techniques, such as reflectivity, transmittance and ellipsometry, we measured the material’s dielectric permittivity and magnetic permeability in the far infrared frequency range. This work is important in furthering the understanding of when coupling between magnetic excitations such as magnons and electric excitations such as phonons occurs inside a material.
