Terahertz-optical properties of a bismuth ferrite single crystal
Transmission through a (100)-oriented single crystal of bismuth ferrite (BiFeO3) was studied at frequencies of 0.485-0.765 THz with a continuous-wave source and in the temperature range of 30-350 K as a function of polarization angle. The fine splitting of spin-wave modes that could be detected with our vector network analyzer-based spectrometer is shown to depend on polarization angle. The crystal shows strong, temperature-dependent, linear dichroism. The interference pattern produced in the sample slab revealed a huge birefringence. The fine splitting dependence on polarization angle suggests correlation with the observed dichroism and the birefringence.
PhysRevB.99.064429.pdf
Publisher's Version
Published version
openaccess
CC BY
2.68 MB
Adobe PDF
0ef7dcd4f7baa80837a2a1a103a5fec2