Fig. 1: Experimental setup.
From: Magnetic equivalent of electric superradiance in yttrium-iron-garnet films
Mach-Zehnder interferometer using linearly polarized light beam in Voigt (a magnetic field perpendicular to light propagation), and transmission measurement setup with circularly polarized beam in Faraday (b magnetic field parallel to light propagation) geometry. The signal is detected by a bolometer operating at T = 4 K temperature, backward-wave oscillator (BWO) serves as light source, and optical elements are marked by numbers (1 polytetrafluoroethylene focusing lens, 2, 2a linear polarizer, 2b circular polarizer, 3 beam-splitting polarizer, 4 standing mirror, 5 sample in magnetic field, 6 moving mirror, 7 circularly polarized light, 8. standing mirror). Insets show the polarization state of the incoming light (linear for Voigt and circular for Faraday geometry).
