FIR RADIATION INTERFEROMETRY IN BISMUTH INDUCED BY A MAGNETIC-FIELD

The study of FIR radiation (lambda = 337 mu m) propagation through a p lane-parallel plate of single crystal bismuth in the presence of a mag netic field is reported. Effects induced by electro-magnetic interfere nce were observed and connected with the propagation of Alfven-waves. The value of the refractive index was found to vary in the range 7.3-4 .6 for the magnetic field interval 3.1-5.0 T. It is shown that a singl e crystal of bismuth inserted in the magnetic field may be used to obt ain interferograms (fast Fourier transform spectroscopy) of submillime ter radiation with a scanning duration of 10(-5) s.