Abstract-Magneto-optical properties of InSb for terahertz applications

Jan Chochol1,2,a), Kamil Postava3, Michael Čada2, Mathias Vanwolleghem4, Lukáš Halagačka1,3, Jean-François Lampin4 and Jaromír Pištora1
http://scitation.aip.org/content/aip/journal/adva/6/11/10.1063/1.4968178?TRACK=RSS
a) Electronic mail: Jan.Chochol@vsb.cz, Jan.Chochol@dal.ca, Jan.Chochol@gmail.com
AIP Advances 6, 115021 (2016); http://dx.doi.org/10.1063/1.4968178

Magneto-optical permittivity tensor spectra of undoped InSb, n-doped and p-doped InSb crystals were determined using the terahertz time-domain spectroscopy (THz-TDS) and the Fourier transform far-infrared spectroscopy (far-FTIR). A Huge polar magneto-optical (MO) Kerr-effect (up to 20 degrees in rotation) and a simultaneous plasmonic behavior observed at low magnetic field (0.4 T) and room temperature are promising for terahertz nonreciprocal applications. We demonstrate the possibility of adjusting the the spectral rage with huge MO by increase in n-doping of InSb. Spectral response is modeled using generalized magneto-optical Drude-Lorentz theory, giving us precise values of free carrier mobility, density and effective mass consistent with electric Hall effect measurement.