Abstract-Experimental demonstration of magnetoplasmon polariton at InSb(InAs)/dielectric interface for terahertz sensor application

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• Jan Chochol, 
• Kamil Postava, 
• Michael Čada & 
• Jaromír Pištora

https://www.nature.com/articles/s41598-017-13394-0

We experimentally demonstrate surface plasmon resonance (SPR) in the terahertz range in InSb and InAs. The surface plasmon is excited on the interface between a thin polymer film and the semiconductor using a silicon prism in Otto configuration. The low effective mass of InSb and InAs permits tuning of the SPR by an external magnetic field in the transversal configuration. The data show a good agreement with a model. Strong excitation of the surface plasmon is present in both materials, with a shifting of resonance position by more than 100 GHz for the field of 0.25 T, to both higher and lower energies with opposite orientation of the magnetic field. Applicability of the terahertz SPR sensor is discussed, along with modeled design for the Kretschmann configuration.

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.

Abstract-Magneto-optical properties of InSb for terahertz applications

Jan Chochol, Kamil Postava, Michael Čada, Mathias Vanwolleghem, Lukáš Halagačka, Dominique Vignaud, Jean-François Lampin, Jaromír Pištora

(Submitted on 5 Sep 2016)

http://arxiv.org/abs/1609.01158

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.