Terahertz Spectroscopy of Double CdTe/CdMgTe Quantum Wells
D. Yavorskiya, M. Szołaa, K. Karpierza, I. Własnya, D. Śnieżekb, P. Nowickib, J. Wróbelb, S. Chusnutdinowb, G. Karczewskib, T. Wojtowiczc, J. Łusakowskia
aInstitute of Experimental Physics, Faculty of Physics, University of Warsaw, L. Pasteura 5, PL-02093 Warsaw, Poland
bInstitute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland
cInternational Research Centre - MagTop, Institute of Physics, Polish Academy of Sciences, Aleja Lotnikow 32/46, PL-02668 Warsaw, Poland
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Modulation doped CdTe/CdMgTe double quantum wells were studied at low temperatures and high magnetic fields. Transmission of THz monochromatic radiation from a molecular laser was studied as a function of magnetic field on samples with a grid processed on the surface either by evaporation of metallic stripes or by etching stripe-like trenches which cut only the well positioned closer to the surface. We compare dispersion relations of THz excitations in these samples and in an unprocessed one and we show that the strength of magnetoplasmon excitations in samples studied can be considered as a promising basis to construct magnetic-field tunable THz detectors.

DOI:10.12693/APhysPolA.136.617
topics: THz, terahertz spectroscopy, quantum well, magnetoplasmon, cyclotron resonance