Terahertz Response of a Point Contact Based on CdTe/CdMgTe Quantum Well in Magnetic Field

• Authors: I. Grigelionis , M. Białek , M. Grynberg , M. Czapkiewicz , V. Kolkovskiy , M. Wiater , T. Wojciechowski , J. Wróbel , T. Wojtowicz , D. But , W. Knap , J. Łusakowski
• Languages of publication: EN

Abstracts

EN

A photoresponse at THz frequencies of a quantum point contact fabricated on a CdTe/CdMgTe quantum well was studied at low temperatures as a function of magnetic field. The spectra show a structure which was interpreted as resulting from the cyclotron resonance and magnetoplasmon excitations. The wavelength of the fundamental magnetoplasmon mode was found to be about 2 μm which coincides with one of dimensions of the point contact. We also discuss the possibility of coupling of magnetoplasmon modes to shallow impurity transitions in the quantum well.

Keywords

EN

85.30.Hi; 73.20.Mf

Discipline

• 73.20.Mf: Collective excitations (including excitons, polarons, plasmons and other charge-density excitations)(for collective excitations in quantum Hall effects, see 73.43.Lp)
• 85.30.Hi: Surface barrier, boundary, and point contact devices

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 2012
• Volume: 122
• Issue: 6
• Pages: 1069-1072

Dates

published

2012-12

Contributors

author

I. Grigelionis

• Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

M. Białek

• Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

M. Grynberg

• Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

author

M. Czapkiewicz

• Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland

author

V. Kolkovskiy

• Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland

author

M. Wiater

• Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland

author

T. Wojciechowski

• Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland

author

J. Wróbel

• Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland

author

T. Wojtowicz

• Institute of Physics, PAS, al. Lotników 32/46, 02-668 Warsaw, Poland

author

D. But

• TERALAB & L2C CNRS, Université Montpellier 2, 34095 Montpellier, France

author

W. Knap

• TERALAB & L2C CNRS, Université Montpellier 2, 34095 Montpellier, France

author

J. Łusakowski

• Institute of Experimental Physics, Faculty of Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland

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Identifiers

DOI

10.12693/APhysPolA.122.1069