Auteur(s): Grigelionis I., Bialek M., Grynberg M., Czapkiewicz M., Kolkovskiy V., Wiater M., Wojciechowski T., Wróbel J., Wojtowicz T., But D., Knap W., Lusakowski J.
(Article) Publié:
Acta Physica Polonica A, vol. 122 p.1069-1072 (2012)
Texte intégral en Openaccess : 
Ref HAL: hal-00809761_v1
DOI: 10.12693/APhysPolA.122.1069
WoS: 000312229400029
Exporter : BibTex | endNote
Résumé:
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 mu m 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.