Plasma waves Terahertz detection by field effect transistor in Quantinzing magnetic fields Auteur(s): Boubanga-Tombet S., Teppe F., Knap W., Karpierz K., Lusakowski J., Grynberg M., Dyakonov M., Lyonnet J., Peiris J. M.
Conference: 16th International Conference on Electron Dynamics in Semiconductors, Optoelectronics and Nanostructures (EDISON 16) (, FR, 2009-08-24) Ref HAL: hal-00546391_v1 DOI: 10.1088/1742-6596/193/1/012083 WoS: 000277100400083 Exporter : BibTex | endNote Résumé: Detection of THz radiation by a Field Effect Transistor InGaAs/InAlAs transistor was investigated at 4.2 K as a function of the magnetic field and gate voltage. We observed oscillations of the photovoltaic signal analogous to Shubnikov-de Haas oscillations, as well as their strong enhancement at the cyclotron resonance conditions. The results are successfully quantitatively described within the frame of a recent theory, taking into account a new source of nonlinearity related to Shubnikov-de Haas effect. We show that the detection is due to gated plasmon. |