Title :
Cyclotron absorption in two-dimensional electron systems monitored by terahertz time-domain spectroscopy
Author :
Upadhya, P.C. ; Cunningham, J.E. ; Tiang, C.K. ; Lachab, M. ; Khanna, S.P. ; Linfield, E.H. ; Davies, A.G.
Author_Institution :
Sch. of Electron. & Electr. Eng., Univ. of Leeds, Leeds
Abstract :
We have measured the far-infrared cyclotron absorption of a two-dimensional electron systems (2DES), formed in a GaAs/Al0.33Ga0.67As heterojunction, using transmission-mode terahertz (THz) time-domain spectroscopy. The frequency of cyclotron absorption was proportional to applied magnetic field (B-field) across the measurement range, and from this data, the electron effective mass was extracted. The temperature-dependence of the cyclotron absorption was also studied between 1.5-150 K, allowing the dynamics of electron scattering in the 2D electron system to be determined.
Keywords :
cyclotron radiation; electromagnetic wave absorption; submillimetre wave spectroscopy; 2D electron systems; effective electron mass; far-infrared cyclotron absorption; magnetic field; terahertz time-domain spectroscopy; transmission-mode terahertz; Absorption; Cyclotrons; Electrons; Gallium arsenide; Heterojunctions; Magnetic field measurement; Monitoring; Spectroscopy; Submillimeter wave measurements; Time domain analysis; cyclotron resonance (CR); electron scattering; terahertz spectroscopy; time-domain;
Conference_Titel :
Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on
Conference_Location :
Cardiff
Print_ISBN :
978-1-4244-1438-3
DOI :
10.1109/ICIMW.2007.4516595
