Spin Dynamics in n-doped CdTe quantum wells: Interplay of excitons, trions and two-dimensional electron gas

2006 ◽  
Author(s):  
Z. Chen ◽  
R. Bratschitsch ◽  
S. G. Carter ◽  
S. T. Cundiff ◽  
D. R. Yakovlev ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Spin Dynamics ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas

Spin coherence of two-dimensional electron gas in CdTe/(Cd,Mg)Te quantum wells

2006 ◽  
Vol 243 (4) ◽  
pp. 878-881 ◽  
Author(s):  
E. A. Zhukov ◽  
D. R. Yakovlev ◽  
M. Bayer ◽  
G. Karczewski ◽  
T. Wojtowicz ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Electron Gas ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Spin Coherence ◽  
Two Dimensional Electron Gas ◽  
Dimensional Electron Gas

scholarly journals Исследование параметров двумерного электронного газа в квантовых ямах InGaN/GaN методом терагерцового плазмонного резонанса

2021 ◽  
Vol 55 (11) ◽  
pp. 1059
Author(s):  
Е.Р. Бурмистров ◽  
Л.П. Авакянц
Keyword(s):  
Quantum Wells ◽  
Terahertz Spectroscopy ◽  
Radiation Power ◽  
Electron Gas ◽  
Femtosecond Laser Pulses ◽  
Two Dimensional ◽  
Dimensional Electron ◽  
Two Dimensional Electron Gas ◽  
Plasmon Resonances ◽  
Dimensional Electron Gas

A new approach to determining the parameters of a two-dimensional electron gas in InGaN/GaN quantum wells is proposed. It is based on the method of terahertz spectroscopy with time resolution, within the framework of which the terahertz frequencies of two-dimensional plasmon resonances excited in the studied samples of InGaN/AlGaN/GaN heterostructures by femtosecond laser pulses at a wavelength of 797 nm were recorded. Oscillating behavior of the output terahertz radiation power with minima in the frequency range 1−5 THz is shown, which is associated with the excitation of plasmon oscillations in a two-dimensional electron gas localized in an InGaN/GaN quantum well. During the processing of terahertz spectra, the effect of renormalization of the effective mass of two-dimensional electron gas, as well as phase modulation near the frequencies of plasmon resonances with an increase in the temperature of the sample from 90 to 170 K, was found. The proposed method is non-contact and can be used in a wide temperature range.

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