✦ LIBER ✦

Phonon heating of two-dimensional exciton gases in GaAs/AlGaAs quantum wells

✍ Scribed by E. S. Moskalenko; A. L. Zhmodikov; A. V. Akimov; A. A. Kaplyanskii; L. J. Challis; T. Cheng; O. H. Hughes

Publisher: John Wiley and Sons
Year: 1995
Tongue: English
Weight: 545 KB
Volume: 507
Category: Article
ISSN: 0003-3804
DOI: 10.1002/andp.19955070204

No coin nor oath required. For personal study only.

✦ Synopsis

We report the first measurements of the interaction of non-equilibrium phonons with twodimensional exciton gases (2DExGs). The rise in the effective temperature of the 2DExG produced by the phonons depends on the width of the quantum well and the exciton sheet density and hence on the ratio 5 -l (ex-ph)/r-' (ex-ex). The dependence of the effective temperature rise on this ratio is attributed to the non-equilibrium frequency distribution of the phonons incident on the 2DExG.

📜 SIMILAR VOLUMES

Spin dynamics of exciton states in GaAS/

Spin dynamics of exciton states in GaAS/AlGaAs multiple quantum wells

✍ B. Dareys; X. Marie; T. Amand; J. Barrau; Y. Shekun; I. Razdobreev; R. Planel 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 195 KB

We report an experimental study of the excitonic spin relaxation dynamics in GaAs/AlGaAs Multiple Quantum Wells (MQW) presenting interface roughness by time and polarization resolved luminescence spectroscopy. The relaxation is found to occur mainly when the excitons are in the free state, before th

Internal Transitions of Neutral and Char

Internal Transitions of Neutral and Charged Magneto-Excitons in GaAs/AlGaAs Quantum Wells

✍ H.A. Nickel; G.S. Herold; T. Yeo; G. Kioseoglou; Z.X. Jiang; B.D. McCombe; A. Pe 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 168 KB 👁 2 views

H.A. Nickel 1 ) (a), G.S. Herold (a), T. Yeo (a), G. Kioseoglou (a), Z.X. Jiang (a), B.D. McCombe (a), A. Petrou (a), D. Broido (b), and W. Schaff (c)

The effects of photoexcited free carrier

The effects of photoexcited free carriers on exciton dynamics in GaAs/AlGaAs quantum wells

✍ B.M. Ashkinadze; E. Cohen; Arza Ron; E. Linder 📂 Article 📅 1994 🏛 Elsevier Science 🌐 English ⚖ 140 KB

We report on the effect of photogenerated free carriers on the spectral diffusion and on the LO-phonon Raman scattering of resonantly excited excitons. This is observed by an exciton population redistribution between localized states and by a decrease in the Raman scattering intensity under an extre

Combined Optical-Microwave Study of Elec

Combined Optical-Microwave Study of Electron–Exciton Dynamic Processes in Undoped GaAs/AlGaAs Quantum Wells

✍ Ashkinadze, B.M. ;Iomin, L. ;Kozhevnikov, M. ;Cohen, E. ;Ron, A. ;Pfeiffer, L.N. 📂 Article 📅 2000 🏛 John Wiley and Sons 🌐 English ⚖ 151 KB 👁 2 views

Thermalization and Photoluminescence Kin

Thermalization and Photoluminescence Kinetics of Statistically-Degenerate Indirect Excitons in GaAs/AlGaAs Coupled Quantum Wells

✍ Soroko, A.V. ;Ivanov, A.L. ;Butov, L.V. 📂 Article 📅 2002 🏛 John Wiley and Sons 🌐 English ⚖ 121 KB 👁 2 views

In order to model the very recent experimental data on the relaxation kinetics and photoluminescence (PL) dynamics of indirect excitons in high-quality GaAs/AlGaAs coupled quantum wells (QWs) at extremely low bath temperatures T b ¼ 0:05 K, we analyze, both analytically and numerically, the relevant

Photoluminescence spectroscopy on excito

Photoluminescence spectroscopy on excitonic states of narrow GaAs–AlGaAs single quantum wells in high magnetic field

✍ H.S. Ko; S.J. Rhee; Y.M. Kim; W.S. Kim; D.H. Kim; J.H. Bae; Y.S. Kim; J.C. Woo; 📂 Article 📅 1998 🏛 Elsevier Science 🌐 English ⚖ 70 KB

Magneto-photoluminescence (PL) experiments of very thin GaAs/Al 0.3 Ga 0.7 As quantum wells were performed in a magnetic field (B) of up to 20 T. It has been observed that the diamagnetic shift changes abruptly from β B 2 to α B around 5 T as B increases, and both α and β become larger as the well-w