Far-infrared absorption studies of Be acceptors in δ-doped GaAs/AlAs multiple quantum wells

被引：0

作者：

Weimin Zheng

M. P. Halsall

P. Harrison

M. J. Steer

机构：

[1] Shandong University at Weihai,Department of Applied Physics

[2] the University of Manchester,School of Physics and Astronomy

[3] University of Leeds,School of Electronic and Electrical Engineering

[4] University of Sheffield,EPSRC III–V Semiconductor Central Facility, Department of Electronic and Electrical Engineering

来源：

Science in China Series G: Physics, Mechanics and Astronomy | 2006年 / 49卷

关键词：

shallow acceptor impurities; δ-doped; GaAs/AlAs multiple quantum wells; far-infrared absorptions;

D O I：

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中图分类号：

学科分类号：

摘要：

We report a far-infrared absorption study of internal transitions of shallow Be acceptors in both bulk GaAs and a series of δ-doped GaAs/AlAs multiple quantum well samples with well thicknesses of 20, 15 and 10 nm. Low temperature far-infrared absorption measurements clearly show three principal absorption lines due to transitions of Beacceptor states from the ground state to the first three odd-parity excited states, respectively. Using a variational principle, the 2p-1s transition energies of quantum confined Be acceptors are calculated as a function of the well width. It is found that the theoretical calculation of the 2pz → 1s transitions is in good agreement with the D-like line experimental data.

引用

页码：702 / 708

页数：6

共 31 条

[1]

Rochat M.(1998)Far-infrared ( Appl Phys Lett 73 3724-3726

[2]

Faist J.(1985) = 88 μm) electroluminescence in a quantum cascade structure Phys Rev Lett 54 1283-1286

[3]

Beck M.(1997)Binding of shallow donor impurities in quantum-well structures J Appl Phys 81 7135-7140

[4]

Jarosik N. C.(2001)Population inversion in optically pumped asymmetric quantum well terahertz lasers Phys Rev B 63 155314-1-155314-5

[5]

McCombe B. D.(1988)Picosecond far-infrared studies of intra-acceptor dynamics in bulk GaAs and δ-doped AlAs/GaAs quantum wells Phys Rev B 38 4318-4321

[6]

Shanabrook B. V.(1985)Far-infrared study of confinement effects on acceptors in GaAs/Al Phys Rev B 32 5190-5201

[7]

Harrison P.(1995)Ga J Appl Phys 78 4467-4471

[8]

Kelsall R. W.(1996)As quantum wells Phys Rev B 53 12829-12833

[9]

Halsall M. P.(2002)Acceptor spectra of Al J Appl Phys 92 6039-6042

[10]

Harrison P.(1982)Ga Phys Rev B 26 4449-4457

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