In-plane polarization anisotropy of the spontaneous emission of M-plane GaN/(Al,Ga)N quantum wells

被引：82
|
作者：
Rau, B
Waltereit, P
Brandt, O
Ramsteiner, M
Ploog, KH
Puls, J
Henneberger, F
机构：
[1] Humboldt Univ, Inst Phys, D-10115 Berlin, Germany
[2] Paul Drude Inst Festkorperelekt, D-10117 Berlin, Germany
来源：
APPLIED PHYSICS LETTERS | 2000年 / 77卷 / 21期
关键词：
D O I：
10.1063/1.1326846
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We study the in-plane polarization of wurtzite GaN/(Al, Ga)N multiple quantum wells. Identical M-plane (1 (1) over bar 00) and C-plane (0001) structures are grown by plasma-assisted molecular-beam epitaxy on gamma -LiAlO2(100) and 6H-SiC(0001), respectively. While the emission from the conventional [0001] oriented wells is isotropic within the growth plane, we observe a strong polarization anisotropy of over 90% for the M-plane sample. The luminescence is polarized normal to [0001] and shows no spectral shift with polarization angle, i.e., it originates solely from A excitons (p(x) and p(y) valence band states). The deviation of the polarization degree from unity is attributed to the mixing with p(z) valence band states due to quantum confinement. (C) 2000 American Institute of Physics. [S0003-6951(00)01147-5].
引用
收藏
页码：3343 / 3345
页数：3
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