Tunability of intersubband transition wavelength in the atmospheric window in AlGaN/GaN multi-quantum wells grown on different AlGaN templates by metalorganic chemical vapor deposition
Tunability of intersubband transition wavelength in the atmospheric window in AlGaN/GaN multi-quantum wells grown on different AlGaN templates by metalorganic chemical vapor deposition
复制标题
金属有机化学气相沉积在不同 AlGaN 模板上生长的 AlGaN/GaN 多量子阱大气窗口中子带间跃迁波长的可调性
DOI：
10.1063/1.4754543
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发表时间：
2012-09-15
影响因子：
3.2
通讯作者：
Chen, C. Q.
中科院分区：
文献类型：
--
作者：
Tian, W.;Yan, W. Y.;Chen, C. Q.
研究了金属有机化学气相沉积法在不同AlGaN模板上生长的AlGaN/GaN多量子阱（mqw）的亚带间跃迁特性。利用拉曼光谱和倒易空间映射研究了GaN阱的应变状态，结果表明，当Al摩尔组成在0 ~ 0.3范围内变化时，GaN阱呈现压缩应变，压缩应变增大。傅里叶变换红外光谱仪结果表明，当AlGaN模板的Al摩尔组成增加时，AlGaN/GaN MQWs的子带间过渡波长可从5.14 μm调谐到4.65 μm。这一结果可归因于量子受限斯塔克效应。
The properties of intersubband transition in AlGaN/GaN multi-quantum wells (MQWs) grown on different AlGaN templates by metalorganic chemical vapor deposition are investigated. The strain states of GaN wells are studied by Raman spectra and reciprocal space mappings, which shows that the GaN wells are compressively strained and the compressive strain is increased when the Al mole composition is varied from 0 to 0.3. The Fourier transform infrared spectrometer results show that the intersubband transition wavelength in the AlGaN/GaN MQWs can be tuned from 5.14 μm to 4.65 μm when the Al mole composition of the AlGaN template is increased. The results can be attributed to the quantum confined Stark effect.