scholarly journals Intersubband absorption properties of high Al content Al x Ga1−xN/GaN multiple quantum wells grown with different interlayers by metal organic chemical vapor deposition

2012 ◽  
Vol 7 (1) ◽  
Author(s):  
He Hui Sun ◽  
Feng Yun Guo ◽  
Deng Yue Li ◽  
Lu Wang ◽  
Dong Bo Wang ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Chemical Vapor ◽  
Organic Chemical ◽  
Multiple Quantum ◽  
Absorption Properties ◽  
Al Content ◽  
Intersubband Absorption ◽  
Metal Organic ◽  
High Al Content ◽  
Organic Chemical Vapor Deposition

Intersubband Transitions in GaN/AlxGa1-xN Multi Quantum Wells

2004 ◽  
Vol 829 ◽  
Author(s):  
E. A. DeCuir ◽  
Y. C. Chua ◽  
B. S. Passmore ◽  
J. Liang ◽  
M. O. Manasreh ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Chemical Vapor ◽  
Charge Carriers ◽  
Organic Chemical ◽  
Multiple Quantum ◽  
Intersubband Transitions ◽  
Metal Organic ◽  
Si Doped ◽  
Organic Chemical Vapor Deposition ◽  
Absorption Technique

ABSTRACTIntersubband transitions (ISTs) in GaN/AlxGa1-xN multiple quantum wells (MQWs) were investigated using an optical absorption technique. Several samples were grown by either Molecular Beam Epitaxy (MBE) or Metal-Organic Chemical Vapor Deposition (MOCVD) and were investigated using both normal incident and waveguide configurations. The waveguides were fabricated by dicing each sample into 2 mm wide by 5 mm long pieces with two facets polished at 45 degrees with respect to the surface such that light propagates across the sample's width. Preliminary results indicate that ISTs are observable in Si-doped and undoped GaN/AlxGa1-xN MQWs. The source of these charge carriers in the undoped samples are explained as being due to the spontaneous polarization effect which exists at the GaN/AlxGa1-xN interfaces where the GaN surface has Ga-polarity. Scanning Electron Microscopy indicates that a sample containing what appeared to be a large number of cracks and or hexagonal voids lacked the presence of ISTs.

Investigation of the growth temperature on indium diffusion in InGaAs/GaAsP multiple quantum wells and photoelectric properties

RSC Advances ◽  
2015 ◽  
Vol 5 (92) ◽  
pp. 75211-75217 ◽  
Author(s):  
Hailiang Dong ◽  
Jing Sun ◽  
Shufang Ma ◽  
Jian Liang ◽  
Bingshe Xu
Keyword(s):  
Chemical Vapor Deposition ◽  
Quantum Wells ◽  
Vapor Deposition ◽  
Chemical Vapor ◽  
Organic Chemical ◽  
Multiple Quantum ◽  
Photoelectric Properties ◽  
Metal Organic ◽  
Organic Chemical Vapor Deposition ◽  
Indium Diffusion

InGaAs/GaAsP MQWs grown by metal–organic chemical vapor deposition at different growth temperatures generated an indium diffusion zone (InGaAsP) between InGaAs and GaAsP.

Growth and characterization of semipolar InGaN/GaN multiple quantum wells and light-emitting diodes on (10 11) GaN templates

2005 ◽  
Vol 892 ◽  
Author(s):  
Arpan Chakraborty
Keyword(s):  
Quantum Wells ◽  
Chemical Vapor ◽  
Emission Wavelength ◽  
Organic Chemical ◽  
Multiple Quantum ◽  
Light Emitting ◽  
Metal Organic ◽  
Organic Chemical Vapor Deposition ◽  
Reactor Pressure

AbstractInGaN/GaN MQW samples were grown by metal organic chemical vapor deposition (MOCVD) on (10-1-1) oriented GaN templates. Effects of growth temperature and reactor pressure on the photoluminescence (PL) properties were investigated. The emission intensity improved significantly when the QWs were grown at 100 Torr, compared to higher pressure growths. The effect of well-width on the luminescence properties was investigated and an optimum well width of 40 Å was determined. Excitation dependent PL measurements revealed no shift in the PL emission wavelength suggesting the absence of electric field in the quantum wells. Furthermore, LEDs fabricated on (1011) GaN templates, emitting at 439 nm, showed no shift in the EL emission wavelength with the increase in drive current, reconfirming the absence of polarization.

Epitaxial Growth and Characterization of Nonpolar A-Plane AlGaN-Based Multiple Quantum Wells

2018 ◽  
Vol 934 ◽  
pp. 8-12
Author(s):  
Jian Guo Zhao ◽  
Xiong Zhang ◽  
Jia Qi He ◽  
Shuai Chen ◽  
Zi Li Wu ◽  
...  
Keyword(s):  
Quantum Wells ◽  
Chemical Vapor ◽  
Multiple Quantum Wells ◽  
Modulation Method ◽  
Duty Ratio ◽  
Organic Chemical ◽  
Multiple Quantum ◽  
X Ray Diffraction ◽  
Metal Organic

A serious of non-polar a-plane AlGaN-based multiple quantum wells (MQWs) were successfully grown on the semi-polar r-plane sapphire substrate with metal organic chemical vapor deposition technology. Intense MQWs-related emission peaks at an emission wavelength covered from 277-294 nm were observed based on the photoluminescence measurement. It was found that the employment of the trimethyl-aluminum (TMAl) flow duty-ratio modulation method which was developed based on the two-way pulsed-flows growth technique played a crucial role to control the Al composition of the non-polar a-plane AlGaN epi-layers. The non-polar a-plane AlGaN-based MQWs were deposited with the new developed TMAl flow duty-ratio modulation technique. Evident-3th order X-ray diffraction (XRD) satellite peak was observed from the high resolution-XRD measurement, proving the successful growth of non-polar a-plane AlGaN-based MQWs with abrupt hetero-interfaces.

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