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Recent Patents on Electrical Engineering
ISSN (Print): 1874-4761
ISSN (Online): 2213-1132
VOLUME: 3
ISSUE: 3
DOI: 10.2174/1874476111003030211









Relative Intensity Noise for Self-Assembled III-Nitrides Quantum-Dot Lasers

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Author(s): Hussein B. AL-Husseini and Amin H. Al-Khursan
Pages 211-217 (7)
Abstract:
Rate-equation model with a four-level system is used to study relative intensity noise (RIN) in III-nitrides quantum-dot (QD) lasers. These levels are: the ground- and excited-states in the QD, the wetting layer (WL) and separate confinement heterostructure (SCH) layers. The most possible relaxation paths and carrier transport are considered in two types of QD structures: GaN/AlxGa1-xN/AlN and InxGa1-xN/ In0.04Ga0.96N /GaN. Effect of: QD and WL compositions, QD sizes, doped and undoped active regions is studied. The RIN is shown to be reduced with higher Al content in the WL, while an increased is shown for InGaN QD structures. RIN decreases with size reduction. Increased doping until 12 acceptors/QD reduced RIN also. The article presents some promising patents on Quantum-Dot Lasers.
Keywords:
III-Nitrides, Relative Intensity Noise (RIN), Quantum-Dot (QD), semiconductor lasers, Nitrides, Intensity, Quantum-Dot, semiconductor, Rate-equation model, WL, Lasers, electromagnetic, AlN, (GaN), (InN), (LDs), (REs), (ES), (GS), doping
Affiliation:
Physics Department, College of Science, Thi-Qar University, Nassiriya, Iraq.