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Title: High-performance 1.06-μm InGaAs/GaAs double-quantum-well semiconductor lasers with asymmetric heterostructure layers
Authors: Qiao, Zhongliang
Li, Xiang
Wang, Hong
Li, Te
Gao, Xin
Qu, Yi
Bo, Baoxue
Liu, Chongyang
Keywords: Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Issue Date: 2019
Source: Qiao, Z., Li, X., Wang, H., Li, T., Gao, X., Qu, Y., Bo, B. & Liu, C. (2019). High-performance 1.06-μm InGaAs/GaAs double-quantum-well semiconductor lasers with asymmetric heterostructure layers. Semiconductor Science and Technology, 34(5), 055013-.
Journal: Semiconductor Science and Technology
Abstract: High-performance 1.06-μm InGaAs/GaAs double-quantum-well (DQW) asymmetric herero- structure semiconductor lasers have been designed, fabricated and characterized. The laser structure, grown by metal-organic chemical vapor deposition (MOCVD), mainly consists of compositionally graded p-Al Ga As upper cladding layers, a p-Al Ga As upper waveguide layer, a 1.06-μm InGaAs/GaAs DQW active region, an un-doped In Ga As P lower waveguide layer, and compositionally graded n-doped In Ga As P lower cladding layers. Measurement results of the as-cleaved ridge waveguide (RWG) lasers with a contact ridge width of 25 μm and different cavity lengths (900 to 2765 μm) demonstrated state-of-the-art performances with a high internal quantum efficiency (η ) of ∼98.4% and a low internal optical loss (α ) of ∼1.01 cm at 20 °C. The laser has demonstrated high characteristic temperatures of 245 K (T ) and 663 K (T ) from 20 to 50 °C, and the cavity length dependent behaviour of T and T has also been investigated from 20 to 80 °C. Furthermore, a low transparency current density (J ) of 77 A/cm /QW in this laser structure is obtained at 20 °C, which is among one of the lowest values reported so far for 1.06-μm InGaAs/GaAs semiconductor lasers.
ISSN: 0268-1242
DOI: 10.1088/1361-6641/ab110b
Rights: © 2019 IOP Publishing Ltd (Institute of Physics). All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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