The use of AlInN-delta-GaN quantum wells (QWs) active region for ultraviolet (UV) laser with wavelength (λ) ∼ 250–300 nm was proposed and investigated in this work. The design of active region consists of 24 Å staggered Al0.91In0.09N/Al0.82In0.18N layers with a 3 Å lattice-matched GaN delta layer, which enables dominant conduction band (C) to heavy hole (HH) subband transition. In addition, the insertion of the ultra-thin delta GaN layer will strongly localize the electron-hole wave functions toward the center of the QW, which leads to large transverse electric (TE) polarized optical gain. In comparison to the use of a conventional AlGaN QW system, the proposed AlInN-delta-GaN QW structure results in ∼3 times improvement in TE-gain at 255 nm. By tuning the delta-GaN thickness, the TE-polarized optical gain up to 3700 cm−1 can be obtained for λ ∼ 280–300 nm, which is very promising to serve as an alternative active region for high-efficiency UV lasers.
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28 February 2016
Research Article|
February 24 2016
Proposal and physics of AlInN-delta-GaN quantum well ultraviolet lasers
Cheng Liu;
Cheng Liu
a)
Department of Electrical and Microelectronic Engineering,
Rochester Institute of Technology
, Rochester, New York 14623, USA
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Yu Kee Ooi;
Yu Kee Ooi
Department of Electrical and Microelectronic Engineering,
Rochester Institute of Technology
, Rochester, New York 14623, USA
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Jing Zhang
Jing Zhang
b)
Department of Electrical and Microelectronic Engineering,
Rochester Institute of Technology
, Rochester, New York 14623, USA
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a)
Electronic mail: cl7007@rit.edu.
b)
Electronic mail: Jing.Zhang@rit.edu.
J. Appl. Phys. 119, 083102 (2016)
Article history
Received:
November 18 2015
Accepted:
February 09 2016
Citation
Cheng Liu, Yu Kee Ooi, Jing Zhang; Proposal and physics of AlInN-delta-GaN quantum well ultraviolet lasers. J. Appl. Phys. 28 February 2016; 119 (8): 083102. https://doi.org/10.1063/1.4942524
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