Large bandgap blueshifts in the InGaP/InAlGaP laser structure using novel strain-induced quantum well intermixing

Journal Article · Thu Apr 07 04:00:00 EDT 2016 · Journal of Applied Physics

DOI:https://doi.org/10.1063/1.4945104· OSTI ID:22594571

Al-Jabr, A. A.; Majid, M. A.; Alias, M. S.; Ng, T. K.; Anjum, D. H. ^[1]

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1. Advanced Nanofabrication, Imaging and Characterization Core Facilities, (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia (KSA) (Saudi Arabia)

We report on a novel quantum well intermixing (QWI) technique that induces a large degree of bandgap blueshift in the InGaP/InAlGaP laser structure. In this technique, high external compressive strain induced by a thick layer of SiO{sub 2} cap with a thickness ≥1 μm was used to enhance QWI in the tensile-strained InGaP/InAlGaP quantum well layer. A bandgap blueshift as large as 200 meV was observed in samples capped with 1-μm SiO{sub 2} and annealed at 1000 °C for 120 s. To further enhance the degree of QWI, cycles of annealing steps were applied to the SiO{sub 2} cap. Using this method, wavelength tunability over the range of 640 nm to 565 nm (∼250 meV) was demonstrated. Light-emitting diodes emitting at red (628 nm), orange (602 nm), and yellow (585 nm) wavelengths were successfully fabricated on the intermixed samples. Our results show that this new QWI method technique may pave the way for the realization of high-efficiency orange and yellow light-emitting devices based on the InGaP/InAlGaP material system.

• OSTI ID: 22594571
• Journal Information: Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 13 Vol. 119; ISSN JAPIAU; ISSN 0021-8979
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM PHOSPHIDES
ANNEALING
EFFICIENCY
GALLIUM PHOSPHIDES
INDIUM PHOSPHIDES
LASERS
LAYERS
LIGHT EMITTING DIODES
MEV RANGE 100-1000
QUANTUM WELLS
SILICA
SILICON OXIDES
STRAINS
THICKNESS
WAVELENGTHS