Wavelength Dependence of Efficiency Limiting Mechanisms in Type-I Mid-Infrared GaInAsSb/GaSb Lasers
| Autor: | Markus-Christian Amann, Stephen J. Sweeney, Alfred R. Adams, Shamsul Arafin, Timothy D. Eales, Barnabas A. Ikyo, Igor P. Marko, Stephan Sprengel |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
business.industry Band gap Hydrostatic pressure Resonance 02 engineering and technology Laser Atomic and Molecular Physics and Optics Auger law.invention Wavelength 020210 optoelectronics & photonics law 0202 electrical engineering electronic engineering information engineering Optoelectronics Spontaneous emission Electrical and Electronic Engineering business Quantum well |
| Zdroj: | IEEE Journal of Selected Topics in Quantum Electronics. 23:1-9 |
| ISSN: | 1558-4542 1077-260X |
| Popis: | The efficiency limiting mechanisms in type-I GaInAsSb-based quantum well (QW) lasers, emitting at 2.3 μm, 2.6 μm and 2.9 μm, are investigated. Temperature characterization techniques and measurements under hydrostatic pressure identify an Auger process as the dominant non-radiative recombination mechanism in these devices. The results are supplemented with hydrostatic pressure measurements from three additional type-I GaInAsSb lasers, extending the wavelength range under investigation from 1.85-2.90 μm. Under hydrostatic pressure, contributions from the CHCC and CHSH Auger mechanisms to the threshold current density can be investigated separately. A simple model is used to fit the non-radiative component of the threshold current density, identifying the dominance of the different Auger losses across the wavelength range of operation. The CHCC mechanism is shown to be the dominant non-radiative process at longer wavelengths (> 2 μm). At shorter wavelengths (< 2 μm) the CHSH mechanism begins to dominate the threshold current, as the bandgap approaches resonance with the spin-orbit split-off band. |
| Databáze: | OpenAIRE |
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