Measurement of recombination mechanisms in mid-infrared W-superlattices

Article Engineering, Electrical & Electronic

Comparison of Auger Coefficients in Type I and Type II Quantum Well Midwave Infrared Lasers

Jerry R. Meyer et al.

Summary: A detailed comparison of 2D Auger coefficients in narrow-gap type-I and type-II quantum wells was conducted, along with the relative effects of Auger non-radiative decay on midwave infrared lasers using both types of gain media. The findings suggest that the Auger recombination in both types of QW is substantially suppressed compared to bulk materials. Additionally, the study reveals that T1QWs exhibit significantly lower Auger coefficients than T2QWs, indicating a potential impact on the lasing threshold.

IEEE JOURNAL OF QUANTUM ELECTRONICS (2021)

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Article Physics, Applied

High-power mid-wave infrared LED using W-superlattices and textured surfaces

D. A. Montealegre et al.

Summary: Efficient mid-infrared light output has been achieved by incorporating a W-superlattice into a cascaded mid-infrared LED structure and by thinning and roughening of the emission side of the structure. At cryogenic temperatures, a radiance of around 13.4W/cm(2)-sr is achieved, with substantial improvements in maximum radiance and wallplug efficiency compared to previous InAs/GaSb mid-IR LED. Room temperature measurements also show significant improvements in radiance and optical power compared to previous LEDs, with much lower energy consumption in gas sensor applications.

APPLIED PHYSICS LETTERS (2021)

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Article Physics, Applied