Journal article
High-power mid-wave infrared LED using W-superlattices and textured surfaces
Applied physics letters, Vol.118(7), p.71105
02/15/2021
DOI: 10.1063/5.0039269
Abstract
Efficient mid-infrared light output has been obtained 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 13.4 W/cm2-sr is achieved. Compared to the best published InAs/GaSb mid-IR LED, the maximum radiance is improved by 2.0×, while the wallplug efficiency improvement at the maximum radiance is improved >10×. For room temperature measurements on an un-thinned 400 μm diameter diode, the radiance (light output power) for a quasi-continuous wave and 1% duty cycle were 0.48 W/cm2-sr (2.4 mW) and 1.35 W/cm2-sr (6.8 mW), respectively. When compared to previous room temperature 4.2 μm LEDs, at a 1% duty cycle, this LED has optical powers that are 3× brighter. When compared to thermal emitters used in gas sensors, in the quasi-continuous wave, this LED uses 100× less energy per measurement.
Details
- Title: Subtitle
- High-power mid-wave infrared LED using W-superlattices and textured surfaces
- Creators
- D. A. Montealegre - University of IowaK. N. Schrock - University of IowaA. C. Walhof - BioVentures (United States)A. M. Muellerleile - University of IowaJ. P. Prineas - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Applied physics letters, Vol.118(7), p.71105
- DOI
- 10.1063/5.0039269
- ISSN
- 0003-6951
- eISSN
- 1077-3118
- Grant note
- DOI: 10.13039/100000183, name: Army Research Office, award: W900KK-17-C-0012
- Language
- English
- Date published
- 02/15/2021
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428840102771
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