Journal article
Broadband 2.4 μm superluminescent GaInAsSb/AlGaAsSb quantum well diodes for optical sensing of biomolecules
Semiconductor science and technology, Vol.29(11), p.115014
11/01/2014
DOI: 10.1088/0268-1242/29/11/115014
PMCID: PMC4283575
PMID: 25574065
Abstract
High power, high radiance, broadband light sources emitting in the 2.0-2.5 μm wavelength range are important for optical sensing of biomolecules such as glucose in aqueous solutions. Here we demonstrate and analyze superluminescent diodes with output centered at 2.4 μm (range ~2.2-2.5 μm) from GaInAsSb/AlGaAsSb quantum wells in a separate confinement structure. Pulsed wave output of 1 mW (38 kW/cm
2
/sr) is achieved at room temperature for 40μm × 2mm devices. Superluminescence is evidenced in superlinear increase in emission, spectral narrowing, and angular narrowing of light output with increasing current injection. Optical output is analyzed and modeled with rate equations. Potential routes for future improvements are explored, such as additional Auger suppression and photonic mode engineering.
Details
- Title: Subtitle
- Broadband 2.4 μm superluminescent GaInAsSb/AlGaAsSb quantum well diodes for optical sensing of biomolecules
- Creators
- M. B. Wootten - University of IowaJ. Tan - Optical Science and Technology Center, University of Iowa, Iowa City, IA 52242. Department of Physics and Astronomy, University of Iowa, Iowa City, IA 52242. Dept. of Chemistry, University of Iowa, Iowa City, IA 52242Y.J. Chien - University of IowaJ.T. Olesberg - University of IowaJ.P. Prineas - University of Iowa
- Resource Type
- Journal article
- Publication Details
- Semiconductor science and technology, Vol.29(11), p.115014
- DOI
- 10.1088/0268-1242/29/11/115014
- PMID
- 25574065
- PMCID
- PMC4283575
- ISSN
- 0268-1242
- eISSN
- 1361-6641
- Grant note
- DOI: 10.13039/100000002, name: National Insititutes for Health, award: R01 DK64569-01
- Language
- English
- Date published
- 11/01/2014
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984429018102771
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