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Mid-infrared surface transmitting and detecting quantum cascade device for gas-sensing

Overview of attention for article published in Scientific Reports, February 2016
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Title
Mid-infrared surface transmitting and detecting quantum cascade device for gas-sensing
Published in
Scientific Reports, February 2016
DOI 10.1038/srep21795
Pubmed ID
Authors

Andreas Harrer, Rolf Szedlak, Benedikt Schwarz, Harald Moser, Tobias Zederbauer, Donald MacFarland, Hermann Detz, Aaron Maxwell Andrews, Werner Schrenk, Bernhard Lendl, Gottfried Strasser

Abstract

We present a bi-functional surface emitting and surface detecting mid-infrared device applicable for gas-sensing. A distributed feedback ring quantum cascade laser is monolithically integrated with a detector structured from a bi-functional material for same frequency lasing and detection. The emitted single mode radiation is collimated, back reflected by a flat mirror and detected by the detector element of the sensor. The surface operation mode combined with the low divergence emission of the ring quantum cascade laser enables for long analyte interaction regions spatially separated from the sample surface. The device enables for sensing of gaseous analytes which requires a relatively long interaction region. Our design is suitable for 2D array integration with multiple emission and detection frequencies. Proof of principle measurements with isobutane (2-methylpropane) and propane as gaseous analytes were conducted. Detectable concentration values of 0-70% for propane and 0-90% for isobutane were reached at a laser operation wavelength of 6.5 μm utilizing a 10 cm gas cell in double pass configuration.

Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 44 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Germany 2 5%
Unknown 42 95%

Demographic breakdown

Readers by professional status Count As %
Student > Ph. D. Student 20 45%
Researcher 6 14%
Student > Master 4 9%
Student > Bachelor 3 7%
Professor > Associate Professor 3 7%
Other 4 9%
Unknown 4 9%
Readers by discipline Count As %
Physics and Astronomy 18 41%
Engineering 11 25%
Chemistry 5 11%
Materials Science 4 9%
Chemical Engineering 1 2%
Other 0 0%
Unknown 5 11%