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A mid-Infrared spectroscopy platform based on GaAs/AlGaAs thin-film waveguides and quantum cascade lasers

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Erstveröffentlichung
2016
DOI
10.18725/OPARU-6126
Wissenschaftlicher Artikel


Authors
Sieger, Markus
Haas, Julian
Jetter, Michael
Michler, Peter
Godejohann, Matthias
et al.
Faculties
Fakultät für Naturwissenschaften
Institutions
Institut für Analytische und Bioanalytische Chemie
Published in
Journal of Analytical Chemistry ; 88 (2016), 5. - S. 2558-2562. - ISSN 0003-2700. - eISSN 1520-6882
Link to original publication
https://dx.doi.org/10.1021/acs.analchem.5b04144
Peer review
ja
Document version
acceptedVersion
License
Standard
https://oparu.uni-ulm.de/xmlui/license_v3
Abstract
The performance and versatility of GaAs/AlGaAs thin-film waveguide technology in combination with quantum cascade lasers for mid-infrared spectroscopy in comparison to conventional FTIR spectroscopy is presented. Infrared radiation is provided by a quantum cascade laser (QCL) spectrometer comprising four tunable QCLs providing a wavelength range of 5–11 μm (1925−885 cm–1) within a single collimated beam. Epitaxially grown GaAs slab waveguides serve as optical transducer for tailored evanescent field absorption analysis. A modular waveguide mounting accessory specifically designed for on-chip thin-film GaAs waveguides is presented serving as a flexible analytical platform in lieu of conventional attenuated total reflection (ATR) crystals uniquely facilitating macroscopic handling and alignment of such microscopic waveguide structures in real-world application scenarios.
EU Project
MYCOSPEC / Novel infrared spectroscopic tools for mycotoxin determination in foodstuffs for increased food safety / EC / FP7 / 314018
Subject Headings
Quantenkaskadenlaser [GND]
MIR-Spektroskopie [GND]
Wellenleiter [GND]
Galliumarsenid [GND]
AlGaAs [GND]
Thin films [LCSH]
Wave guides [LCSH]
Gallium arsenide [LCSH]
Keywords
Mid-Infrared Spectroscopy; Quantum Cascade Lasers; GaAs/AlGaAs; Thin-film waveguides
Dewey Decimal Group
DDC 540 / Chemistry & allied sciences

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Sieger, Markus et al. (2018): A mid-Infrared spectroscopy platform based on GaAs/AlGaAs thin-film waveguides and quantum cascade lasers. Open Access Repositorium der Universität Ulm. http://dx.doi.org/10.18725/OPARU-6126

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