geoscience.net logo
+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Indirect absorption spectroscopy using quantum cascade lasers: mid-infrared refractometry and photothermal spectroscopy


, : Indirect absorption spectroscopy using quantum cascade lasers: mid-infrared refractometry and photothermal spectroscopy. Optics Express 21(22): 25643-25654

We record vibrational spectra with two indirect schemes that depend on the real part of the index of refraction: mid-infrared refractometry and photothermal spectroscopy. In the former, a quantum cascade laser (QCL) spot is imaged to determine the angles of total internal reflection, which yields the absorption line via a beam profile analysis. In the photothermal measurements, a tunable QCL excites vibrational resonances of a molecular monolayer, which heats the surrounding medium and changes its refractive index. This is observed with a probe laser in the visible. Sub-monolayer sensitivities are demonstrated.

US$29.90

PMID: 24216789


Other references

Wilding, P., 1999: Medical decision making The laboratorys role. Clinical Chemistry & Laboratory Medicine 37(SPEC SUPPL ): S44, June

Stengaard, C.; Sørensen, J.Thorsted.; Ladefoged, Søren.Andreas.; Christensen, E.Frischknecht.; Lassen, J.Flensted.; Bøtker, H.Erik.; Terkelsen, C.Juhl.; Thygesen, K., 2013: Quantitative point-of-care troponin T measurement for diagnosis and prognosis in patients with a suspected acute myocardial infarction. Improvement of prehospital triage is essential to ensure rapid management of patients with acute myocardial infarction (AMI). This study evaluates the feasibility of prehospital quantitative point-of-care cardiac troponin T (POC-cTnT) analysis, it...

Ohl, F.; Michaelis, T.; Vollmann Honsdorf, G.K.; Kirschbaum, C.; Fuchs, E., 2000: Effect of chronic psychosocial stress and long-term cortisol treatment on hippocampus-mediated memory and hippocampal volume: A pilot-study in tree shrews. We investigated the impact of chronic psychosocial stress and long-term cortisol treatment on hippocampus-mediated memory processes and hippocampal volume in male tree shrews. By combining cognitive tests on a hole board, magnetic resonance imagin...

Runciman, A.M., 1973: What we need in international farm policy. Grain surpluses will probably continue to be a problem in the 1970s, resulting in depressed prices. The chief reasons are (a) lack of co-ordinated plans by developed countries to restrict production according to comparative advantage; (b) marketin...

Trueworthy, R.C.; Templeton, K.J., 2002: Malignant bone tumors presenting as musculoskeletal pain. Pediatric Annals 31(6): 355-359

Khan"mova T.K.; Donkova R.I.; Deribeeva D.B.; Dimitrova T.G., 1986: Influence of the chemical substances for weed extermination on the soil microflora in sowing of rougle cocksfoot. The herbicides chlorsulforon (gleen 75 WP-10 and 20g/ha), ethofumesat (nortron 20 EC-8 dm3/ha) and metabenzthyazuron (tribunyl 70 WP-3 kg/ha), used in a field planted with rougle cock's foot had been studied for their effect on the microflora...

Anderson, C.A.; Higgins, R.J.; Smith, M.E.; Sawyer, M.M.; Osburn, B.I., 1988: Hypomyelination in border disease: the roles of thyroid hormones, growth hormone, and virus infection of the CNS. Progress in Clinical and Biological Research 281: 59-70

Semke, E.; Distel, H.; Hudson, R., 1995: Specific Enhancement of Olfactory Receptor Sensitivity Associated with Foetal Learning of Food Odors in the Rabbit. Naturwissenschaften 82(3): 148-149

Erb, W.; Siede, W., 1973: Pancreas diagnosis using thin-layer chromatography analysis of fecal lipids. Medizinische Klinik 68(17): 550-554

Brown, C.L.; Oudekerk, B.A.; Szwedo, D.E.; Allen, J.P., 2014: Inter-Parent Aggression as a Precursor to Disengagement Coping in Emerging Adulthood: The Buffering Role of Friendship Competence. Using multi-informant data drawn from a prospective study involving 184 youth, mother perpetrated and father perpetrated partner aggression during early adolescence (age 13) was examined as a predictor of five types of disengagement coping strateg...