Results 61 to 70 of about 2,525,720 (184)

GaAs-chip-based mid-infrared supercontinuum generation

Light: Science & Applications, 2023
The mid-infrared spectral region opens up new possibilities for applications such as molecular spectroscopy with high spatial and frequency resolution. For example, the mid-infrared light provided by synchrotron sources has helped for early diagnosis of ...
Geoffroy Granger, Myriam Bailly, Hugo Delahaye, Cristian Jimenez, Idris Tiliouine, Yann Leventoux, Jean-Christophe Orlianges, Vincent Couderc, Bruno Gérard, Rezki Becheker, Said Idlahcen, Thomas Godin, Ammar Hideur, Arnaud Grisard, Eric Lallier, Sébastien Février   +15 more
doaj   +1 more source

Mid-infrared spectroscopy of the Andromeda galaxy [PDF]

Monthly Notices of the Royal Astronomical Society, 2015
We present Spitzer/Infrared Spectrograph (IRS) 5-21 micron spectroscopic maps towards 12 regions in the Andromeda galaxy (M31). These regions include the nucleus, bulge, an active region in the star-forming ring, and 9 other regions chosen to cover a range of mid-to-far-infrared colours. In line with previous results, PAH feature ratios (6.2 micron and
Hemachandra, D., Barmby, P., Peeters, E., Willner, S. P., Ashby, M. L.N., Smith, H. A., Gordon, K. D., Smith, D. A., Fazio, G. G.   +8 more
openaire   +3 more sources

Semiconductor optical fibres for nonlinear applications in the mid-infrared

, 2014
Nonlinear silicon photonics in the mid-infrared (mid-IR) is attracting increased interest with applications ranging from broadband telecommunications to sensing and spectroscopy.
Shen, L., Day, T.D., Peacock, A.C., Cheng, H.Y., Healy, N., Badding, J.V.   +5 more
core   +1 more source

Cavity-Enhanced Frequency Comb Vernier Spectroscopy

Photonics, 2022
Vernier spectroscopy is a frequency comb-based technique employing optical cavities for filtering of the comb and for enhancement of the interaction length with the sample.
Chuang Lu, Jerome Morville, Lucile Rutkowski, Francisco Senna Vieira, Aleksandra Foltynowicz   +4 more
doaj   +1 more source

Portable high-end instrument for in-vivo infrared spectroscopy using spread spectrum modulation [PDF]

, 2004
Near infrared spectroscopy (NIRS) can be employed to monitor noninvasively and continuously local changes in hemodynamics and oxygenation of human tissues.
Trevisan, S., Giardini, M.E.
core   +4 more sources

Frequency chirped Fourier-Transform spectroscopy

Communications Physics, 2023
Fast and high-resolution Fourier transform spectrometers are indispensable for cutting-edge infrared spectroscopy. In this study, the authors employed a newly-designed fast-rotating retroreflective, broadband delay line demonstrating fast dual-comb ...
Sergej Markmann, Martin Franckié, Mathieu Bertrand, Mehran Shahmohammadi, Andres Forrer, Pierre Jouy, Mattias Beck, Jérôme Faist, Giacomo Scalari   +8 more
doaj   +1 more source

Optical gas sensing: a review [PDF]

, 2013
The detection and measurement of gas concentrations using the characteristic optical absorption of the gas species is important for both understanding and monitoring a variety of phenomena from industrial processes to environmental change.
Hodgkinson, Jane, Tatam, Ralph P.
core   +1 more source

Spectroscopic imaging of biological tissue components by non-contact optical scanning based on the detection of ultrasound induced by mid-infrared laser radiation

Applied Physics Express
A biological spectral imaging system based on photoacoustic spectroscopy is proposed for real-time in vivo measurements of biological samples. The system irradiates biological samples with mid-infrared laser light modulated at several hundred kilohertz ...
Nozomi Tanaka, Yuji Matsuura
doaj   +1 more source

Soil Classification Via Mid-infrared Spectroscopy [PDF]

, 2008
The need for rapid and inexpensive techniques for soil characterization has led to the investigation of modern technologies, and in particular those based on reflectance spectroscopy. While near-infrared has been traditionally used, midinfrared in the 400-4000 cm-1 range is becoming increasingly common due to the specificity of the absorbance bands in ...
openaire   +2 more sources

Complex refractive index spectra of whole blood and aqueous solutions of anticoagulants, analgesics and buffers in the mid-infrared

Scientific Reports, 2017
Mid-infrared (MIR) spectroscopy is a powerful tool for characterising the vibrations of molecular bonds and is therefore ideal for label-free detection of chemical species. Recent research into thin-film deposition and etching techniques for mid-infrared
David J. Rowe, David Smith, James S. Wilkinson   +2 more
doaj   +1 more source