نتایج جستجو برای: near infrared laser

تعداد نتایج: 502129  

Journal: :Optics express 2007
Nanfang Yu Laurent Diehl Ertugrul Cubukcu Christian Pflügl David Bour Scott Corzine Jintian Zhu Gloria Höfler Kenneth B Crozier Federico Capasso

We report near field imaging of the transverse lasing modes of quantum cascade lasers. A mid-infrared apertureless near-field scanning optical microscope was used to characterize the modes on the laser facet. A very stable mode pattern corresponding to a TM(00) mode was observed as function of increasing driving current for a narrow active region quantum cascade laser. Higher order modes were o...

Journal: :Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy 2002
P Werle K Maurer R Kormann R Mücke F D'Amato T Lancia A Popov

Currently available semiconductor lasers for spectroscopy in the near- and mid-infrared region based on direct band-to-band transitions as gallium-arsenide, indium-phosphide, antimonides and lead-salt containing compounds will be discussed together with the main features of different tunable diode-laser absorption spectrometers for trace gas analysis. Measurements of atmospheric carbon dioxide ...

2010
Zahra Heidari Mojtaba Salouti Reyhaneh Sariri T Niidome

Gold nanorods have strong surface plasmon band at near-infrared light region, and are used as a photothermal converter. Since the near-infrared light penetrates into tissues deeply, it has been expected as a contrast agent for near infrared light bioimaging, a photosensitizer for photothermal therapy, and functional device for drug delivery system responding to near-infrared light irradiation. ...

2015
Isaac O. Afara Juuso T. Honkanen Elvis K. Danso Rami K. Korhonen Jukka S. Jurvelin Juha Töyräs E. K. Danso

Journal: :Journal of biomedical optics 2011
Tsukasa Funane Masashi Kiguchi Hirokazu Atsumori Hiroki Sato Kisou Kubota Hideaki Koizumi

The brain activity during cooperation as a form of social process is studied. We investigate the relationship between coinstantaneous brain-activation signals of multiple participants and their cooperative-task performance. A wearable near-infrared spectroscopy (NIRS) system is used for simultaneously measuring the brain activities of two participants. Each pair of participants perform a cooper...

Journal: :Journal of nonparametric statistics 2012
Guanqun Cao Lijian Yang David Todem

A polynomial spline estimator is proposed for the mean function of dense functional data together with a simultaneous confidence band which is asymptotically correct. In addition, the spline estimator and its accompanying confidence band enjoy oracle efficiency in the sense that they are asymptotically the same as if all random trajectories are observed entirely and without errors. The confiden...

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