A near-infrared photodetector detects the pulses. The inset in the bottom left corner shows the transmittance spectra of gaseous CH4 molecules at three consecutive time points.

Schematic representation of infrared spectroscopy. First, a beam of IR light from the source is split into two and passed through the reference and the sample respectively. Now, both of these beams ...

Vibrational sum-frequency generation (VSFG) is a nonlinear spectroscopic method widely used to investigate the molecular structure and dynamics of surface systems. However, in far-field observations, ...

Schematic representation of the processes occurring with ... neither of which are user-friendly. Scientists often utilize infrared spectroscopy to see if certain functional groups are present in a ...

Schematic of FluidScan hardware ... with a result that detecting 100 ppm of water in oil is possible by using infrared spectroscopy. In order to achieve equivalency to FTIR for in-service oil analysis ...

Infrared spectroscopy is especially important in ... which is read by a detector and analyzer circuit or computer. Fifty years ago the best tools could measure one spectra per second, and for ...

Nevertheless, certain solid or semisolid samples may be analyzed directly with atomic absorption spectrometry (by using electrothermal atomization) Infrared spectroscopy is also a significant ...

A multi-institutional team of optoelectronic and materials engineers in China has developed a type of metamaterial that is nearly invisible across visible light, microwave and infrared spectra.