Many atoms and molecules have distinct absorption lines in the 1,200–2,300-nm wavelength range. Optical absorption spectroscopy using various laser sources has been demonstrated to be a useful ...

When a gas is very hot, it doesn’t emit all wavelengths of light. Hot gases don’t produce a continuous emission spectrum. Black hydrogen absorption lines are at the same wavelength as the ...

Each colour within the visible light spectrum has its own narrow band of wavelength and frequency. When white light passes through a coloured filter, all colours are absorbed except for the colour ...

This work reports the design of an efficient multiband UC system based on Ln3+/Yb3+-doped core-shell upconversion ...

The intensity of these wavelengths is measured by detectors, which help analyze the optical properties of the sample based on its absorption and reflectance of light across different wavelengths. This ...

Researchers from Tokyo Metropolitan University have developed a new dye that can strongly absorb second near-IR radiation and ...

It measures the absorption of infrared light by a sample at different wavelengths to produce a spectrum that provides information about the sample's molecular structure and composition. Schematic ...

While the light is severely attenuated due to the scattering and absorption processes, it is nonetheless encoded with the spectroscopic signatures of the molecules encountered en route to the detector ...

Through a series of experiments in transmittance and reflectance measurements, the team found that the solar cell had a broad ...

Coherent (COHR) introduces a new high-power F-theta lens for additive manufacturing, EV battery welding and laser cleaning. The new lens ...