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Researchers at Tampere University and their collaborators have shown how the speed of spectroscopic measurements can be made much faster. By correlating polarization to the color of a pulsed laser, the researchers tracked changes in the spectrum of the light by simple and extremely fast polarization measurements. The method opens new possibilities to measure spectral changes on a nanosecond timescale over the entire color spectrum.
Spectroscopic measurements usually rely on separating the different color components to different positions, where the spectrum can then be read out by a detector array. While this approach enables a direct inspection of the spectrum, it is rather slow due to the limited speed of the large read-out array….READ MORE