Spectroscopic Measurements – New High-Speed Method

Researchers have discovered a new method for faster spectroscopic measurements. They observed changes in the light spectrum by using simple, rapid polarization measurements by linking polarization to the color of a pulsed laser. The technique opens up new possibilities for measuring spectral changes over the complete color spectrum of light on a nanosecond time frame.

Spectroscopic measurements with the new technology consist of a change of wavelength of probe light (color) after interaction with a sample. Examination of these changes offers an opportunity to study the properties of materials at the atomic scale.

The researchers performed a modulation (using a birefringence crystal) in the temporal domain by coherently splitting a femtosecond pulse of a laser into two parts. Each part had a different polarization slightly delayed in time relative to each other. The new technique can find applications in material science research involving fundamental analysis of atoms and molecules and astronomical observations.

Read more