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Ultraviolet–visible (UV–visible or UV–Vis) spectroscopy is an analytical technique that investigates the interaction between matter and UV–Vis light within the electromagnetic spectrum. This method is widely used for its versatility, simplicity, and relatively quick data acquisition, making it valuable for both qualitative and quantitative analysis. When UV–Vis radiation passes through a material,  molecules absorb light depending on the energy required for electronic transitions. As a result...
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The absorbance of UV and visible (UV–visible) radiations is measured using a UV–visible spectrophotometer. Deuterium lamps, which emit UV radiation, and tungsten lamps, which produce radiation in the visible region, are used as light sources in UV–visible spectrophotometers. A monochromator or prism is used for diffraction grating, i.e., to split the incoming radiation into different wavelengths. A system of slits is used to focus the desired wavelength on the sample cell. Samples for...

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A high resolution ultraviolet Brillouin scattering set-up.

F Bencivenga1, A Battistoni, D Fioretto

  • 1Sincrotrone Trieste S.C.p.A., S.S. 14 km 163,5 in AREA Science Park, I-34149 Basovizza, Italy. filippo.bencivenga@elettra.trieste.it

The Review of Scientific Instruments
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Summary

We developed a novel table-top setup for high-resolution inelastic ultraviolet (UV) scattering Brillouin measurements. This advanced system offers superior resolving power and contrast for low-frequency spectral analysis in the UV range.

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Area of Science:

  • Optics and Photonics
  • Materials Science
  • Spectroscopy

Background:

  • Brillouin scattering is a powerful technique for probing material properties.
  • Adapting interferometric techniques to the ultraviolet (UV) range presents unique challenges.
  • Existing UV Brillouin scattering instruments have limitations in resolution and low-frequency contrast.

Purpose of the Study:

  • To report on a novel table-top setup for high-resolution inelastic UV scattering Brillouin measurements.
  • To adapt a scanning Fabry-Perot interferometer for UV applications.
  • To demonstrate the advantages of the new system over existing UV Brillouin instruments.

Main Methods:

  • Utilized a tandem 1+1 pass scanning Fabry-Perot interferometer of Sandercock type.
  • Employed special optics to enable UV wavelength operation.
  • Performed comparative analysis with existing UV Brillouin scattering instruments.

Main Results:

  • The developed system achieves high resolution in inelastic UV scattering.
  • The setup demonstrates improved contrast in the low-frequency spectral region.
  • Comparative data validates the system's enhanced performance.

Conclusions:

  • The novel table-top setup is suitable for high-resolution UV Brillouin measurements.
  • The system offers significant advantages in resolving power and low-frequency contrast.
  • This advancement facilitates more detailed studies of materials using UV Brillouin spectroscopy.