Spectroscopy

Raman, NIR, IR Spectroscopy

Studying the spectral behavior of a material when exposed to a wide band of radiation is a fundamental experimental tool for understanding it’s intrinsic properties and potential uses. ARS builds cryostats that are tailored to the key needs of these sensitive experiments and improve data output with low temperatures, high vacuum, and ultra-low vibrations.

Mössbauer Spectroscopy 

Cryogenic Mössbauer Spectroscopy directs a beam of gamma radiation onto a cold sample. This will reveal novel behavior with narrow spectral bands such as isomer shift, magnetic hyperfine splitting, and quadrapole splitting.

Exposing the sample to a high power magnetic field will help to further reveal hyperfine splitting of spectral peaks into sextets, achieved with superconducting magnets that can be integrated into the cryostat.

This is a very sensitive technique that requires minimal mechanical vibrations and high dimensional stability while focusing the beam on the sample. This can be achieve using ultra-low vibration cryostats such as the µDrift, Helitran, or Omniplex cryostats from ARS.

Angle-Resolved Photoemission Spectroscopy (ARPES)

ARPES uses x-rays fired at a sample to observe the surface structure a solid as the excited particles escape from the sample and are collected by a electron detector. Cooling the sample will minimize thermal broadening of the spectral peaks during the experiment.

Using an angle resolved setup is useful particularly for studying the surfaces of 2d materials where the reflection angles are nearly parallel to the surface.

High Quality vacuum, up to UHV bakeable chambers are essential for maintaining surface and detector cleanness. The light source is generally directed from a laser or synchotron.