Reflectance measurements using a new far-infrared set-up (bibtex)
by Marko Scholze
Abstract:
A system capable of measuring the absolute value of the reflectance in the very far-infrared region (4-150 cm-1 has been set up. This region is of importance because it is in this region where low energy excitations can be seen in many materials and from which the optical properties can be extracted. The system consisting of a Martin-Puplett type polarizing interferometer and a Helium-3 cryostat who's sample stage has a temperature range from 0.5 K to 80 K will be described. In addition, improvements made to the system, such as an in situ gold evaporation will be illustrated. The system's error has been shown to be less than 1.5% by a reflectance measurement of stainless steel compared to the Hagen-Rubens fit. The usefulness of this new set-up is underlined by reflectance measurements of two different alkali halides. From the measurements the frequency of the transverse optic phonon mode has been obtained.
Reference:
Marko Scholze, "Reflectance measurements using a new far-infrared set-up", 1996.
Bibtex Entry:
@bachelorsthesis{1996S,
  title={Reflectance measurements using a new far-infrared set-up},
  author={Marko Scholze},
  month={August},
  year={1996},
  abstract={A system capable of measuring the absolute value of the reflectance in the very far-infrared
region (4-150 cm<sup>-1</sup> has been set up. This region is of importance because it is
in this region where low energy excitations can be seen in many materials and from which the
optical properties can be extracted. The system consisting of a Martin-Puplett type polarizing
interferometer and a Helium-3 cryostat who's sample stage has a temperature range from 0.5 K to 
80 K will be described. In addition, improvements made to the system, such as an <i>in situ</i>
gold evaporation will be illustrated. The system's error has been shown to be less than 1.5%
by a reflectance measurement of stainless steel compared to the Hagen-Rubens fit. The usefulness
of this new set-up is underlined by reflectance measurements of two different alkali halides. From
the measurements the frequency of the transverse optic phonon mode has been obtained.},
  note={Supervised by M. Reedyk}
}
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