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Konstruktion und Inbetriebnahme einer Xe-Zelle zur Vierwellenmischung

Master thesis (M.Sc.), Bachelor thesis (B.Sc.), Internship (M.Sc.)

Motivation

Due to their properties, dyes are only suitable for emitting light in the visible range. With the help of sum frequency mixing in nonlinear media, it is possible to penetrate into deep UV ranges. However, the BBO crystals commonly used for this purpose are limited to the so-called phase-matching angle. A crystal can only be manufactured for a certain angle, on which it can then be operated with a deviation of about 10° in both directions. In addition, the transmission of the crystal breaks down sharply below 200nm and use below 190nm is not possible.

Now, however, the ionization potentials of many metal clusters are in the 160-180nm range, so another nonlinear medium must be used for wave mixing. The possible alternatives are krypton and xenon, with xenon being more suitable for the 150-190nm wavelength range due to its absorption lines. The goal of this work is to design and commission a Xe gas cell that can be easily incorporated into the existing experiment to achieve the desired wavelengths.

Description of the work

Within the scope of this work the following objectives shall be achieved:

  • Elaboration of a concept for four-wave mixing and separation in nonlinear media.
  • Implementation of the elaborated concept into the existing experiment
  • Investigation of different cluster species with the new achievable photon energies.

Recommended knowledge

  • Understanding of the content of the basic lectures in physical chemistry.
  • Willingness to learn a new, diverse subject area
  • Interest in 3D modeling and implementation into reality

Publications