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Experimental techniques

par Rowe Alistair - publié le , mis à jour le

Electrons-photons-surfaces is principally an experimental physics group, and a central aspect of our work concerns the design and build of novel experiments that allow us to explore physical phenomena in original ways.

A Sagnac interferometer in which the triangular loop is clearly visible.

In non-luminescent materials such as silicon the study of spin dynamics demands the use of non-standard experimental techniques. In addition to a low energy photoemission experiment coupled to a Mott detector, we have recently explored and implemented a variety of optical magnetometers including optical bridges using phase-generated-carrier techniques, and Sagnac interferometers capable of measuring Faraday rotations into the nanoradian range. For more information contact Alistair Rowe.

Clockwise from top left : Soleil, SLS, Flash and Elettra.

Time and Angular Resolved Photoelectron Spectroscopy experiments are performed in collaboration with scientist on Large Installations in France (TEMPO Beamline at SOLEIL) and abroad (ELETTRA and FERMI, Italy ; FLASH and XFEL, Germany ; SLS, Switzerland ; SPRING 8, Japan). For more information contact Fausto Sirotti.

Spin resolved, low energy photo-emission : developed during the 70s with the help of Murray Campbell, a UHV Mott detector facilitates the study of spin resolved electronic band structure.

Polarized microluminescence : developed very recently to facilitate the non-contact study of spin polarized electron transport in semiconductors.

The savoir-faire within the group is also used to help the research activities of the other groups within the laboratory via the maintenance and expertise of a number of commercial apparatus including :

  • Raman micro-spectroscopy

  • Optical microscopy

  • Fluorescence imaging