Sebastien Le Roy

  • Citations Per Year
Learn More
Low energy ion-beam sputtering of GaSb results in self-organized nanostructures with the potential of structuring large surface areas. Characterization of such nanostructures by optical methods is studied and compared to direct (local) microscopic methods. The samples consist of densely packed GaSb cones on bulk GaSb, approximately 30, 50, and 300 nm in(More)
Whereas synthetic materials have been used for long in the insulation of HVAC cables, their use in the case for HVDC applications is still pending due to a lack of knowledge on the behaviour of space charge and on their impact on the reliability of cables. As volatile cross-linking by-products are known to have an impact on space charge accumulation, it is(More)
More than fifty years after the publication of the early work on electrical transport in disordered insulating solids, we are still unable to describe quantitatively the electrical response of these materials. During this period of time, concepts derived from semiconductor physics have been transposed to the case of insulating solids, and among them, to(More)
The formation of GaSb nanopillars by low energy ion sputtering is studied in real-time by spectroscopic Mueller matrix ellipsometry, from the initial formation in the smooth substrate until nanopillars with a height of 200-300 nm are formed. As the nanopillar height increased above 100 nm, coupling between orthogonal polarization modes was observed. Ex situ(More)
  • 1