Article ID Journal Published Year Pages File Type
1687790 Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 2007 5 Pages PDF
Abstract

Proton Beam Writing has been successfully used to create buried channel waveguides in PMMA, which suggested that proton irradiation increases the refractive index. To investigate this effect, PMMA samples were irradiated by 1.7–2.1 MeV proton beam. Spectroscopic ellipsometry has been used to investigate the depth profile of the refractive index. An increase of the refractive index was observed in the order of 0.01, which is approximately one order of magnitude higher than the detection limit. The highest increase of the refractive index occurs at the end of range, i.e. we found a good correlation with the Bragg curve of the energy loss.

Related Topics
Physical Sciences and Engineering Materials Science Surfaces, Coatings and Films
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