Rudy Desmarchelier

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Recently, we showed that femtosecond laser induced " nanogratings " consist of thin regions with a low refractive index (Δn = −0.15), due to the formation of nanoporous silica surrounded by regions with a positive index change. In this paper, we investigate a wide range of laser parameters to achieve very high retardance within a single layer; as much as(More)
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