We observed the intimate structure of nanogratings made up by femtosecond laser-irradiation. We reveal that nanoplans are meso-porous glass-layers that are at the root of the strong-refractive index-contrast. Nanopores formation is likely due to glass-decomposition.
© 2010 The Optical Society
M. Lancry, F. Brisset, and B. Poumellec, "In the Heart of Nanogratings Made up During Femtosecond Laser Irradiation," in Advanced Photonics & Renewable Energy, OSA Technical Digest (CD) (Optical Society of America, 2010), paper BWC3.
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