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- W1967715948 abstract "Abstract We report the fabrication of efficient, buried diffraction gratings and micro-craters in bulk polystyrene using femtosecond laser direct writing technique. We recorded a maximum diffraction efficiency of 10% for a buried grating fabricated at 1 μJ energy, 1 mm/s speed, and a period of 30 μm. Buried micro-craters, with typical dimensions of ∼2 μm, were achieved at low energies and high scanning speeds. From the field emission scanning electron microscope studies, the observed emission is attributed as due to the inner surface modifications and the debris settled around the voids. The fabricated gratings subjected to heat treatment were tested for the diffraction efficiency and emission at different excitation wavelengths and the observed results are presented. Raman spectra collected from the femtosecond laser modified regions revealed the disappearance of few Raman modes at high peak intensities associated with incident Gaussian laser pulse. Potential applications of these luminescent micro-craters are highlighted." @default.
- W1967715948 created "2016-06-24" @default.
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- W1967715948 date "2011-09-01" @default.
- W1967715948 modified "2023-09-23" @default.
- W1967715948 title "Effects of thermal treatment on femtosecond laser fabricated diffraction gratings in polystyrene" @default.
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- W1967715948 doi "https://doi.org/10.1016/j.apsusc.2011.05.019" @default.
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