The role of electric field polarization of the incident laser beam in the short pulse damage mechanism of pulse compression gratings

Jérôme Neauport 1 Steve Hocquet 1 Nicolas Bonod 2
1 CEA-CESTA - Commissariat à l'Energie Atomique et aux Energies Alternatives
2 CLARTE - CLARTE
FRESNEL - Institut FRESNEL
Abstract : We investigate the short pulse laser induced damage initiation mechanism on multilayer dielectric pulse compression gratings. We report that damages initiate at the edge of the grating pillars opposite to the incoming wave. It demonstrates, at a nanometer scale, the role of the electric field in the damage process coupled with periodic ripple pattern developing along the polarization direction. We avoid the formation of ripples by illuminating the diffraction grating in TM polarization and measure a significantly improved laser induced damage threshold associated with a strong decrease of the electric field in the grating structure
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Applied Physics Letters, American Institute of Physics, 2011, 99, pp.061101. 〈10.1063/1.3624832〉
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Jérôme Neauport, Steve Hocquet, Nicolas Bonod. The role of electric field polarization of the incident laser beam in the short pulse damage mechanism of pulse compression gratings. Applied Physics Letters, American Institute of Physics, 2011, 99, pp.061101. 〈10.1063/1.3624832〉. 〈cea-01623589〉

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