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Proceedings Paper

All-dielectric diffraction grating for multi-petawatt laser systems
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Paper Abstract

All-dielectric grating with more than 98% efficiency over the reflective band of 40 nm with the central wavelength at 1053 nm is simulated for the angle of incidence 72 degrees. For the grating design we used the fact that chirped mirrors give wider reflective band than usual quarter-wavelength dielectric mirrors. Grating grooves and the very first layer under the grooves in our model is made of fused silica; underneath of the top layer we placed a chirped stack of 13 HfO2/SiO2 layers. Tolerances for groove depth and angle of incidence are estimated, optimal duty-cycle parameter is found out. Electric field distribution inside of the grating is also numerically studied. The model is simulated by two methods: numerical Fourier Modal Method in LightTrans Virtual Lab and semi-analytical Volume Integral Equation Method. The results obtained by both methods show excellent agreement.

Paper Details

Date Published: 7 January 2015
PDF: 5 pages
Proc. SPIE 9442, Optics and Measurement Conference 2014, 94421J (7 January 2015); doi: 10.1117/12.2086800
Show Author Affiliations
Stepan Vyhlidka, ELI-Beamlines (Czech Republic)
Charles Univ. in Prague (Czech Republic)
Galina Kalinchenko, ELI-Beamlines (Czech Republic)
Daniel Kramer, ELI-Beamlines (Czech Republic)
Alexander Lerer, Southern Federal Univ. (Russian Federation)
Bedrich Rus, ELI-Beamlines (Czech Republic)

Published in SPIE Proceedings Vol. 9442:
Optics and Measurement Conference 2014
Jana Kovačičinová; Tomáš Vít, Editor(s)

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