7 January 2015 All-dielectric diffraction grating for multi-petawatt laser systems
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Proceedings Volume 9442, Optics and Measurement Conference 2014; 94421J (2015) https://doi.org/10.1117/12.2086800
Event: Optics and Measurement Conference 2014, 2014, Liberec, Czech Republic
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.
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Stepan Vyhlidka, Stepan Vyhlidka, Galina Kalinchenko, Galina Kalinchenko, Daniel Kramer, Daniel Kramer, Alexander Lerer, Alexander Lerer, Bedrich Rus, Bedrich Rus, "All-dielectric diffraction grating for multi-petawatt laser systems", Proc. SPIE 9442, Optics and Measurement Conference 2014, 94421J (7 January 2015); doi: 10.1117/12.2086800; https://doi.org/10.1117/12.2086800

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