Jaroszewicz, Zbigniew, Eugeniusz Czech, and Tomasz Osuch. “Diffractive Gratings With Varying period’s Shape”. Photonics Letters of Poland 11, no. 2 (July 1, 2019): 41–43. Accessed May 2, 2024. https://www.photonics.pl/PLP/index.php/letters/article/view/11-14.