Petrov, N I, V A Danilov, V V Popov, and B A Usievich. “Resonance Absorption of Light By Subwavelength Diffractive Gratings”. KnE Energy 3, no. 3 (April 25, 2018): 249–258. Accessed July 30, 2021. https://knepublishing.com/index.php/KnE-Energy/article/view/2035.