Fig. 3: Analytical blazing model.
From: Twist-Induced Beam Steering and Blazing Effects in Photonic Crystal Devices
a Scheme of the reduced structural model. b Field map for Y polarization with only one layer on a substrate of index \({n}_{2}\). c Field map for Y polarization with both layers twisted by an angle \(\alpha =2{0}^{\circ }\) in air. d The diffraction angle from the grating Eq. (3) compared to the blazing angle formula (8). On a second axis, the diffraction efficiency is shown for our reduced model and RCWA simulations of optimized ellipses archetype and a parallelogram with the obtained optimal slant. e The figure of merit for different slant angles computed using our model compared to RCWA simulations for the different twist angles
