2025/08/13 by Joshi, Sukhad Dnyanesh, Bahulikar, Aditya, Wang, Feng +2
#FOS: Physical sciences #Optics (physics.optics)
paper · doi:10.48550/arxiv.2508.09901
Leveraging our structure-adaptive topology optimization framework based on the integration of the photonic density of states over a frequency window for the TM polarization of light [see A. Bahulikar et al., arXiv:2411.09165 (2025)], we show that the Γ-point and full Brillouin zone integration schemes can also recover two-dimensional photonic crystals for TE polarization. For the Γ-point formalism, we employ the scalar magnetic field formulation of the electromagnetic wave equation with independent sources polarized in the x and y directions. For the full Brillouin zone formalism, we employ the vector electric field formulation of the electromagnetic wave equation, again with independent sources polarized in the x and y directions. This work can simultaneously treat frequency-dependent optical response, allow for targeted optimization for a given frequency and reciprocal lattice vector pair, and inherently encourage binarized designs.