A photonic crystal surface-emitting laser (PCSEL) is a semiconductor laser in which a photonic crystal (PC) provides in-plane feedback and out-of-plane scattering.11. M. Imada, A. Chutinan, S. Noda, and M. Mochizuki, Phys. Rev. B 65, 195306 (2002). https://doi.org/10.1103/physrevb.65.195306 Laser oscillation occurs when light guided in-plane satisfies the second order Bragg diffraction condition, allowing large-area coherent emission.1,21. M. Imada, A. Chutinan, S. Noda, and M. Mochizuki, Phys. Rev.