[11p-B11-1~14] 3.10 Photonic structures and phenomena

4:30 PM - 4:45 PM JST(7:30 AM - 7:45 AM UTC)

[11p-B11-13] Robustness of Q factor against random rotation of square holes in photonic crystal slab nanocavities

〇Eiichi Kuramochi^1,2, Shota Kita^1,2, Hisashi Sumikura^1,2, Masaya Notomi^1,2 (1.NTT BRL, 2.NTT NPC)

Keywords:

Photonic Crystal,Optical Cavity,Silicon Photonics

Photonic crystal nanocavities are known to be highly sensitive to nanometer-scale fluctuations in the dimensions and positions of air holes, which can significantly degrade the cavity quality factor (Q). In this work, we investigate an L3 photonic crystal nanocavity in which the circular air holes are replaced by square holes with strong in-plane anisotropy, and random rotational perturbations are introduced to each hole. Electromagnetic simulations based on the finite-element method reveal that the cavity factor exhibits remarkable robustness against such random hole rotations. We will report this unexpected robustness and discuss its physical origin.