[10p-N221-1~10] 3.10 Photonic structures and phenomena

2:00 PM - 2:15 PM JST(5:00 AM - 5:15 AM UTC)

[10p-N221-3] Mode modulation of photonic crystal resonators using the phase-change material Sb₂Se₃.

〇Keiju Iwatani^1,2, Takahiro Uemura^1,2, Yuto Moritake¹, Eiichi Kuramochi^2,3, Hisashi Sumikura^2,3, Masaya Notomi^1,2,3 (1.Science Tokyo, 2.NTT BRL, 3.NTT NPC)

Keywords:

photonic crystal,photonic crystal resonator,phase change material

Photonic crystal resonators can achieve significant mode modulation even with slight perturbations, making them promising candidates for low-loss, highly integrated optical switches and non-volatile memory applications. In this study, by using Sb₂Se₃—a transparent phase-change material with an extinction coefficient on the order of 10^-3 or less in both its amorphous and crystalline phases—we successfully modulated the resonant mode while maintaining a high Q-factor before and after the phase transition. Compared to previous studies, this approach achieved superior performance in preserving a high Q-factor across phase changes.