講演情報
[15a-K505-1]Investigation of flat bands in bilayer one-dimensional moiré photonic crystals with staggered potential (III)
〇(D)Stepan Maksimovich Trushin1, Yuki Ishii1, Takahiro Ito1, Satoshi Iwamoto2, Yasutomo Ota1 (1.Keio Univ., 2.RCAST, Tokyo Univ.)
キーワード：
Moire、Photonic crystal、Numerical analysis
Moiré photonic crystals (PhCs) offer novel ways to control the light and have led to various exciting phenomena including flat band light localization [1]. One dimensional (1D) moiré bilayer PhCs are a simple but profound platform supporting moiré flat band modes with tight spatial confinement [2]. Previously, we investigated moiré bilayer PhCs with staggered potential, which was implemented by double periodic perturbation of each PhC layer [3] and observed moiré flat bands robustly appeared in the frequency range of the second bandgaps of the individual PhCs. In this work, we extended our study to optical modes emerged in the first band gap of the PhC and found that the introduction of the staggered potential leads to flat band localization in a wide parameter space.
[1] X. R. Mao, et al., Nat. Nanotechnol. 16, 1099 (2021).
[2] S. Chirine, et al., Optica 11, 245-250 (2024).
[3] S.M. Trushin, et. al., JSAP Autumn, 17p-A34-8 (2024).
[1] X. R. Mao, et al., Nat. Nanotechnol. 16, 1099 (2021).
[2] S. Chirine, et al., Optica 11, 245-250 (2024).
[3] S.M. Trushin, et. al., JSAP Autumn, 17p-A34-8 (2024).