Observation of gapless corner modes of photonic crystal slabs in synthetic translation dimensions
作者机构:School of Physics&State Key Laboratory of Optoelectronic Materials and TechnologiesSun Yat-sen UniversityGuangzhou 510275China
出 版 物:《Photonics Research》 (光子学研究(英文版))
年 卷 期:2024年第12卷第3期
页 面:444-455页
核心收录:
学科分类:08[工学] 0803[工学-光学工程] 0702[理学-物理学]
基 金:National Key Research and Development Program of China(2022YFA1404304) National Natural Science Foundation of China(12074443,12374364,62035016) Guangdong Basic and Applied Basic Research Foundation(2023B1515040023) Fundamental Research Funds for the Central Universities Sun Yat-sen University(23lgbj021)
主 题:translation dimensions corner
摘 要:Second-order topological photonic crystals support localized corner modes that deviate from the conventional bulk-edge ***,the frequency shift of corner modes spanning the photonic band gap has not been experimentally ***,we observe the gapless corner modes of photonic crystal slabs within a parameter space by considering translation as an additional synthetic *** corner modes,protected by topological pumping in synthetic translation dimensions,are found to exist independently of the specific corner *** gapless corner modes are experimentally imaged via the near-field scanning measurement and validated numerically by full-wave *** propose a topological rainbow with gradient translation,demonstrating the ability to extract and separate specific frequency components of light into different spatial *** work contributes to the advancement of topological photonics and provides valuable insights into the exploration of gapless corner modes in synthetic dimensions.