Observation of photonic chiral edge states in penrose quasicrystals

Yang, Xucheng1; Wang, Ziyao1; Gao, Hengjun1; Yang, Linyuan1; Meng, Yan1; Xi, Xiang1,2; Shum, Perry Ping; Gao, Zhen1

2024-06-01

10.1364/OME.524390

OPTICAL MATERIALS EXPRESS   影响因子和分区

2159-3930

Photonic chiral edge states with one-way propagation and robust topological protection are hallmark features of photonic Chern insulators. To date, photonic chiral edge states have been observed in two-dimensional (2D) periodic and amorphous gyromagnetic photonic crystals. Recent theoretical studies reveal that photonic chiral edge states can also exist in 2D Penrose quasicrystals with long-range order but lack translational symmetry. Here, we report the first experimental observation of photonic chiral edge states in a 2D Penrose -tiled gyromagnetic photonic quasicrystal. By using microwave measurements, we observe a complete photonic band gap in the Penrose photonic quasicrystal despite the absence of bulk Bloch bands in momentum space. Moreover, we directly observe unidirectional backscattering-immune photonic chiral edge states within the photonic bandgap of the 2D Penrose quasicrystal. These results broaden our understanding of photonic chiral edge states and provide a new platform for exploring the intriguing properties of topological photonic quasicrystals.

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China["62375118,6231101016,12104211","12304484"] ; Science, Technology and Innovation Commission of Shenzhen Municipality[20220815111105001] ; Southern University of Science and Technology["Y01236148","Y01236248"]

Materials Science ; Optics

Materials Science, Multidisciplinary ; Optics

WOS:001249039900003

Optica Publishing Group

Web of Science

1.Southern Univ Sci & Technol, Dept Elect & Elect Engn, State Key Lab Opt Fiber & Cable Mfg Technol, Guangdong Key Lab Integrated Optoelect Intellisens, Shenzhen 518055, Peoples R China
2.Dongguan Univ Technol, Sch Elect Engn & Intelligentizat, Dongguan 523808, Peoples R China

Yang, Xucheng,Wang, Ziyao,Gao, Hengjun,et al. Observation of photonic chiral edge states in penrose quasicrystals[J]. OPTICAL MATERIALS EXPRESS,2024,14(6).

Yang, Xucheng.,Wang, Ziyao.,Gao, Hengjun.,Yang, Linyuan.,Meng, Yan.,...&Gao, Zhen.(2024).Observation of photonic chiral edge states in penrose quasicrystals.OPTICAL MATERIALS EXPRESS,14(6).

Yang, Xucheng,et al."Observation of photonic chiral edge states in penrose quasicrystals".OPTICAL MATERIALS EXPRESS 14.6(2024).