Personal Information
- (Professor)
Gender:
MaleDiscipline:
Acoustics. Optics. Condensed Matter PhysicsEducation Level:
With Certificate of Graduation for Doctorate StudyDiscipline:
1 Acoustics;
1 Optics;
1 Condensed Matter Physics
Other Contact Information
-
ZipCode
430072 -
PostalAddress
School of Physics and Technology, D303 -
email
phmxiao@whu.edu.cn
Publications
Current position: English > Research > Publications
Fully Flat Bands in a Photonic Dipolar Kagome Lattice
- Time:2026-03-16
- Hits:
-
Journal:
Physical Review Letters -
Abstract:
Flat bands, characterized by zero group velocity and strong energy localization, enable interaction-enhanced phenomena across both quantum and classical systems. Existing photonic flat-band implementations were limited to evanescent-wave systems, specific lattice symmetries, or complex supercell modulations. A simple, universal, and efficient approach to realizing flat bands without dedicated source excitation is yet to be explored. Here, inspired by geometrically frustrated configurations, we theoretically proposed and experimentally demonstrated threefold-degenerate flat bands by integrating orbital and rotational degrees of freedom in a photonic dipolar kagome lattice. By rotating the dipole orientation, the system exhibits a band flip transition at which point all bands achieve complete flatness and degeneracy across the entire Brillouin zone. In contrast to conventional ��-orbital kagome lattices with only a single flat band, our approach flattens the entire band structure, eliminating dispersive modes and enabling compatibility with arbitrary excitations. These results establish a new mechanism for flat-band engineering, offering a tunable strategy for enhancing light-matter interactions and may have applications in compact photonic devices and energy-efficient information processing. -
Volume:
135 -
Issue:
17 -
Page Number:
176902 -
Translation or Not:
no -
Date of Publication:
2025-10-24