Journal
PHYSICAL REVIEW B
Volume 85, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.85.205128
Keywords
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Funding
- Kyoto University
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan
- Research Foundation for Opto-Science and Technology
- Murata Science Foundation
- [22109004]
- [22560041]
- Grants-in-Aid for Scientific Research [22109004, 22560041] Funding Source: KAKEN
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We study the dispersion relation of a metamaterial composed of metallic disks and bars arranged to have kagome symmetry and find that a plasmonic flat band is formed by the topological nature of the kagome lattice. To confirm the flat-band formation, we fabricate the metamaterial and make transmission measurements in the terahertz regime. Two bands formed by transmission minima that depend on the polarization of the incident terahertz beams are observed. One of the bands corresponds to the flat band, as confirmed by the fact that the resonant frequency is almost independent of the incident angle.
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