Journal
MODERN PHYSICS LETTERS B
Volume 32, Issue 30, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217984918503669
Keywords
Chiral metasurface; circular dichroism; optical activity; negative refractive index; terahertz
Funding
- National Natural Science Foundation of China [61605147]
- Natural Science Foundation of Hubei province [2017CFB588]
- Science and Technology Research project of Education Department of Hubei province [D20181107]
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A novel chiral metasurface (CMS) based on T-shaped resonators is proposed and investigated numerically. The CMS is composed of a periodic array of bi-layered conjugated fourfold T-shaped structure. The retrieved effective electromagnetic (EM) parameters indicate that the multi-band negative refractive index associated with strong optical activity and circular dichroism (CD) effect is realized in terahertz (THz) region. The physical mechanism is illustrated by analyzing the current density distributions. Due to its exotic chiral optical properties, the proposed CMS is useful for the development of THz devices.
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