Abstract

A metal–graphene hybrid metasurface is proposed and numerically investigated for active tailoring of slow light in the terahertz (THz) regime. In the unit cell of the metasurface, four mirror-symmetrically arranged aluminum split ring resonators (SRRs) form the bright-dark-dark-bright mode coupling and exhibit a strong electromagnetically induced transparency (EIT) resonance characteristic. With monolayer graphene placed under the dark SRRs, both the transmission amplitude of EIT resonance and the group delay within the transparency window can be continuously tuned via shifting the Fermi level of graphene. Further theoretical analyses reveal that the active modulation arises from the increasing damping rate of the dark SRRs due to the recombination effect of the conductive graphene. The proposed metasurface provides an effective approach to tailoring the slow light effect and will find important applications in active functional devices for future THz wireless communications.

© 2019 Optical Society of America

Full Article  |  PDF Article
More Like This
Terahertz electric field modulated mode coupling in graphene-metal hybrid metamaterials

Shaoxian Li, Priyo S. Nugraha, Xiaoqiang Su, Xieyu Chen, Quanlong Yang, Márta Unferdorben, Ferenc Kovács, Sándor Kunsági-Máté, Meng Liu, Xueqian Zhang, Chunmei Ouyang, Yanfeng Li, József A. Fülöp, Jiaguang Han, and Weili Zhang
Opt. Express 27(3) 2317-2326 (2019)

Dynamic electromagnetically induced transparency based on a metal-graphene hybrid metamaterial

Chenxi Liu, Peiguo Liu, Cheng Yang, Yue Lin, and Song Zha
Opt. Mater. Express 8(5) 1132-1142 (2018)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (7)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription