Abstract

To achieve frequency-tunable angular selectivity at terahertz frequencies, a tunable epsilon-near-zero (ENZ) metamaterial based on a subwavelength dielectric-graphene multilayer structure is designed. The ENZ frequency of the dielectric-graphene multilayer can be dynamically tuned by the gate voltage applied to graphene. Transmittance angular spectra show that only the incident lights close to normal incidence can propagate through the structure while other incident lights cannot, which indicates that our structure can be utilized for frequency-tunable terahertz angular selection. The optimal directivity $ D $ reaches 183 and the transmittance at normal incidence reaches 0.462. This multilayer-based tunable terahertz ENZ metamaterial will possess potential application prospects in tunable highly directive antennas.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Tunable broadband terahertz absorber based on multilayer graphene-sandwiched plasmonic structure

Yijun Cai and Kai-Da Xu
Opt. Express 26(24) 31693-31705 (2018)

Tunable deflection and asymmetric transmission of THz waves using a thin slab of graphene-dielectric metamaterial, with and without ENZ components

Andriy E. Serebryannikov, Hodjat Hajian, Miguel Beruete, Ekmel Ozbay, and Guy A. E. Vandenbosch
Opt. Mater. Express 8(12) 3887-3898 (2018)

Tunable multilayer-graphene-based broadband metamaterial selective absorber

Xinpeng Jiang, Zhaojian Zhang, Dingbo Chen, Kui Wen, and Junbo Yang
Appl. Opt. 59(35) 11137-11145 (2020)

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 Optica member, or as an authorized user of your institution.

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

Data Availability

Data underlying the results presented in this paper are not publicly available at this time but may be obtained from the authors upon reasonable request.

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 Optica member, or as an authorized user of your institution.

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

Figures (6)

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

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

Equations (8)

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

Contact your librarian or system administrator
or
Login to access Optica 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 Optica member, or as an authorized user of your institution.

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