Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
Journal Home About Tutorials Issues in Progress Current Issue All Issues Early Posting Feature Issues

Exceptional points in chiral metasurface based on graphene strip arrays

Jinyang Li, Jie Fu, Qing Liao, and Shaolin Ke

Not Accessible

Your library or personal account may give you access

Abstract

We investigate the exceptional points (EPs) in chiral metasurfaces composed of periodic arrays of two orthogonally orientated graphene strips in the terahertz frequency. By tuning the geometric parameters and incident wavelengths, the EPs emerge as two eigenvalues of the transmission matrix coalesce. The EPs possess a certain chirality as light at the output is completely left- or right-handed circularly polarized (LCP or RCP). The chirality of the EPs is determined by the sign of two displacements of graphene strips along the horizontal and vertical directions, that is, RCP for the same sign and LCP for different signs. In addition, we show that the chirality of EPs is reversed when light is incident from the opposite direction of the metasurface. This study may have potential applications in polarization detection, manipulation, and ultrasensitive sensing by taking advantage of the non-Hermiticity present in the system.

© 2019 Optical Society of America

Full Article  |  PDF Article

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 (4)

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

Select as filters
Select Topics Cancel
Top
       
© Copyright 2024 | Optica Publishing Group. All rights reserved, including rights for text and data mining and training of artificial technologies or similar technologies.
Privacy | Terms of Use