Strong and controllable circular dichroism (CD) is of great significance in enormous applications of life science. Here we have theoretically investigated the CD response in an Au split-ring resonator (SRR)/graphene nano-ribbon arrays on a metal substrate. The circular dichroism (CD) intensity in the proposed structure can approach 50%. Our theoretical investigation indicate that the strong CD is arisen from the symmetry breaking with the longitudinal plasmonic coupling in this hybrid system. More interestingly, we find that the strong optical CD can be very robust to the change of geometrical parameters of SRR and graphene nanoribbon as well as their vertical separation. Our design provides a new route for developing the compact and robust optical chiral devices in application of biochemical sensing and optical communication.
In this work, we theoretically investigate the strong coupling of Tamm Plasmon Polaritons (TPP) in a graphene/DBR/Ag hybrid structure. It is found that TPP can be generated at both upper graphene and lower Ag interfaces, which can strongly couple with each other, allowing strong light-matter interaction with dual-band perfect absorption. Numerical results reveal that resonance frequency of hybrid modes can be tuned by adjusting geometry parameters or dynamically modifying graphene Fermi energy. Coupling strength for the TPP hybrid modes exhibits a large tuning range, from large Rabi splitting to a very narrow induced transparency. The tunable TPP strong coupling with a dual-band perfect absorption in this simple layered system is potential in developing a broad range of graphene-based optoelectronic devices.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.