Strong circular dichroism generation in an Au SRR/graphene nanoribbon arrays plasmonic hybrid system

Yuxi Xiao; Leiming Zhou; Wu Fei; Wei Qiu; Wei Zhang; Fei Wang; Zhili Wang; Jigang Hu

doi:10.1117/12.2601483

9 October 2021 Strong circular dichroism generation in an Au SRR/graphene nanoribbon arrays plasmonic hybrid system

Yuxi Xiao, Leiming Zhou, Wu Fei, Wei Qiu, Wei Zhang, Fei Wang, Zhili Wang, Jigang Hu

Proceedings Volume 11904, Plasmonics VI; 1190415 (2021) https://doi.org/10.1117/12.2601483
Event: SPIE/COS Photonics Asia, 2021, Nantong, JS, China

Abstract

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.

Citation Download Citation

Yuxi Xiao, Leiming Zhou, Wu Fei, Wei Qiu, Wei Zhang, Fei Wang, Zhili Wang, and Jigang Hu "Strong circular dichroism generation in an Au SRR/graphene nanoribbon arrays plasmonic hybrid system", Proc. SPIE 11904, Plasmonics VI, 1190415 (9 October 2021); https://doi.org/10.1117/12.2601483

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KEYWORDS

Graphene

Gold

Absorption

Dichroic materials

Plasmonics

Erbium

Metals

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