Ultra-narrow-band and highly efficient near-infrared absorption of a graphene-based Tamm plasmon polaritons structure

摘要

We theoretically propose a graphene-based Tamm plasmon polaritons (GTPP) structure to enhance the absorption of graphene in the near-infrared range. An ultra-narrow-band and highly efficient absorption can be realized based on Tamm plasmon polaritons (TPP) and critical coupling with guide resonances. Simulated results indicate that dramatic enhancement of graphene absorption with the help of the GTPP structure can be improved from 2.3% to near 75%, and the absorption of the GTPP structure can reach near 99% for both TM and TE polarizations. Furthermore, a further study reveals that the absorption peak of the GTPP structure can be adjusted by the geometry and incident angle, the absorption of the proposed GTPP structure possesses good wavelength selectivity and the full width at half-maximum of 2.5 nm can be acquired. The proposed GTPP structure shows tunability and favorable enhancement of graphene absorption and retains promising potential in graphene-based optoelectronic devices. Published by AIP Publishing.