Abstract
We present two Fano-type resonances from a single set of paired split-ring resonators (SRRs) with broken structural symmetry in the mid-infrared regions. These paired SRR metamaterials are designed by the planar integration of two geometry-different SRRs, referred to as inner SRRs and outer SRRs, where the interplay of these two SRR elements constitute two Fano-type resonances at 7.4 μm and 2.8 μm, respectively. Investigations of their sensing characteristics are carried out systematically, indicating that these SRR-based sensors can be realized using the shift of resonance wavelength in response to the refractive-index (RI) change with remarkable sensitivity. Furthermore, evolution of the sensing performances is performed by separately investigating the spatial positions of the RI sensors, where the position-dependent sensing characteristics are numerically evidenced. It is found that the most active region for possessing RI sensing is located inside the inner SRR components in these coupled SRR-based sensors. In-depth studies of these dual-band coupled resonances are anticipated to benefit the development of RI sensing designs.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
