Phys.org  January 6, 2022 An international team of researchers (USA – UC Santa Barbara, China) designed and fabricated a multiscale nanobridged rhombic antenna that supported two dominant resonances in the charge-transfer plasmon (CTP) band and a bridged dipolar plasmon (BDP) band which looks like a quadruple resonance. Compared with other nanobridged structures, such as nanobridged-disks or rectangles, the nanobridged rhombic antenna (NBRA ) shows distinct multiband resonances in the mid-infrared region in the simulated extinction spectra. The hotspots of the NBRA are located at the extremities of the structure, while the hotspots of nanobridged-disks or rectangles at the CTP resonance […]