Tailoring Active Far-Infrared Resonator with Graphene Metasurface and Its Complementary

Abstract

Far-infrared part of electromagnetic spectrum and its technological details have been highly sought after due to its myriad applications including imaging, spectroscopy, industry control, and communication. However, lack of efficient components of electronic and photonic sources/detectors working in this particular spectrum has impeded its widespread application. One of the bottlenecks lies in the compact far-infrared polarization-sensitive resonator/modulator in compatible with pixel-detector for far-infrared spectroscopy. In this work, we demonstrate strong electric resonance response in perforated graphene sheet at this particular electromagnetic region. The results demonstrate inherently different natures for the strong electromagnetic response between graphene-based and metallic metamaterials. Unlike the metallic metamaterials relying on the geometrical inductance for magnetic response, the electric resonance caused by localized dipole/multipolar modes is found to be dominated in graphene and thus enabling sub-wavelength confinement of electromagnetic field. The Babinet's principle is proposed to be applied for broadband far-infrared modulation and resonant filters design of graphene-based metamaterial. The active tunable electric resonance through electrostatic doping on the graphene-based patterns provides efficient route for compact biosensing, far-infrared imaging, and detection.

Shaping High‐Q Planar Fano Resonant Metamaterials toward Futuristic Technologies

“…The concentration of the electric field in positive asymmetric split ring (ASR) relates to the accumulation of surface current in complementary asymmetric split ring (CASR), and the surface current accumulates at a region in positive ASR, which relates to the concentration of the electric field in CASR as shown in Figure c . Subsequently, complementary structures of various designs have been used to develop polarization‐sensitive modulator, high‐ Q chiral metasurface for circular polarizers, and directional filters . In a recent work, by strategically positioning the dust particle along a nanoslit, the phononic mode of the particle was measured with maximum signal along the Fano lineshape, as the dust particle moves toward the middle of the nanoslit.…”

Duality of Spoof Surface Plasmon Polaritons on the Complementary Structures of Ultrathin Metal Films

“…On the other hand, complementary metal structures such as split ring resonators (SRRs), rods, etc. and their complements are usually adopted as building blocks in the design of planar metamaterial . In the optical band, the simulations show that the SPP modes on the complementary structures exhibit some dual relation between the E and H field.…”

Fano resonant metasurfaces at terahertz and infrared regime

“…Equations of motion determining the coupling between the bright and the dark modes are described by the following set of coupled equations, . 53 Subsequently, complementary structures of various designs could be promising as polarization-sensitive modulator, 54 high-Q chiral metasurface for circular polarizers, 55 and directional filters. 56 In a recent work, by strategically positioning the dust particle along the nanoslit, the phononic mode of the particle is detected along the Fano lineshape, with maximum signal as the dust particle move towards the middle of the nanoslit.…”