Graphene assisted tunable narrowband metamaterial absorber for infrared wavelength

We proposed the narrow band graphene metamaterial-based infrared tunable 4-split ring-shaped absorber, it can be fabricated by the chemical vapor deposition method, using Finite Element Method simulations. The proposed design is numerically investigated for the wavelength range 1.2 µm to 1.6 µm and 99.5% of the absorption response was shown. A wide range tunability is achieved by changing the chemical potential of graphene with respect to external applied voltage. The absorption can be seen at three narrowband peaks at 1.205 µm, 1.318 µm and 1.456 µm wavelength in single-layered structure. The device works as metamaterial because it shows the negative refractive index response at resonating frequency. Because of its large tunable range, the device can be used in several applications like optical communication, biosensors, and solar absorbers and can be integrated in photonic integrated circuits.