Application Gallery

Antoniades et al. proposed a new type of negative refractive index(NRI) coplanar waveguide(CPW) transmission line(TL), which can be used after conventional TL for phase compensation, allowing the design frequency to propagate through all TLs to achieve positive, negative, or zero phase shifts. The propagation characteristics of this NRI metamaterial are mainly determined by lumped elements. Therefore this new NRI-TL can change the phase characteristics by simply adjusting the value of the lumped element instead of adjusting the length. Thus, this new NRI-TL offers significant advantages over conventional delay lines ( its compact size, simplicity, ease of fabrication for planar microwave circuits, and linear phase response near the design frequency). This case study references Antoniades' work and models a zero-phase-shift NRI-TL operating at a frequency of f=1GHz.

Negative index metamaterial (NIM) refers to an artificial optical structure whose refractive index is negative for electromagnetic waves within a certain frequency range. The purpose of this article is to simulate and explain the metamaterial structure described in the paper written by J. Zhou.

Graphene is a single-layer carbon material that is only one atom thick. It can be used in nanoscale plasmon systems due to its unique physical properties. Light can be manipulated and controlled by adjusting the electrostatic doping or Fermi level to excite plasmon waves in single-layer graphene. According to the research by Chu et al., slight variations in the number of graphene layers and Fermi level can lead to significant changes in the resonant wavelength and modulation intensity. This case aims to simulate this tuning process in 3D FDTD.

Metamaterial is a man-made material with special properties that is not found in nature. This material can regulate basic physical characteristics such as frequency, amplitude, phase and polarization of electromagnetic waves. This case simulates the passive metamaterial described in the paper Chen et al.

Metamaterial is a special type of man-made material with extraordinary physical properties that natural materials do not have, such as regulating the frequency, amplitude, phase, etc. of electromagnetic waves. This case models and simulates a Metal-Insulator-Metal (MIM) plasmonic metamaterial infrared absorber to study its reflection/transmission/absorption characteristics in the visible to near-infrared band.