Journal: Scientific Reports
Article Title: Inverse designed aperiodic multilayer perfect absorbers for mid infrared enable tunability switchability and angular robustness
doi: 10.1038/s41598-025-99995-6
Figure Lengend Snippet: (a): Simulated using the finite-difference time-domain (FDTD) method, this plot shows the normalized electric field intensity along the z-direction for multiple values of graphene chemical potential (µc = 0 to 1 eV). The simulation domain includes the air region above the structure, which allows visualization of both external and internal field behavior. At µc = 0.0 eV, where the structure is optimized for maximum absorption, the electric field in the air remains nearly constant, exhibiting an almost flat profile. This behavior indicates excellent impedance matching at the air-absorber interface, with negligible reflection—a hallmark of perfect absorption. As µc increases, the field confinement inside the multilayer weakens, confirming the switchable nature of the absorber.(b): Simulated using COMSOL Multiphysics, this panel shows the spatial distribution of the electric field inside the structure for two states: µc = 0 eV, with strong field localization, and µc = 1 eV, where the internal field intensity is significantly reduced. This independently confirms the tunable suppression of absorption and the modulation of plasmonic resonances in the multilayer stack.
Article Snippet: Figure presents a combined visualization of simulation results from FDTD and COMSOL Multiphysics, highlighting the evolution of electric field intensity with μc.
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