Fig 1.
Schematic of the proposed nano-photonics perfect absorber: (a) front view depicting silver resonators, (b) rear view illustrating the nickel ground layer.
Fig 2.
Schematic illustration of the proposed geometry and excitation conditions of the incident electromagnetic field used to achieve enhanced absorption performance.
Table 1.
Detailed set of tunable geometrical and material parameters used for optimizing the proposed nanophotonic absorber design.
Fig 3.
Comparison of the absorption responses obtained from two different structural configurations: (a) absorptive behavior of Configuration I and (b) absorptive behavior of Configuration II.
Fig 4.
Influence of material variation on the absorption characteristics of the designed structure, showing (a) substrate-dependent absorption spectra and (b) resonator-material-dependent absorption spectra.
Fig 5.
Parametric investigation of thickness effects on absorptive performance, illustrating (a) resonator layer thickness variation and (b) substrate layer thickness variation.
Fig 6.
Influence of geometrical scaling on absorptive behavior: (a) effect of sensor dimensional variations on the absorption response, and (b) corresponding reflection and absorption spectra of the proposed absorber.
Fig 7.
Extracted effective electromagnetic properties of the designed absorber, showing (a) real parts of the permeability (μ) and permittivity (ε), and (b) imaginary parts of the permeability (μ) and permittivity (ε).
Fig 8.
Numerically obtained electromagnetic parameter characteristics of the proposed structure: (a) real and imaginary components of the reflection coefficient (S₁₁), and (b) real and imaginary components of the effective refractive index.
Fig 9.
Simulated impedance and scattering behavior of the proposed design, illustrating (a) normalized impedance response (z) and (b) reflection coefficient magnitude (|S₁₁|) expressed in decibels.
Fig 10.
Front-plane visualization of the silver-based resonator array illustrating nanophotonic electric-field distributions: (a) real component of the out-of-plane electric field (Ez) and (b) imaginary component of the out-of-plane electric field (Ez).
Fig 11.
Color-mapped front-view representation of the magnitude of the electric field within the silver resonators, showing (a) real part of |E| and (b) imaginary part of |E|.
Fig 12.
Front-view nanophotonic field maps depicting magnetic-field behavior in the silver resonator structure: (a) real component of the out-of-plane magnetic field (Hz) and (b) imaginary component of the out-of-plane magnetic field (Hz).
Fig 13.
Spatial distributions of the magnetic-field magnitude across the silver-based resonator array obtained from front-view simulations, illustrating (a) real part of |H| and (b) imaginary part of |H|.
Fig 14.
Back-plane representation of the nickel ground layer showing nanophotonic electric-field distributions: (a) real part of the out-of-plane electric field component (Ez) and (b) imaginary part of the out-of-plane electric field component (Ez).
Fig 15.
Rear-side color-mapped profiles of the electric-field magnitude within the nickel ground plane, illustrating (a) real component of |E| and (b) imaginary component of |E|.
Fig 16.
Back-view visualization of magnetic-field behavior at the nickel ground layer: (a) real part of the out-of-plane magnetic field (Hz) and (b) imaginary part of the out-of-plane magnetic field (Hz).
Fig 17.
Spatial distributions of the magnetic-field magnitude across the nickel ground layer obtained from rear-side simulations, showing (a) real part of |H| and (b) imaginary part of |H|.
Fig 18.
Front-plane depiction of surface current density distributions on the silver resonator array of the proposed nanophotonic absorber, illustrating (a) real and (b) imaginary components.
Fig 19.
Rear-side representation of surface current density profiles induced on the nickel ground layer of the proposed nanophotonic structure, showing (a) real and (b) imaginary components.
Fig 20.
Parametric assessment of angular dependence on absorption characteristics: (a) effect of varying the electromagnetic wave incidence angle and (b) effect of polarization angle rotation on absorption performance.
Table 2.
Comparative Analysis with Relevant Work.
Table 3.
Comparative Performance Metrics with Existing Absorbers.
Table 4.
Key Innovation Aspects of the Proposed Nano-Photonic Absorber.
Table 5.
Technically Grounded Roadmap for Absorber Validation.