Defect modes in metamaterial photonic superlattices as tunneling resonances in trilayer structures

Role of Spectral Resonance Features and Surface Chemistry in the Optical Sensitivity of Light-Confining Nanoporous Photonic Crystals

“…Comparative analysis between measured and calculated values of λ RB using eq reveals a residual deviation that oscillates between 0.1 and 5%, which demonstrates the suitability of our model to tune the position of the resonance band of NAA−μQVs by the input anodization period in the STPA profile. To further validate our model, a custom-built MATLAB application using the TMM approach was used to generate simulated optical spectra of NAA−μQVs, using experimentally quantified values of n eff–max , n eff–min , and λ RB as inputs. − Details of the TMM implementation used to develop this application for NAA−μQVs considering resonance bands in photonic crystal structures in terms of bound states for a quarter quarter-wave-stack in air are provided in the Supporting Information. , Figure S4 (Supporting Information) shows the resulting simulated optical spectra of NAA−μQVs. At first glance, it is apparent that simulated optical spectra of NAA−μQVs feature resonance bands of higher quality than those of experimental NAA−μQVs, and more well-resolved photonic stopbands with reverberant, pronounced sidelobes.…”

“…36−38 Details of the TMM implementation used to develop this application for NAA−μQVs considering resonance bands in photonic crystal structures in terms of bound states for a quarter quarter-wave-stack in air are provided in the Supporting Information. 42,43 Figure S4 (Supporting Information) shows the resulting simulated optical spectra of NAA−μQVs. At first glance, it is apparent that simulated optical spectra of NAA−μQVs feature resonance bands of higher quality than those of experimental NAA−μQVs, and more well-resolved photonic stopbands with reverberant, pronounced sidelobes.…”

Multiple omnidirectional defect modes and nonlinear magnetic-field effects in metamaterial photonic superlattices with a polaritonic defect

“…In order to explain this behavior, we want to mention that it has been recently shown that defect modes behave in an analogous way to the bounded states in a quantum well. 43 Thus, in the region near ν T the dielectric permittivity of the polaritonic material reach very high values and the system behave as a very depth quantum well, which in the limit of n → ∞ will have infinite localized modes, of the form ϕ m = sin(ω m x), in the polaritonic layer, as it was previously shown from a tight-binding model. 23 With availability of metamaterials having unnaturally occurring high refractive indexes, 44 the present proposal is not limited to the inclusion of a polaritonic material as the defect layer.…”

Refractive index of ZnO ultrathin films alternated with Al2O3 in multilayer heterostructures

“…Note that this approach is only valid for heterostructures with building layer thicknesses below λ/10 [34], where λ is the incident wavelength. Since all the thicknesses for ZnO and Al 2 O 3 layers in this work fulfill the condition < λ/10, the approach could be used to retrieve the corresponding refractive indexes.…”