Generation of Tamm Plasmon Resonances for Light Confinement Applications in Narrowband Gradient-Index Filters Based on Nanoporous Anodic Alumina

Abstract

Gold-coated gradient-index filters based on nanoporous anodic alumina (Au-coated NAA−GIFs) were used as model platforms to elucidate how Tamm plasmons can be tailored by engineering the geometric features of the plasmonic and photonic components of these hybrid structures. NAA−GIFs with well-resolved, intense photonic stopbands at two positions of the visible spectrum were fabricated through sinusoidal pulse anodization. These model photonic crystals were used to assess how the quality of Tamm plasmon resonances can be enhanced by tuning the features of the dielectric mirror and the thickness of the porous gold coating layer. It is found that the highest value of the quality factor of Tamm resonance (Q Tamm = 237) is obtained for 11 nm of gold on a dielectric mirror with low porosity corresponding to the resonant spectral position of λ Tamm of ∼698 nm. Our analysis indicates that Tamm resonances in asproduced Au-coated NAA−GIFs are weak due to the constrained range of wavelengths (narrow bands) at which these photonic crystal structures reflect light. However, after broadening of their photonic stopband upon pore widening, Tamm resonances become better resolved, with higher intensity. It is also observed that the quality of light confinement worsens progressively with the thickness of the porous gold coating layer after a critical value. In contrast to conventional surface plasmon resonance systems, this hybrid Tamm porous system does not require complex coupling systems and provides a nanoporous structure that can be readily tailored for a range of photonic technologies such as sensing and lasing.

Impact of Tamm Plasmon Structures on Fluorescence and Optical Nonlinearity of Graphene Quantum Dots

“…Furthermore, TPs have exhibited remarkable potential in the realm of optical nonlinearity 12 . Hence, they are being considered for innovative applications in perfect absorbers 13 , nanoscale lasers 14 , lters 15 , bistable switches 16 , thermal emitters 17 , solar photovoltaic cells 18 , photodetectors 19 , and many other applications 20 . TPCs offer a transformative platform for manipulating light-matter interactions and introduce nanoscale con nement that can signi cantly amplify electromagnetic elds.…”

Impact of Tamm plasmon structures on fluorescence and optical nonlinearity of graphene quantum dots

“…Furthermore, TPs have exhibited remarkable potential in the realm of optical nonlinearity 12 . Hence, they are being considered for innovative applications in perfect absorbers 13 , nanoscale lasers 14 , filters 15 , bistable switches 16 , thermal emitters 17 , solar photovoltaic cells 18 , photodetectors 19 , and many other applications 4 . TPCs offer a transformative platform for manipulating light-matter interactions and introducing nanoscale confinement that can significantly amplify electromagnetic fields.…”

Tamm Plasmon Resonance as Optical Fingerprint of Silver/Bacteria Interaction

“…In contrast to localized surface plasmons resonances, TPs are polarization independent and can be excited with high quality factor at normal incidence angle, without the need for phase-matching techniques like a grating or prism coupling. , Beside this advantageous operative feature, the relative simplicity of the planar structure necessary to achieve the TP resonance lends itself to both facile fabrication (i.e., spin casting or sol–gel deposition , ) and large-scale fabrication procedures. So far, TPs have been utilized for many purposes, including lasing, modification of light-matter interaction, − radiative coolers, thermal emitters, and optical sensors, ,− among others. However, this comes with a disadvantage, as the electric field distribution of the TP mode is located predominantly at the DBR/metal interface, thus being almost inaccessible to external stimuli.…”