Single‐Material, Near‐Infrared Selective Absorber Based on Refractive Index‐Tunable Tamm Plasmon Structure

Abstract

efficient photonic applications such as near infrared spectra analysis, [1] telecommunications, [2] biomedical and chemical sensing. [3] Rapidly advancing plasmonics are of particular interest, along with their selective light-trapping with strongly localized photon energy, surface plasmons (SPs) have attracted attention due to their potential applications in medicine and chemistry, [4,5] as well as optical switching and near-field photonics. [6][7][8] However, many studies still rely on the Kretschmann-Raether excitation method, [9] requiring additional equipment to couple external light to surface modes at high angles of incidence (such as prisms), [10] or demand a metal/dielectric hybrid systems with delicately designed nanostructures to localize the photon energy in a deep-subwavelength region. [11] Unlike SPs, Tamm plasmons (TPs) can be directly observed with direct incidence without prism couplers and/or nanostructure. Also, the TPs structure can support surface waves dispersed within the light cone. [12] Optical TPs can form at the interfaces between distributed Bragg reflectors (DBRs) and with layers having optical thicknesses (t opt ) close to half the wavelength of light, similar to the electronic states that can occur in the energy bandgap of a crystal surface. [13,14] Because of their scalability and spectral tunability with a high quality (Q)-factor, and as sophisticated patterning is not required, TPs can be exploited in high-efficiency photonic applications; e.g., for photodetection, photocatalysis, biomedical diagnostics, and industrial process monitoring. [9,[15][16][17][18] Based on these theoretical advantages, the design and fabrication of real TP structures for practical applications have been studied. Recent approaches utilizing cavity-layer coupling, additional layers such as metasurfaces, [19] topological insulators, [20] and two-dimensional (2D) materials, including graphene and transition metal dichalcogenides, [21][22][23][24] have enhanced the available TP modes through adjustment of additional coupling. However, although these attempts successfully enhanced the resonator performance, they diminished the manufacturing advantages of the TP and planar structure. From the design point of view for satisfying both performance and manufacturing issues, DBR layers were stacked onto the metal reflector as a reversed structure from conventional TP structure. With reduced pairs of periodic layers (N) and by matching the impedance (Z) between As a powerful planar plasmonics, Tamm plasmon (TP) structures open up new possibilities for high-efficiency photonic applications demanding high quality (Q)-factor with scalability and spectral tunability. Despite the theoretical advantages of TP structures, TP configurations alternately stacked within limited materials and integer ranges result in thicker device sizes and still struggle to achieve ideal designs. Here, by introducing a computational model with varying design parameters, the configurations of highperformance TPs are presented within thin scal...

Ultra-thin midwavelength infrared absorber using bismuth based planar thin film metamaterials

“…However, the fabrication processes of such nanostructured absorbers usually require high precision and costly lithography techniques such as electron-beam lithography, which makes them difficult for massive industrial manufacturing and hence limiting their practical applications. An alternative approach for achieving perfect absorbers involves the use of multilayer thin-film stacks; [21][22][23] however, in traditional multilayer thin-film structure designs, each thin film features one quarter wavelength thickness, it results in the structure sensitive to the incident angles or polarizations, limited the applications in some specific situations.…”

Tamm plasmon polariton in planar structures: A brief overview and applications

“…Bikbaev et al [137] have theoretically demonstrated a narrowband perfect absorber exploiting TPP localized at the interface between a 1DPC and a nanocomposite with near-zero effective permittivity. Recently, Kim et al [138] have proposed a TP structure made of single material whose refractive index is tailored through porosity and prepared using glancing angle deposition technique. The single material TP structure shows near-unity absorption of ~99% with Q-factor of ~45 at λ=700 nm.…”

Tailoring Tamm Plasmon Resonances in Dielectric Nanoporous Photonic Crystals

“…Another significant advantage of TMM structures is that they can be fabricated by cost-competitive, fully scalable nanofabrication methods. This in turn provides high versatility to create new hybrid structures that can harness TMM resonances at specific wavelengths by judiciously engineering the properties and characteristics of the metal film and the underlying dielectric structure. , Structures supporting TMM modes have demonstrated versatility in different photonic fields such as lasers, − photodetectors, − thermal emitters, − and sensors. − A variety of materials have been explored as the plasmonic and photonic components of TMM systems, including magneto–photonic crystals (PCs), semiconductors and all-dielectric PCs, and epsilon-near-zero platforms . One dimensional PCs are the most frequently used photonic component due to their ease of design and fabrication, with the most widespread structure being a distributed Bragg reflector (DBR).…”