The experimental evidence of a strong coupling regime in the hybrid Tamm plasmon-surface plasmon polariton mode

Abstract

Total internal reflection ellipsometry was employed for the excitation and study of hybrid Tamm plasmon-surface plasmon polaritons mode. Simple optical methodology using optical filters to cut the part of incident light spectra was proposed. Using optical filters measured energy spectra was divided into two parts where in each range only one branch of the hybrid TPP-SPP plasmonic mode was excited directly by the incident light. Present experimental studies have shown, that if the investigated system is in strong coupling, this is always enough to excite only one component of the hybrid excitation. Thus, its dispersion relation will be the same as when the excitation is done with a whole spectrum. In the case of the TPP-SPP hybrid mode where strong coupling is realized only in p-polarized light, the fitting results have shown that the strongest coupling was at the point where the noninteracting TPP and SPP curves should be crossing. The obtained Rabi splitting for the hybrid TPP and SPP modes in BK7 prism/1D PC TiO2/SiO2 (60 nm/110 nm)/TiO2 (30 nm)/Au (40 nm) multilayered structure was about 105 meV.

Influence of a gold nano-bumps surface lattice array on the propagation length of strongly coupled Tamm and surface plasmon polaritons

“…In the model, the dispersions were described by two Lorentz oscillators which influence each other with equal strengths. 40 The splitting frequencies of two coupled harmonic oscillators can be written as:…”

“…In the model, the dispersions were described by two Lorentz oscillators which influence each other with equal strengths. 40 The splitting frequencies of two coupled harmonic oscillators can be written as:where ω ± -corresponds to the resonance frequencies of TPP and SPP components of the hybrid mode, ω is the free Bragg mode frequency which is not involved in the strong coupling and g is the coupling strength. ω was treated as a function of the angle of incidence ω j = ω j ( θ ).…”

High Spectral Sensitivity of Strongly Coupled Hybrid Tamm-Plasmonic Resonances for Biosensing Application

“…It was shown that the surface lattice arrays influence the propagation length of the hybrid Tamm surface plasmon polaritons modes under strong coupling [ 21 ]. The decreasing losses were also achieved in hybrid Tamm plasmon polariton modes due to strong coupling between them [ 22 ]. By achieving the conditions needed for both plasmonic excitations, a new state of hybrid TPP-SPP mode appears [ 23 ].…”

Application of Tamm Plasmon Polaritons and Cavity Modes for Biosensing in the Combined Spectroscopic Ellipsometry and Quartz Crystal Microbalance Method

“…TPPs have an in-plane wave vector, which is less than the wave vector of light in a vacuum, which allows for their direct optical excitation, while for the SPPs to achieve a total internal reflection condition, the incident light has to reach an in-plane wave vector equal to the surface plasmon resonance [ 20 ]. Hybrid Tamm plasmon–surface plasmon polariton modes in a strong coupling regime [ 21 ] have been also applied for gas [ 22 ] and biosensing applications [ 15 ]. In this case, the Tamm plasmon component was used for enhanced performance of the SPP component in the TIR configuration.…”