Chiral-Selective Tamm Plasmon Polaritons

Abstract

Chiral-selective Tamm plasmon polariton (TPP) has been investigated at the interface between a cholesteric liquid crystal and a metasurface. Different from conventional TPP that occurs with distributed Bragg reflectors and metals, the chiral–achiral TPP is successfully demonstrated. The design of the metasurface as a reflective half-wave plate provides phase and polarization matching. Accordingly, a strong localized electric field and sharp resonance are observed and proven to be widely tunable.

The Role of Periodic Structures in Light Harvesting

“…A distinctive feature of wheat chloroplasts is the presence of ordered cylindrical disc-shaped grana. In such structures, the manifestation of strong interactions between exciton, Bragg, and lattice resonances is possible [ 8 , 20 , 26 ]. Figure 3 and Figure 4 show how the density of photon states increases in the area of effective photosynthesis.…”

“…Each point shows the ratio from Formula (2) at different frequencies. In order to make the calculations while considering dispersion, we changed the real part of the refractive index in the area of the chlorophylls absorption lines a and b according to the method presented in Reference [ 26 ].…”

Metal–Dielectric Polarization-Preserving Anisotropic Mirror for Chiral Optical Tamm State

“…However, a PPAM with a large number of layers is difficult to be realized. Below, we show that the COTS can be excited with a thinner PPAM by incorporating the initial structure with a MS experimentally studied in Reference [28]. A schematic of the proposed structure is presented in Figure 2a.…”

“…The first way is to use a quarter-wave phase plate for the polarization correction [27]. The second way is to combine a chiral medium with an anisotropic mirror [23,[28][29][30][31]. Such a mirror retains the polarization sign at the reflection of light, i.e., the wave reflected from the mirror boundary has the same polarization as the incident wave.…”

“…However, such a structure is difficult to be implemented. In accordance with current technology requirements, one has to reduce the number of anisotropic layers until it reaches the experimentally available level described in Reference [28].…”