Chiral Optical Tamm States at the Interface between a Dye-Doped Cholesteric Liquid Crystal and an Anisotropic Mirror

Abstract

The resonant splitting of optical Tamm state numerically is demonstrated. The Tamm state is localized at the interface between a resonant chiral medium and a polarization-preserving anisotropic mirror. The chiral medium is considered as a cholesteric liquid crystal doped with resonant dye molecules. The article shows that the splitting occurs when dye resonance frequency coincides with the frequency of the Tamm state. In this case the reflectance, transmittance, and absorptance spectra show two distinct Tamm modes. For both modes, the field localization is at the interface between the media. The external field control of configurable optical and structural parameters paves the way for use in tunable chiral microlaser.

Chiral-Selective Tamm Plasmon Polaritons

“…In contrast to a conventional Tamm mode, the interference makes no nodes or antinodes as both running waves are right-handed circularly polarized. In other words, every x-polarized node coincides with a y-polarized antinode and vice versa, which results in a smooth profile [ 30 ]. The nontrivial field profile in CLC was thoroughly investigated and illustrated in [ 43 ].…”

“…Alternatively, the all-dielectric structures allowed us to obtain higher Q values at the expense of compactness. Additionally, the experimental implementation of all-dielectric handedness-preserving structures is difficult [30]. The phase matching is another crucial condition for localized state excitation.…”

P‐12.9: Dye‐Doped Nematic Liquid Crystal for Smart Windows

“…Dye-doped nematic liquid crystal (DNLC) devices, were developed in late 1960s and have found renewed interest as dimmer for switchable smart windows recently. Its unique features include electrically tunable transmittance, no use of polarizer, wide viewing angle, low manufacturing cost, and possible usage of flexible plastic substrates [1][2][3][4][5]. DNLC usually contains low concentration of positive dichroic dyes in a nematic liquid crystal, thus these dichroic dye molecules follow the orientation of the LC directors.…”

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

“…The reflectance spectra of the device plotted in Fig.9(f), (g) and (h) reveal the tunability of Tamm mode by varying the angle of incidence to 0 o , 45 o , and 90 o , respectively due to the birefringence property of the LC layer. LC based tunable Tamm plasmon devices are widely demonstrated due to their large birefringence and easy controllability via external stimuli[116][117][118].…”