Abstract
The modes formed by two coupled chiral optical Tamm states localized at the interfaces between a photonic cholesteric liquid crystal conjugated with polarization-preserving anisotropic mirrors have been analytically and numerically investigated. These modes are only excited at the diffracting polarization of incident light. As the cholesteric layer thickness decreases, the spectral splitting of the localized state frequency is predicted. The splitting value depends on the crystal layer thickness. At the nondiffracting circular polarization, the localized modes are not excited, and the system becomes similar to the Fabry–Pérot cavity containing an anisotropic helical structure.
Highlights
The optical Tamm state (OTS) attracts the attention of researches among various surface localized optical states
Cholesteric liquid crystals (CLCs) thicknesses, the transmittance peak corresponding to the OTS was observed for this polarization
Since the light fell from the left and the CLC had a high reflectivity, the field was localized stronger on the left CLC boundary
Summary
The optical Tamm state (OTS) attracts the attention of researches among various surface localized optical states. The field decay inside the photonic crystal is caused by the Bragg reflection condition Such a localized mode at the interface between two materials can be excited by both TE and TM linear polarizations at any light incidence angle. In contrast to scalar photonic-crystal materials or distributed Bragg reflectors, CLCs have only band gap at the normal incidence of light. This band gap only exists for light with the diffracting circular polarization coinciding with the twisting of a cholesteric helix. Obtaining a Tamm plasmon localized between the CLC and metallic layer or the OTS localized between the CLC and distributed Bragg reflector is a challenging problem We examine the coupling between two chiral OTSs localized at both CLC boundaries
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
