Twist Defect in Chiral Photonic Structures

Abstract

We demonstrate that twisting one part of a chiral photonic structure about its helical axis produces a single circularly polarized localized mode that gives rise to an anomalous crossover in propagation. Up to a crossover thickness, this defect results in a peak in transmission and exponential scaling of the linewidth for a circularly polarized wave with the same handedness as structure. Above the crossover, however, the linewidth saturates and the defect mode can be excited only by the oppositely polarized wave, resulting in a peak in reflection instead of transmission.

12 pages

References in corpus (1)

• Statistical Signatures of Photon Localization

Cited by in corpus (10)

• Theory of the propagation of coupled waves in arbitrarily-inhomogeneous stratified media
• Signatures of photon localization
• Strongly Resonant Transmission of Electromagnetic Radiation in Periodic Anisotropic Layered Media
• Photonic defect modes in cholesteric liquid crystal with a resonant nanocomposite layer and a twist defect
• Chiral Optical Tamm States: Temporal Coupled-Mode Theory
• Chiral Optical Tamm States at the Interface between a Cholesteric and an All-Dielectric Polarization-Preserving Anisotropic Mirror
• Third method for generation of spectral holes in chiral sculptured thin films
• Conoscopic patterns in photonic band gap of cholesteric liquid crystal cells with twist defects
• Geometric-phase signature of a structurally chiral dielectric slab with a central phase defect
• Effect of Anisotropy on Defect Mode Peculiariries in Chiral Liquid Crystals