Piezoelectric, continuously twisted, structurally chiral materials (PCTSCMs) exhibit the circular Bragg phenomenon in a narrow frequency regime, when irradiated by a normally incident shear wave. The reflectance spectrum of a bilayer comprising two identical PCTSCM layers twisted with respect to each other by 90° is shown here to display a spectral hole, when the layers are relatively thin. As the layers become thicker, the reflection spectral hole vanishes, and a much thinner spectral transmission hole appears.
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics
- Surfaces, Coatings and Films
- Metals and Alloys
- Electrical and Electronic Engineering