Shear axial modes in a PCTSCM, Part VIII: Spectral holes with dissimilar materials but without phase defects

Ryan J. Carey, Akhlesh Lakhtakia

Research output: Contribution to journalArticlepeer-review

Abstract

Sufficiently thick layers of 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; and the introduction of a phase defect between two identical PCTSCMs gives rise to spectral reflection and transmission holes. We show, here, that an alternative structure made of two different PCTSCMs can be used to produce spectral holes, provided that the constitutive properties and the dimensions of the two PCTSCMs are in a certain relationship. No phase defect is present in the alternative structure, but its effect is effectively simulated by the contrast in the material properties of the two PCTSCMs.

Original languageEnglish (US)
Pages (from-to)382-385
Number of pages4
JournalSensors and Actuators, A: Physical
Volume126
Issue number2
DOIs
StatePublished - Feb 14 2006

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering

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