Phononic crystals’ band gap manipulation via displacement modes

Sabiju Valiya Valappil*, Alejandro M. Aragón, Hans Goosen

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

1 Citation (Scopus)
27 Downloads (Pure)

Abstract

Phononic crystal band gaps (BGs), which are realized by Bragg scattering, have a central frequency and width related to the unit cell's size and the impedance mismatch between material phases. BG tuning has generally been performed by either trial and error or by computational tools such as topology optimization. In either case, understanding how to systematically change the design for a particular band structure is missing. This paper addresses this by closely studying the displacement modes within the wavebands that are responsible for the BG. We look at the variation in different displacement modes due to the changes in the geometry and correlate these changes to their corresponding band structures. We then use this insight to design the unit cell for a particular application, for instance, for generating partial BGs.

Original languageEnglish
Article number115061
Number of pages5
JournalSolid State Communications
Volume361
DOIs
Publication statusPublished - 2023

Keywords

  • Brillouin zone
  • Displacement modes
  • Partial band gaps
  • Phononic crystals

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