TY - JOUR
T1 - Phononic crystals’ band gap manipulation via displacement modes
AU - Valiya Valappil, Sabiju
AU - Aragón, Alejandro M.
AU - Goosen, Hans
PY - 2023
Y1 - 2023
N2 - 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.
AB - 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.
KW - Brillouin zone
KW - Displacement modes
KW - Partial band gaps
KW - Phononic crystals
UR - http://www.scopus.com/inward/record.url?scp=85145770746&partnerID=8YFLogxK
U2 - 10.1016/j.ssc.2022.115061
DO - 10.1016/j.ssc.2022.115061
M3 - Article
AN - SCOPUS:85145770746
SN - 0038-1098
VL - 361
JO - Solid State Communications
JF - Solid State Communications
M1 - 115061
ER -