Hyperuniform disordered phononic structures
Hyperuniform disordered phononic structures
We demonstrate the existence of large phononic band gaps in designed hyperuniform (isotropic) disordered two-dimensional (2D) phononic structures of Pb cylinders in an epoxy matrix. The phononic band gaps in hyperuniform disordered phononic structures are comparable to band gaps of similar periodic structures, for both out-of-plane and in-plane polarizations. A large number of localized modes is identified near the band edges, as well as diffusive transmission throughout the rest of the frequency spectrum. Very high Q cavity modes for both out-of-plane and in-plane polarizations are formed by selectively removing a single cylinder out of the structure. Efficient waveguiding with almost 100% transmission through waveguide structures with arbitrary bends is also presented. We expand our results to thin three-dimensional layers of such structures and demonstrate effective band gaps related to the respective 2D band gaps. Moreover, the drop in the Q factor for the three-dimensional structures is not more than three orders of magnitude compared to the 2D ones.
Gkantzounis, G.
98556879-5d0d-40af-98e7-7102307ab8b5
Amoah, T.
c6334087-1222-495f-97b3-f3a645515076
Florescu, M.
14b7415d-9dc6-4ebe-a125-289e47648c65
31 March 2017
Gkantzounis, G.
98556879-5d0d-40af-98e7-7102307ab8b5
Amoah, T.
c6334087-1222-495f-97b3-f3a645515076
Florescu, M.
14b7415d-9dc6-4ebe-a125-289e47648c65
Gkantzounis, G., Amoah, T. and Florescu, M.
(2017)
Hyperuniform disordered phononic structures.
Physical Review B, 95 (9), [094120].
(doi:10.1103/PhysRevB.95.094120).
Abstract
We demonstrate the existence of large phononic band gaps in designed hyperuniform (isotropic) disordered two-dimensional (2D) phononic structures of Pb cylinders in an epoxy matrix. The phononic band gaps in hyperuniform disordered phononic structures are comparable to band gaps of similar periodic structures, for both out-of-plane and in-plane polarizations. A large number of localized modes is identified near the band edges, as well as diffusive transmission throughout the rest of the frequency spectrum. Very high Q cavity modes for both out-of-plane and in-plane polarizations are formed by selectively removing a single cylinder out of the structure. Efficient waveguiding with almost 100% transmission through waveguide structures with arbitrary bends is also presented. We expand our results to thin three-dimensional layers of such structures and demonstrate effective band gaps related to the respective 2D band gaps. Moreover, the drop in the Q factor for the three-dimensional structures is not more than three orders of magnitude compared to the 2D ones.
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Published date: 31 March 2017
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© 2017 American Physical Society.
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Local EPrints ID: 508208
URI: http://eprints.soton.ac.uk/id/eprint/508208
ISSN: 2469-9950
PURE UUID: f72c32cd-3115-4441-b761-0e603a370cf5
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Date deposited: 14 Jan 2026 17:54
Last modified: 15 Jan 2026 03:15
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Author:
G. Gkantzounis
Author:
T. Amoah
Author:
M. Florescu
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