US 11,813,642 B2
Phononic system and method of making the same
Fabio Semperlotti, West Lafayette, IN (US); and Ting-Wei Liu, West Lafayette, IN (US)
Assigned to Purdue Research Foundation, West Lafayette, IN (US)
Filed by Purdue Research Foundation, West Lafayette, IN (US)
Filed on Jul. 26, 2018, as Appl. No. 16/046,982.
Claims priority of provisional application 62/536,985, filed on Jul. 26, 2017.
Prior Publication US 2019/0039093 A1, Feb. 7, 2019
Int. Cl. B06B 3/00 (2006.01); H02N 2/18 (2006.01); B06B 1/18 (2006.01); G10K 11/24 (2006.01)
CPC B06B 3/00 (2013.01) [B06B 1/18 (2013.01); G10K 11/24 (2013.01); H02N 2/186 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A system comprising:
a vibration source;
a first structure, wherein the first structure lacks space inversion symmetry, wherein the first structure comprises a first elastic lattice;
a second structure, wherein the second structure lacks space inversion symmetry, wherein the second structure comprises a second elastic lattice;
wherein the first structure is coupled to the second structure;
wherein each of the first elastic lattice and the second elastic lattice have a mirror symmetry to each other; and
wherein an interface of the first structure and the second structure is configured to propagate a unidirectional wave from the vibration source.