Integrated acoustic circuits leverage guided acoustic waves for applications ranging from radio-frequency filters to quantum state transfer, biochemical sensing and nanomechanical computing. In many applications it is desirable to have a method for unidirectional acoustic wave emission. In this work we demonstrate directional emission in an integrated single-mode, on-chip membrane waveguide, demonstrating over 99.9% directional suppression and reconfigurable directionality. This avoids both loss and unwanted crosstalk, allowing the creation of more complex and compact phononic circuits.
@article{arxiv.2310.09308,
title = {Directional emission in an on-chip acoustic waveguide},
author = {Timothy M. F. Hirsch and Nicolas P. Mauranyapin and Erick Romero and Tina Jin and Glen Harris and Christopher G. Baker and Warwick . P. Bowen},
journal= {arXiv preprint arXiv:2310.09308},
year = {2025}
}