Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Topological edge states (acoustic pressure) are robust also in the presence of radiative loss, enabling nonreciprocal leaky-wave radiation from a crystal edge into a surrounding water domain, both in the forward (a) and backward (b) directions, for two different frequencies. Interestingly, such an acoustic leaky-wave antenna may enable 100% efficiency, regardless of aperture truncation.
