Classical systems containing cleverly devised combinations of loss and gain elements
constitute extremely rich building units that can mimic non-Hermitian properties, which …

Signal processing with the use of acoustic waves is an important technology for various
functions in radio frequency (RF) systems, including matched filtering in congested parts of …

This letter presents a novel type of epitaxial gallium nitride (GaN) on semi-insulating silicon
carbide (4H-SiC)-based high-overtone bulk acoustic resonators (HBARs) that eliminates the …

This work explores micromachined heterostructured waveguides that leverage strong
interactions between acoustic phonons and electrons to enable radio frequency (RF) signal …

Active surface acoustic wave components have the potential to transform RF front ends by
consolidating functionalities that currently occur across multiple chip technologies, leading …

The ability to create linear systems that manifest broadband nonreciprocal wave
propagation would provide for exquisite control over acoustic signals for electronic filtering …

This letter demonstrates amplification of surface acoustic waves through the application of
dc electric fields in low sheet density heterostructures of Al x Ga 1− x N barrier layers over …

Violating time-reversal symmetry enables one to engineer nonreciprocal structures for
isolating and rectifying sound and mechanical vibrations. Rectifying sound is commonly …

This letter reports on first-time demonstration of non-reciprocal acoustic transmission in a
gallium nitride (GaN) delay line structure. The split of forward (S21) and backward (S12) …

Tunable surface acoustic wave (SAW) devices have attracted considerable interests due to
its applications in emerging fields, such as secured wireless communication, adaptive signal …