Jun 7, 2020

A system for the nonreciprocal transmission of microwave acoustic waves

Posted by in categories: computing, electronics

Acoustic waves have been found to be highly versatile and promising carriers of information between chip-based electronic devices. This characteristic is ideal for the development of a number of electronic components, including microwave filters and transducers.

In the past, some researchers have tried to build devices in which waves are transmitted between two ports in a non-symmetric way. These are known as nonreciprocal devices. These devices could be particularly promising for the manipulation and routing of phonons, quasiparticles associated with . Building nonreciprocal devices that transmit acoustic waves, however, can be highly challenging, as typically transmit waves in a linear way.

Researchers at Harvard University have recently achieved the non-reciprocal transmission of non-reciprocal acoustic waves using a nonlinear parity-time symmetric system. This system, presented in a paper published in Nature Electronics, is based on two coupled acoustic resonators placed on a lithium niobate surface.

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