Non-reciprocal transmission of microwave acoustic waves in nonlinear parity–time symmetric resonators
- Harvard Univ., Cambridge, MA (United States)
- Harvard Univ., Cambridge, MA (United States); Washington Univ., St. Louis, MO (United States)
- Harvard Univ., Cambridge, MA (United States); California Institute of Technology (CalTech), Pasadena, CA (United States). Alliance for Quantum Technologies (AQT)
- Washington Univ., St. Louis, MO (United States)
Acoustic waves are versatile on-chip information carriers that can be used in applications such as microwave filters and transducers. Nonreciprocal devices, in which the transmission of waves is non-symmetric between two ports, are desirable for the manipulation and routing of phonons, but building acoustic non-reciprocal devices is difficult because acoustic systems typically have a linear response. Here, we report non-reciprocal transmission of microwave surface acoustic waves using a nonlinear parity–time symmetric system based on two coupled acoustic resonators in a lithium niobate platform. Furthermore, owing to the strong piezoelectricity of lithium niobate, we can tune the gain, loss and nonlinearity of the system using electric circuitry. Our approach can achieve 10 dB of non-reciprocal transmission for surface acoustic waves at a frequency of 200 MHz, and we use it to demonstrate a one-way circulation of acoustic waves in cascading non-reciprocal devices.
- Research Organization:
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF); US Office of Naval Research (ONR); US Air Force Office of Scientific Research (AFOSR)
- Grant/Contract Number:
- SC0019219; DMR-1231319; ECCS-1810233; N00014-15-1-2761; FA9550-14-1-0389
- OSTI ID:
- 1803634
- Journal Information:
- Nature Electronics, Vol. 3, Issue 5; ISSN 2520-1131
- Publisher:
- Springer NatureCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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