(Springer Science and Business Media LLC, 2020-05-18) Shao, Linbo; Mao, Wenbo; Maity, Smarak; Sinclair, Neil; Hu, Yaowen; Yang, Lan; Lončar, Marko
Taking advantage of the piezoelectricity of lithium niobate, we achieve nonreciprocal transmission of 10 decibels for a 200-MHz surface acoustic wave using parity-time- symmetric resonators and demonstrate one-way circulation of acoustic waves.