Visualization of acoustic power flow in suspended thin-film lithium niobate phononic devices

Daehun Lee, Shawn Meyer, Songbin Gong, Ruochen Lu, Keji Lai

Research output: Contribution to journalArticlepeer-review

Abstract

We report direct visualization of gigahertz-frequency acoustic waves in lithium niobate phononic circuits. Primary propagation parameters, such as the power flow angle and propagation loss, are measured by transmission-mode microwave impedance microscopy. Using a fast Fourier transform, we can separately analyze forward and backward propagating waves and quantitatively evaluate the propagation loss. Our work provides insightful information on the propagation, diffraction, and attenuation in piezoelectric thin films, which is highly desirable for designing and optimizing phononic devices for microwave signal processing.

Original languageEnglish (US)
Article number214101
JournalApplied Physics Letters
Volume119
Issue number21
DOIs
StatePublished - Nov 22 2021

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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