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

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 separ...

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Bibliographic Details
Published inApplied physics letters Vol. 119; no. 21
Main Authors Lee, Daehun, Meyer, Shawn, Gong, Songbin, Lu, Ruochen, Lai, Keji
Format Journal Article
LanguageEnglish
Published Melville American Institute of Physics 22.11.2021
Subjects
Acoustic propagation
Acoustic waves
Applied physics
Attenuation
Fast Fourier transformations
Fourier transforms
Lithium niobates
Piezoelectricity
Power flow
Propagation
Signal processing
Thin films
Visualization
Wave propagation
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Summary: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.
Bibliography:ObjectType-Article-1
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content type line 14
ISSN:0003-6951
1077-3118
DOI:10.1063/5.0073530