Visualization of Surface-acoustic-wave Potential by Transmission-mode Microwave Impedance Microscopy

Abstract

Elastic waves propagating in piezoelectric materials are accompanied by a time-varying electric potential, which is of critical importance for acousto-electronic applications. The spatial mapping of such a potential at microwave frequencies is challenging since the characteristic length scale is determined by the acoustic wavelength of several micrometers. In this work, we report the visualization of surface acoustic waves (SAWs) on ferroelectric samples by transmission-mode microwave impedance microscopy (T-MIM). The SAW potential launched by the interdigital transducer is detected by the tip and demodulated by the microwave electronics as time-independent spatial patterns. Wave phenomena such as interference and diffraction are imaged and the results are in excellent agreement with the theoretical analysis. Our work opens up a new avenue to study various electromechanical systems in a spatially resolved manner.

References in corpus (11)

• Topologically-protected refraction of robust kink states in valley photonic crystals
• Electrons surfing on a sound wave as a platform for quantum optics with flying electrons
• On-demand single-electron transfer between distant quantum dots
• Microwave imaging of mesoscopic percolating network in a manganite thin film
• Thickness-dependent Dielectric Constant of Few-layer In2Se3 Nano-flakes
• Modeling of a Cantilever-Based Near-Field Scanning Microwave Microscope
• Experimental Realization of a Reflections-Free Compact Delay Line Based on a Photonic Topological Insulator
• Imaging Microwave Electric Fields Using a Near-Field Scanning Microwave Microscope
• Acoustic Traps and Lattices for Electrons in Semiconductors
• Microwave Near-Field Imaging of Electric Fields in a Superconducting Microstrip Resonator
• Batch-fabricated cantilever probes with electrical shielding for nanoscale dielectric and conductivity imaging

Cited by in corpus (10)

• Microwave-to-optical conversion using lithium niobate thin-film acoustic resonators
• Coherent Acoustic Control of a Single Silicon Vacancy Spin in Diamond
• Phononic band structure engineering for high-Q gigahertz surface acoustic wave resonators on lithium niobate
• Electrical Control of Surface Acoustic Waves
• Observation of Gigahertz Topological Valley Hall Effect in Nanoelectromechanical Phononic Crystals
• Inverted Scanning Microwave Microscope for In Vitro Imaging and Characterization of Biological Cells
• Nanoscale Imaging of Super-High-Frequency Microelectromechanical Resonators with Femtometer Sensitivity
• Visualization of Acoustic Power Flow in Suspended Thin-film Lithium Niobate Phononic Devices
• Klein Tunneling of Gigahertz Elastic Waves in Nanoelectromechanical Metamaterials
• Direct Visualization of Gigahertz Acoustic Wave Propagation in Suspended Phononic Circuits