Interferometric imaging of nonlocal electromechanical power transduction in ferroelectric domains
Abstract
The conversion between electrical and acoustic signals in piezoelectric materials is of fundamental importance for their applications. Because of the much slower speed of sound than speed of light in solids, mesoscopic imaging is imperative for the study of electroacoustic behaviors at microwave frequencies. In this paper, the electromechanical power transduction in lithium niobate domains is spatially resolved by microwave impedance microscopy. Because of the sign reversal of piezoelectric tensor in opposite domains, the interaction between electric fields and elastic waves leads to fringe patterns that are fundamentally different from the acoustic displacement fields. This approach uncovers hidden information in the piezoelectric transduction process and opens a frontier to explore various elastic phenomena in materials and devices.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- May 07, 2018
- Source ID
- 10.1073/pnas.1722499115
Entities
People
- Hui Dong
- Keji Lai
- Lu Zheng
- Weida Wu
- Wenbo Wang
- Xiaoyu Wu
- Yen-lin Huang
- Zheng Wang
Organizations
- Army Research Office
- David and Lucile Packard Foundation
- Division of Materials Research
- National Science Foundation
- Office of Basic Energy Sciences
- Rutgers University
- University of Texas at Austin