期刊
PHYSICAL REVIEW LETTERS
卷 111, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.111.036103
关键词
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资金
- Defense Threat Reduction Agency [HDTRA 1-12-1-0008]
- NSF Grant [CMMI-1120724]
- Directorate For Engineering
- Div Of Civil, Mechanical, & Manufact Inn [1120724] Funding Source: National Science Foundation
We study the interaction of surface acoustic waves (SAWs) with a contact-based vibrational resonance of 1 mu m silica microspheres forming a two-dimensional granular crystal adhered to a substrate. The laser-induced transient grating technique is used to excite SAWs and measure their dispersion. The measured dispersion curves exhibit avoided crossing behavior due to the hybridization of the SAWs with the microsphere resonance. We compare the measured dispersion curves with those predicted by our analytical model and find excellent agreement. The approach presented can be used to study the contact mechanics and adhesion of micro- and nanoparticles as well as the dynamics of microscale granular crystals.
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