Tuning Nonlinear Mechanical Mode Coupling in GaAs Nanowires Using Cross-Section Morphology Control
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- 作者：A. P. Foster ; J. K. Maguire ; J. P. Bradley ; T. P. Lyons ; A. B. Krysa ; A. M. Fox ; M. S. Skolnick ; L. R. Wilson
- 刊名：Nano Letters
- 出版年：2016
- 出版时间：December 14, 2016
- 年：2016
- 卷：16
- 期：12
- 页码：7414-7420
- 全文大小：498K
- ISSN：1530-6992
文摘
We investigate the nonlinear mechanical properties of GaAs nanowires with anisotropic cross-section. Fundamental and second order flexural modes are studied using laser interferometry with good agreement found between experiment and theory describing the nonlinear response under mechanical excitation. In particular, we demonstrate that the sign of the nonlinear coupling between orthogonal modes is dependent on the cross-section aspect ratio. The findings are of interest for applications such as amplitude to frequency conversion and vectorial force sensing.