title: Tuning Nonlinear Mechanical Mode Coupling in GaAs Nanowires Using Cross-Section Morphology Control.
abstract: 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.
authors.affiliation: Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.
authors.forename: A P
authors.initials: AP
authors.lastname: Foster
authors.affiliation: Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.
authors.forename: J K
authors.initials: JK
authors.lastname: Maguire
authors.affiliation: Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.
authors.forename: J P
authors.initials: JP
authors.lastname: Bradley
authors.affiliation: Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.
authors.forename: T P
authors.initials: TP
authors.lastname: Lyons
authors.affiliation: Department of Electronics and Electrical Engineering, University of Sheffield , Sheffield S1 3JD, United Kingdom.
authors.forename: A B
authors.initials: AB
authors.lastname: Krysa
authors.affiliation: Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.
authors.forename: A M
authors.initials: AM
authors.lastname: Fox
authors.affiliation: Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.
authors.forename: M S
authors.initials: MS
authors.lastname: Skolnick
authors.affiliation: Department of Physics and Astronomy, University of Sheffield , Sheffield S3 7RH, United Kingdom.
authors.forename: L R
authors.initials: LR
authors.lastname: Wilson
keywords: Semiconductor nanowire; elongated cross-section; mechanical mode coupling; morphology control; nonlinearity