Spectral response of a gigahertz-range nanomechanical oscillator

Abstract

We report the measurement and simulation of the transverse displacement spectrum of a multi-element nanomechanical oscillator at previously inaccessible frequencies of up to 3GHz. The detected displacement signal is enhanced in the high-frequency range by the presence of high-order resonance modes generated by coherent motion of individual elements. The spectrum reveals a rich structure with groups of peaks forming quasibands. The spectral structure is qualitatively analogous to atomic emission spectra.