Optical Excitation and Detection of Picometer-Order Longitudinal Motion in Sub-µm Plasmomechanical Resonator

Abstract

We present a sub-µm-scale plasmomechanical resonator and demonstrate optical excitation and detection of picometer-order longitudinal motion. The resonator allows measurement of mechanical oscillation signal over a broad wavelength of the probe laser. We also investigated the tunability and thermoelastic properties of mechanical resonance depending on pump power.