Fig. 2
From: Optomechanical terahertz detection with single meta-atom resonator
Characterization of the nanomechanical modes. a Blue curve: radio frequency spectra of the room temperature cantilever Brownian motion, displaying two fundamental mechanical resonances, labelled α and β. The red curve is a fit resulting from the sum of the spectral noise for two harmonic oscillators (red dashed curve) added to the noise floor of the balanced photo-diode unit (black dashed curve). b Numerical modelling of the amplitude of deformation u max for each mechanical mode. The α resonance corresponds to the cantilever oscillations in the Oxy plane of the SRR and the β resonance corresponds to oscillations in the Oxz plane
