Figure 5
From: Direct Measurement of Optical Force Induced by Near-Field Plasmonic Cavity Using Dynamic Mode AFM

Comparison between the measured transmission coefficient T(d) (red circles) as a function of d for the infrared light of wavelength λ = 1550 nm and the normalized displacement amplitude A′1550(d) (black solid squares).
The solid line is drawn to guide the eye. The error bars show the standard deviation of the measurements. Green diamonds are obtained from the numerical calculation of the transmission coefficient. Also shown is the normalized displacement amplitude A′635(d) (blue solid triangles) obtained in the same plasmonic resonant cavities but with the infrared laser light being replaced by an alignment red laser beam of wavelength λ = 635 nm.