Fig. 6: Optically induced Duffing nonlinearity.
From: Near-field cavity optomechanical coupling in a compound semiconductor nanowire
a Conceptual illustration of optically induced Duffing nonlinearity via the static fourth-order optomechanical coupling. The purple spectral shape shows the typical Duffing response in contrast to the green Lorentz response. Two-mode mechanical amplitude achieved in the driven lock-in measurement at x ≈ 100 nm (blue) (b) and x ≈ 500 nm (red) (c).
