Figure 2
From: Tailoring Optical Forces Behavior in Nano-optomechanical Devices Immersed in Fluid Media

Electric field distributions in the planar slot waveguide. Spatial distributions of the normalized E x (x) for TM polarization of a silicon planar slot waveguide with g = 100 nm, immersed in Air, H2O, CS2, and CH3I, at a wavelength of λ 0 = 1550 nm. (a) Symmetric TM mode – TM0. (b) Antisymmetric TM mode – TM1.