Optical sorting in evanescent standing wave
We combined the principle of evanescent optical conveyor belt with the tilted potential and together with the size effect we obtained a system that can efficiently sort submicrometer size object according to their size. No image recognision or decision making unit is needed.
We tested also other sizes but always one must be insensitive to the standing wave and the other has to be transportable by the evanescent optical conveyor belt. Examples of insensitive sizes are white in the following figure (d-polystyrene bead diameter, ΔU – depht of the trap, θ1 – incident angle on the prism surface).
Further examples of optical sorting of submicrometer objects.
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Last modification: 16 Jan 2009