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Interference-free superposition of nonzero order light modes: Functionalized optical landscapes
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View: Figures


Image of FIG. 1.
FIG. 1.

The tandem system of SLM and AOD used for our experiments. The camera image insets show multiple optical traps using tightly focused Gaussian modes. Similar optical trapping system was introduced by Akselrod et al. 14

Image of FIG. 2.
FIG. 2.

(a) A single BB is created by spatial filtration at the SLM and [(b) and (c)] multiplexed by the AOD without producing interference. The combination of the SLM and AOD can create different beam modes which can be multiplexed and manipulated independently [shown schematically in (d) and experimentally in (e) and (f)].

Image of FIG. 3.
FIG. 3.

(a) The interference pattern of two vortex beams of opposite topological charge. (b) A pair of oppositely charged vortex beams created by the SLM. (c) The AOD multiplexes the original two beams to produce four; one of each type is overlapped by the AOD. (d) Particles trapped in the individual and combined vortices experience different torque forces and rotation speeds. (e) OAM transfer in the central trap as a function of the power ratio between the time-shared vortices.

Image of FIG. 4.
FIG. 4.

(a) HOBB modes are created by the SLM, (b) then multiplexed and combined in the center by the AOD to create the time-shared noninterfering superposition of these modes; the inverse BB.


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Scitation: Interference-free superposition of nonzero order light modes: Functionalized optical landscapes