Abstract

Optical transport networks for active absorbing microparticles are made with holographic optical tweezers. The particles are powered by the optical potentials that make the network and transport themselves via random vapor-propelled hops to different traps. The geometries explored for the optical traps are square lattices, circular arrays, and random arrays. The degree distribution for the connections or possible paths between the traps are localized like in the case of random networks. The average travel times across n different traps scale as nb with exponents in the range of 2.06 and 2.31, in agreement with random walks on connected networks (upper bound n3). Finally, a particle traveling the network attracts others as a result of the vapor explosions enhancing transport.

© 2019 Optical Society of America

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Supplementary Material (10)

NameDescription
Visualization 1       Visualization 1: Array of 20 optical traps in a square lattice with separation of $6.3~\mu$m. Scale bar length: $10~\mu$m.
Visualization 2       Visualization 2: Array of 20 traps in a circle of radius $13.2~\mu$m. Scale bar length: $10~\mu$m.
Visualization 3       Visualization 3: Array of 20 optical traps in a square lattice with separation of $5.3~\mu$m. Scale bar length: $10~\mu$m.
Visualization 4       Visualization 4: Array of 10 traps in a circle of radius $5.1~\mu$m. Scale bar length: $10~\mu$m.
Visualization 5       Visualization 5: Random array with 20 traps (rand1). Scale bar length: $10~\mu$m.
Visualization 6       Visualization 6: Random array with 20 traps (rand2). Scale bar length: $10~\mu$m.
Visualization 7       Visualization 7: Two particles in a random lattice with 20 traps. Scale bar length: $10~\mu$m.
Visualization 8       Visualization 8: Two particles in a square lattice $L_2=3.6~\mu$m. Scale bar length: $10~\mu$m.
Visualization 9       Visualization 9: Two particles in circle array of 20 traps $R_2=13.2~\mu$m.
Visualization 10       Visualization 10: Several particles in square lattice $L_2=6.3~\mu$m slow motion. Scale bar is $10~\mu$m.

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Figures (4)

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Equations (1)

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