ElectroHolography Laboratory

Particles Trapped

What others have Trapped

gold (2 to 5 μm in diameter): almost spherical
silver (2 or 3 μm): irregularly shaped
bronze (2 to 15 μm): almost spherical
- Shunichi, S., Yasunori H., and Yoshio W., “Optical trapping of microscopic metal particles,” Opt. Lett. 19, 1807-1809 (1994).
silicon particles of 5-20 µm; nonspherical particles trapped better
- Zhang, Z., Cannan, D., Liu, J., Zhang, P., Christodoulides, D. N., Chen, Z., “Observation of trapping and transporting airborne absorbing particles with a single optical beam.” Optics Express. 20, 16212-16217 (2012).
graphite particles: 5 microns, 25-30mW
carbon nanoparticles: 1-5mW
- Shvedov, V., Hnatovsky, C., Rode, A. V. & Krolikowski, W., “Robust trapping and manipulation of airborne particles with a bottle beam”. Optics Express 19, 17350-17356 (2011).
graphite coated glass shells between 50 and 100 microns
- Eckerskorn, N. O., Zeng, N., Shvedov, V., Krolikowski, W. & Rode A. V., “Effect of polarization on transport of particles in air by optical vortex beam”. Journal of Optics 14, 1-5 (2012)
grass smut spores
tryptophan
- Pan, Y., Wang, C., Hill, A. C., Coleman, M., Beresnev, L. A. & Santarpia, J. L. “Trapping of individual airborne absorbing particles using a counterflow nozzle and photophoretic trap for continuous sampling and analysis”. Applied Physics Letters. 104, 1-4 (2014)
gold-coated hollow glass spheres (300 nm diameter)
- Shvedov, V., Davoyan, A. R., Hnatovsky, C., Engheta N. & Krolikowski W., “A long-range polarization-controlled optical tractor beam”. Nature Photon. 8, 846-850 (2014).

What we have Trapped

black liquor → also puffing
nano-diamonds (~100nm) → only nebulized
graphite (44 micron; 325 mesh)
tungsten (1-12 micron; mostly 4-6)
printer toner (powder)
dried sharpie ink
rhodamine-g (powder)
salt
glass beads (10-30 micron)
iron filings
silver powder (4-7 microns)

What didn't trap

aluminum powder (17-30 micron)
magnesium oxide (45 microns)
dry polystyrene
silver powder (1.3-3.2 microns)

What we want to trap

nano-tungsten
aqeous polystyrene

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