Abstract

The removal of dielectric particles and bacteria from water is an extremely important global issue, particularly, for drinking and sanitation. This work provides a demonstration of optical purification of water using an optical fiber-ring. The size of particles suspended in water for trapping is 2.08 μm in diameter and the wavelength of light used for inducing photothermal effect is 1.55 μm with a power of 97 mW. The fiber, 6 μm in diameter, was formed to a racket-shaped ring with a minimum diameter of 167 μm and a maximum one of 350 μm. Experiment indicates that the particles moved toward the ring with the highest velocity of 4.2 μm/s and are trapped/assembled in the center of the ring once the laser beam of 1.55-μm wavelength was launched into the fiber. With a moving of the fiber-ring, the trapped/assembled particles were moved and the water can be purified by removal of the particles.

© 2011 OSA

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    [CrossRef]
  2. A. Ashkin, J. M. Dziedzic, J. E. Bjorkholm, and S. Chu, “Observation of a single-beam gradient force optical trap for dielectric particles,” Opt. Lett. 11(5), 288–290 (1986).
    [CrossRef] [PubMed]
  3. D. G. Grier, “A revolution in optical manipulation,” Nature 424(6950), 810–816 (2003).
    [CrossRef] [PubMed]
  4. K. Dholakia and P. Reece, “Optical micromanipulation takes hold,” Nano Today 1(1), 18–27 (2006).
    [CrossRef]
  5. Z. H. Liu, C. K. Guo, J. Yang, and L. B. Yuan, “Tapered fiber optical tweezers for microscopic particle trapping: fabrication and application,” Opt. Express 14(25), 12510–12516 (2006).
    [CrossRef] [PubMed]
  6. M. P. MacDonald, G. C. Spalding, and K. Dholakia, “Microfluidic sorting in an optical lattice,” Nature 426(6965), 421–424 (2003).
    [CrossRef] [PubMed]
  7. A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
    [CrossRef]
  8. S. Kawata and T. Sugiura, “Movement of micrometer-sized particles in the evanescent field of a laser beam,” Opt. Lett. 17(11), 772–774 (1992).
    [CrossRef] [PubMed]
  9. A. H. J. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
    [CrossRef] [PubMed]
  10. B. S. Schmidt, A. H. J. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
    [CrossRef] [PubMed]
  11. K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Scannable plasmonic trapping using a gold stripe,” Nano Lett. 10(9), 3506–3511 (2010).
    [CrossRef] [PubMed]
  12. S. Y. Lin, E. Schonbrun, and K. Crozier, “Optical manipulation with planar silicon microring resonators,” Nano Lett. 10(7), 2408–2411 (2010).
    [CrossRef] [PubMed]
  13. G. Brambilla, G. S. Murugan, J. S. Wilkinson, and D. J. Richardson, “Optical manipulation of microspheres along a subwavelength optical wire,” Opt. Lett. 32(20), 3041–3043 (2007).
    [CrossRef] [PubMed]
  14. M. Tanaka, H. Monjushiro, and H. Watarai, “Laser photophoretic migration with periodic expansion-contraction motion of photo-absorbing microemulsion droplets in water,” Langmuir 20(25), 10791–10797 (2004).
    [CrossRef] [PubMed]
  15. C. Y. Soong, W. K. Li, C. H. Liu, and P. Y. Tzeng, “Theoretical analysis for photophoresis of a microscale hydrophobic particle in liquids,” Opt. Express 18(3), 2168–2182 (2010).
    [CrossRef] [PubMed]
  16. A. S. Desyatnikov, V. G. Shvedov, A. V. Rode, W. Krolikowski, and Y. S. Kivshar, “Photophoretic manipulation of absorbing aerosol particles with vortex beams: theory versus experiment,” Opt. Express 17(10), 8201–8211 (2009).
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  17. S. Duhr and D. Braun, “Optothermal molecule trapping by opposing fluid flow with thermophoretic drift,” Phys. Rev. Lett. 97(3), 038103 (2006).
    [CrossRef] [PubMed]
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  19. H. R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
    [CrossRef] [PubMed]
  20. C. B. Mast and D. Braun, “Thermal trap for DNA replication,” Phys. Rev. Lett. 104(18), 188102 (2010).
    [CrossRef] [PubMed]
  21. E. J. G. Peterman, F. Gittes, and C. F. Schmidt, “Laser-induced heating in optical traps,” Biophys. J. 84(2), 1308–1316 (2003).
    [CrossRef] [PubMed]
  22. K. F. Palmer and D. Williams, “Optical properties of water in the near infrared,” J. Opt. Soc. Am. 64(8), 1107–1110 (1974).
    [CrossRef]
  23. P. Reineck, C. J. Wienken, and D. Braun, “Thermophoresis of single stranded DNA,” Electrophoresis 31(2), 279–286 (2010).
    [CrossRef] [PubMed]
  24. D. W. James, “The thermal diffusivity of ice and water between −40 and +60°C,” J. Mater. Sci. 3(5), 540–543 (1968).
    [CrossRef]
  25. D. Braun and A. Libchaber, “Trapping of DNA by thermophoretic depletion and convection,” Phys. Rev. Lett. 89(18), 188103 (2002).
    [CrossRef] [PubMed]

2010 (5)

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Scannable plasmonic trapping using a gold stripe,” Nano Lett. 10(9), 3506–3511 (2010).
[CrossRef] [PubMed]

S. Y. Lin, E. Schonbrun, and K. Crozier, “Optical manipulation with planar silicon microring resonators,” Nano Lett. 10(7), 2408–2411 (2010).
[CrossRef] [PubMed]

C. Y. Soong, W. K. Li, C. H. Liu, and P. Y. Tzeng, “Theoretical analysis for photophoresis of a microscale hydrophobic particle in liquids,” Opt. Express 18(3), 2168–2182 (2010).
[CrossRef] [PubMed]

C. B. Mast and D. Braun, “Thermal trap for DNA replication,” Phys. Rev. Lett. 104(18), 188102 (2010).
[CrossRef] [PubMed]

P. Reineck, C. J. Wienken, and D. Braun, “Thermophoresis of single stranded DNA,” Electrophoresis 31(2), 279–286 (2010).
[CrossRef] [PubMed]

2009 (3)

H. R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

A. S. Desyatnikov, V. G. Shvedov, A. V. Rode, W. Krolikowski, and Y. S. Kivshar, “Photophoretic manipulation of absorbing aerosol particles with vortex beams: theory versus experiment,” Opt. Express 17(10), 8201–8211 (2009).
[CrossRef] [PubMed]

A. H. J. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[CrossRef] [PubMed]

2008 (2)

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

M. Braibanti, D. Vigolo, and R. Piazza, “Does thermophoretic mobility depend on particle size?” Phys. Rev. Lett. 100(10), 108303 (2008).
[CrossRef] [PubMed]

2007 (2)

G. Brambilla, G. S. Murugan, J. S. Wilkinson, and D. J. Richardson, “Optical manipulation of microspheres along a subwavelength optical wire,” Opt. Lett. 32(20), 3041–3043 (2007).
[CrossRef] [PubMed]

B. S. Schmidt, A. H. J. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
[CrossRef] [PubMed]

2006 (3)

K. Dholakia and P. Reece, “Optical micromanipulation takes hold,” Nano Today 1(1), 18–27 (2006).
[CrossRef]

Z. H. Liu, C. K. Guo, J. Yang, and L. B. Yuan, “Tapered fiber optical tweezers for microscopic particle trapping: fabrication and application,” Opt. Express 14(25), 12510–12516 (2006).
[CrossRef] [PubMed]

S. Duhr and D. Braun, “Optothermal molecule trapping by opposing fluid flow with thermophoretic drift,” Phys. Rev. Lett. 97(3), 038103 (2006).
[CrossRef] [PubMed]

2004 (1)

M. Tanaka, H. Monjushiro, and H. Watarai, “Laser photophoretic migration with periodic expansion-contraction motion of photo-absorbing microemulsion droplets in water,” Langmuir 20(25), 10791–10797 (2004).
[CrossRef] [PubMed]

2003 (3)

D. G. Grier, “A revolution in optical manipulation,” Nature 424(6950), 810–816 (2003).
[CrossRef] [PubMed]

M. P. MacDonald, G. C. Spalding, and K. Dholakia, “Microfluidic sorting in an optical lattice,” Nature 426(6965), 421–424 (2003).
[CrossRef] [PubMed]

E. J. G. Peterman, F. Gittes, and C. F. Schmidt, “Laser-induced heating in optical traps,” Biophys. J. 84(2), 1308–1316 (2003).
[CrossRef] [PubMed]

2002 (1)

D. Braun and A. Libchaber, “Trapping of DNA by thermophoretic depletion and convection,” Phys. Rev. Lett. 89(18), 188103 (2002).
[CrossRef] [PubMed]

1992 (1)

S. Kawata and T. Sugiura, “Movement of micrometer-sized particles in the evanescent field of a laser beam,” Opt. Lett. 17(11), 772–774 (1992).
[CrossRef] [PubMed]

1986 (1)

A. Ashkin, J. M. Dziedzic, J. E. Bjorkholm, and S. Chu, “Observation of a single-beam gradient force optical trap for dielectric particles,” Opt. Lett. 11(5), 288–290 (1986).
[CrossRef] [PubMed]

1974 (1)

K. F. Palmer and D. Williams, “Optical properties of water in the near infrared,” J. Opt. Soc. Am. 64(8), 1107–1110 (1974).
[CrossRef]

1970 (1)

A. Ashkin, “Acceleration and trapping of particles by radiation pressure,” Phys. Rev. Lett. 24(4), 156–159 (1970).
[CrossRef]

1968 (1)

D. W. James, “The thermal diffusivity of ice and water between −40 and +60°C,” J. Mater. Sci. 3(5), 540–543 (1968).
[CrossRef]

Ashkin, A.

A. Ashkin, J. M. Dziedzic, J. E. Bjorkholm, and S. Chu, “Observation of a single-beam gradient force optical trap for dielectric particles,” Opt. Lett. 11(5), 288–290 (1986).
[CrossRef] [PubMed]

A. Ashkin, “Acceleration and trapping of particles by radiation pressure,” Phys. Rev. Lett. 24(4), 156–159 (1970).
[CrossRef]

Bjorkholm, J. E.

A. Ashkin, J. M. Dziedzic, J. E. Bjorkholm, and S. Chu, “Observation of a single-beam gradient force optical trap for dielectric particles,” Opt. Lett. 11(5), 288–290 (1986).
[CrossRef] [PubMed]

Braibanti, M.

M. Braibanti, D. Vigolo, and R. Piazza, “Does thermophoretic mobility depend on particle size?” Phys. Rev. Lett. 100(10), 108303 (2008).
[CrossRef] [PubMed]

Brambilla, G.

G. Brambilla, G. S. Murugan, J. S. Wilkinson, and D. J. Richardson, “Optical manipulation of microspheres along a subwavelength optical wire,” Opt. Lett. 32(20), 3041–3043 (2007).
[CrossRef] [PubMed]

Braun, D.

C. B. Mast and D. Braun, “Thermal trap for DNA replication,” Phys. Rev. Lett. 104(18), 188102 (2010).
[CrossRef] [PubMed]

P. Reineck, C. J. Wienken, and D. Braun, “Thermophoresis of single stranded DNA,” Electrophoresis 31(2), 279–286 (2010).
[CrossRef] [PubMed]

S. Duhr and D. Braun, “Optothermal molecule trapping by opposing fluid flow with thermophoretic drift,” Phys. Rev. Lett. 97(3), 038103 (2006).
[CrossRef] [PubMed]

D. Braun and A. Libchaber, “Trapping of DNA by thermophoretic depletion and convection,” Phys. Rev. Lett. 89(18), 188103 (2002).
[CrossRef] [PubMed]

Chu, S.

A. Ashkin, J. M. Dziedzic, J. E. Bjorkholm, and S. Chu, “Observation of a single-beam gradient force optical trap for dielectric particles,” Opt. Lett. 11(5), 288–290 (1986).
[CrossRef] [PubMed]

Crozier, K.

S. Y. Lin, E. Schonbrun, and K. Crozier, “Optical manipulation with planar silicon microring resonators,” Nano Lett. 10(7), 2408–2411 (2010).
[CrossRef] [PubMed]

Crozier, K. B.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Scannable plasmonic trapping using a gold stripe,” Nano Lett. 10(9), 3506–3511 (2010).
[CrossRef] [PubMed]

Desyatnikov, A. S.

A. S. Desyatnikov, V. G. Shvedov, A. V. Rode, W. Krolikowski, and Y. S. Kivshar, “Photophoretic manipulation of absorbing aerosol particles with vortex beams: theory versus experiment,” Opt. Express 17(10), 8201–8211 (2009).
[CrossRef] [PubMed]

Dholakia, K.

K. Dholakia and P. Reece, “Optical micromanipulation takes hold,” Nano Today 1(1), 18–27 (2006).
[CrossRef]

M. P. MacDonald, G. C. Spalding, and K. Dholakia, “Microfluidic sorting in an optical lattice,” Nature 426(6965), 421–424 (2003).
[CrossRef] [PubMed]

Dickinson, M. R.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

Duhr, S.

S. Duhr and D. Braun, “Optothermal molecule trapping by opposing fluid flow with thermophoretic drift,” Phys. Rev. Lett. 97(3), 038103 (2006).
[CrossRef] [PubMed]

Dziedzic, J. M.

A. Ashkin, J. M. Dziedzic, J. E. Bjorkholm, and S. Chu, “Observation of a single-beam gradient force optical trap for dielectric particles,” Opt. Lett. 11(5), 288–290 (1986).
[CrossRef] [PubMed]

Erickson, D.

A. H. J. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[CrossRef] [PubMed]

B. S. Schmidt, A. H. J. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
[CrossRef] [PubMed]

Gittes, F.

E. J. G. Peterman, F. Gittes, and C. F. Schmidt, “Laser-induced heating in optical traps,” Biophys. J. 84(2), 1308–1316 (2003).
[CrossRef] [PubMed]

Grier, D. G.

D. G. Grier, “A revolution in optical manipulation,” Nature 424(6950), 810–816 (2003).
[CrossRef] [PubMed]

Grigorenko, A. N.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

Guo, C. K.

Z. H. Liu, C. K. Guo, J. Yang, and L. B. Yuan, “Tapered fiber optical tweezers for microscopic particle trapping: fabrication and application,” Opt. Express 14(25), 12510–12516 (2006).
[CrossRef] [PubMed]

James, D. W.

D. W. James, “The thermal diffusivity of ice and water between −40 and +60°C,” J. Mater. Sci. 3(5), 540–543 (1968).
[CrossRef]

Jiang, H. R.

H. R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

Kawata, S.

S. Kawata and T. Sugiura, “Movement of micrometer-sized particles in the evanescent field of a laser beam,” Opt. Lett. 17(11), 772–774 (1992).
[CrossRef] [PubMed]

Kivshar, Y. S.

A. S. Desyatnikov, V. G. Shvedov, A. V. Rode, W. Krolikowski, and Y. S. Kivshar, “Photophoretic manipulation of absorbing aerosol particles with vortex beams: theory versus experiment,” Opt. Express 17(10), 8201–8211 (2009).
[CrossRef] [PubMed]

Klug, M.

A. H. J. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[CrossRef] [PubMed]

Krolikowski, W.

A. S. Desyatnikov, V. G. Shvedov, A. V. Rode, W. Krolikowski, and Y. S. Kivshar, “Photophoretic manipulation of absorbing aerosol particles with vortex beams: theory versus experiment,” Opt. Express 17(10), 8201–8211 (2009).
[CrossRef] [PubMed]

Li, W. K.

C. Y. Soong, W. K. Li, C. H. Liu, and P. Y. Tzeng, “Theoretical analysis for photophoresis of a microscale hydrophobic particle in liquids,” Opt. Express 18(3), 2168–2182 (2010).
[CrossRef] [PubMed]

Libchaber, A.

D. Braun and A. Libchaber, “Trapping of DNA by thermophoretic depletion and convection,” Phys. Rev. Lett. 89(18), 188103 (2002).
[CrossRef] [PubMed]

Lin, S. Y.

S. Y. Lin, E. Schonbrun, and K. Crozier, “Optical manipulation with planar silicon microring resonators,” Nano Lett. 10(7), 2408–2411 (2010).
[CrossRef] [PubMed]

Lipson, M.

A. H. J. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[CrossRef] [PubMed]

B. S. Schmidt, A. H. J. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
[CrossRef] [PubMed]

Liu, C. H.

C. Y. Soong, W. K. Li, C. H. Liu, and P. Y. Tzeng, “Theoretical analysis for photophoresis of a microscale hydrophobic particle in liquids,” Opt. Express 18(3), 2168–2182 (2010).
[CrossRef] [PubMed]

Liu, Z. H.

Z. H. Liu, C. K. Guo, J. Yang, and L. B. Yuan, “Tapered fiber optical tweezers for microscopic particle trapping: fabrication and application,” Opt. Express 14(25), 12510–12516 (2006).
[CrossRef] [PubMed]

MacDonald, M. P.

M. P. MacDonald, G. C. Spalding, and K. Dholakia, “Microfluidic sorting in an optical lattice,” Nature 426(6965), 421–424 (2003).
[CrossRef] [PubMed]

Mast, C. B.

C. B. Mast and D. Braun, “Thermal trap for DNA replication,” Phys. Rev. Lett. 104(18), 188102 (2010).
[CrossRef] [PubMed]

Monjushiro, H.

M. Tanaka, H. Monjushiro, and H. Watarai, “Laser photophoretic migration with periodic expansion-contraction motion of photo-absorbing microemulsion droplets in water,” Langmuir 20(25), 10791–10797 (2004).
[CrossRef] [PubMed]

Moore, S. D.

A. H. J. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[CrossRef] [PubMed]

Murugan, G. S.

G. Brambilla, G. S. Murugan, J. S. Wilkinson, and D. J. Richardson, “Optical manipulation of microspheres along a subwavelength optical wire,” Opt. Lett. 32(20), 3041–3043 (2007).
[CrossRef] [PubMed]

Palmer, K. F.

K. F. Palmer and D. Williams, “Optical properties of water in the near infrared,” J. Opt. Soc. Am. 64(8), 1107–1110 (1974).
[CrossRef]

Peterman, E. J. G.

E. J. G. Peterman, F. Gittes, and C. F. Schmidt, “Laser-induced heating in optical traps,” Biophys. J. 84(2), 1308–1316 (2003).
[CrossRef] [PubMed]

Piazza, R.

M. Braibanti, D. Vigolo, and R. Piazza, “Does thermophoretic mobility depend on particle size?” Phys. Rev. Lett. 100(10), 108303 (2008).
[CrossRef] [PubMed]

Reece, P.

K. Dholakia and P. Reece, “Optical micromanipulation takes hold,” Nano Today 1(1), 18–27 (2006).
[CrossRef]

Reineck, P.

P. Reineck, C. J. Wienken, and D. Braun, “Thermophoresis of single stranded DNA,” Electrophoresis 31(2), 279–286 (2010).
[CrossRef] [PubMed]

Richardson, D. J.

G. Brambilla, G. S. Murugan, J. S. Wilkinson, and D. J. Richardson, “Optical manipulation of microspheres along a subwavelength optical wire,” Opt. Lett. 32(20), 3041–3043 (2007).
[CrossRef] [PubMed]

Roberts, N. W.

A. N. Grigorenko, N. W. Roberts, M. R. Dickinson, and Y. Zhang, “Nanometric optical tweezers based on nanostructured substrates,” Nat. Photonics 2(6), 365–370 (2008).
[CrossRef]

Rode, A. V.

A. S. Desyatnikov, V. G. Shvedov, A. V. Rode, W. Krolikowski, and Y. S. Kivshar, “Photophoretic manipulation of absorbing aerosol particles with vortex beams: theory versus experiment,” Opt. Express 17(10), 8201–8211 (2009).
[CrossRef] [PubMed]

Sano, M.

H. R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

Schmidt, B. S.

A. H. J. Yang, S. D. Moore, B. S. Schmidt, M. Klug, M. Lipson, and D. Erickson, “Optical manipulation of nanoparticles and biomolecules in sub-wavelength slot waveguides,” Nature 457(7225), 71–75 (2009).
[CrossRef] [PubMed]

B. S. Schmidt, A. H. J. Yang, D. Erickson, and M. Lipson, “Optofluidic trapping and transport on solid core waveguides within a microfluidic device,” Opt. Express 15(22), 14322–14334 (2007).
[CrossRef] [PubMed]

Schmidt, C. F.

E. J. G. Peterman, F. Gittes, and C. F. Schmidt, “Laser-induced heating in optical traps,” Biophys. J. 84(2), 1308–1316 (2003).
[CrossRef] [PubMed]

Schonbrun, E.

S. Y. Lin, E. Schonbrun, and K. Crozier, “Optical manipulation with planar silicon microring resonators,” Nano Lett. 10(7), 2408–2411 (2010).
[CrossRef] [PubMed]

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Scannable plasmonic trapping using a gold stripe,” Nano Lett. 10(9), 3506–3511 (2010).
[CrossRef] [PubMed]

Shvedov, V. G.

A. S. Desyatnikov, V. G. Shvedov, A. V. Rode, W. Krolikowski, and Y. S. Kivshar, “Photophoretic manipulation of absorbing aerosol particles with vortex beams: theory versus experiment,” Opt. Express 17(10), 8201–8211 (2009).
[CrossRef] [PubMed]

Soong, C. Y.

C. Y. Soong, W. K. Li, C. H. Liu, and P. Y. Tzeng, “Theoretical analysis for photophoresis of a microscale hydrophobic particle in liquids,” Opt. Express 18(3), 2168–2182 (2010).
[CrossRef] [PubMed]

Spalding, G. C.

M. P. MacDonald, G. C. Spalding, and K. Dholakia, “Microfluidic sorting in an optical lattice,” Nature 426(6965), 421–424 (2003).
[CrossRef] [PubMed]

Steinvurzel, P.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Scannable plasmonic trapping using a gold stripe,” Nano Lett. 10(9), 3506–3511 (2010).
[CrossRef] [PubMed]

Sugiura, T.

S. Kawata and T. Sugiura, “Movement of micrometer-sized particles in the evanescent field of a laser beam,” Opt. Lett. 17(11), 772–774 (1992).
[CrossRef] [PubMed]

Tanaka, M.

M. Tanaka, H. Monjushiro, and H. Watarai, “Laser photophoretic migration with periodic expansion-contraction motion of photo-absorbing microemulsion droplets in water,” Langmuir 20(25), 10791–10797 (2004).
[CrossRef] [PubMed]

Tzeng, P. Y.

C. Y. Soong, W. K. Li, C. H. Liu, and P. Y. Tzeng, “Theoretical analysis for photophoresis of a microscale hydrophobic particle in liquids,” Opt. Express 18(3), 2168–2182 (2010).
[CrossRef] [PubMed]

Vigolo, D.

M. Braibanti, D. Vigolo, and R. Piazza, “Does thermophoretic mobility depend on particle size?” Phys. Rev. Lett. 100(10), 108303 (2008).
[CrossRef] [PubMed]

Wada, H.

H. R. Jiang, H. Wada, N. Yoshinaga, and M. Sano, “Manipulation of colloids by a nonequilibrium depletion force in a temperature gradient,” Phys. Rev. Lett. 102(20), 208301 (2009).
[CrossRef] [PubMed]

Wang, K.

K. Wang, E. Schonbrun, P. Steinvurzel, and K. B. Crozier, “Scannable plasmonic trapping using a gold stripe,” Nano Lett. 10(9), 3506–3511 (2010).
[CrossRef] [PubMed]

Watarai, H.

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Supplementary Material (1)

» Media 1: MOV (7529 KB)     

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Figures (6)

Fig. 1
Fig. 1

Schematic of the experimental setup and the structure of fiber-ring. (a) Experimental setup. The fiber-ring is immersed in a water suspension of silica spheres, fixed by a microstage, and connected with a 1.55-μm-laser through an erbium doped fiber amplifier (EDFA). The trapping process was observed by a microscope. The images were captured by the CCD and displayed by the computer. (b) The structure of the fiber-ring. The average diameter of the fiber is r = 6 μm. The maximum diameter of the ring is a = 350 μm while the minimum diameter is b = 167 μm.

Fig. 2
Fig. 2

Optical microscope images for different trapping process (microscope is focused on the trapped particles) (a) Image without laser launched, i.e. t = 0′00″, a few particles distributed randomly inside the ring. (b) Image with laser (1.55 μm, 97 mW) launched into the fiber for t = 4′00″, about seven hundred particles trapped in the center of the ring. (c) Image with laser for t = 9′00″, more than two thousand particles trapped in the center of the ring. (d) Image with laser for t = 14′00″, particles trapped in the ring almost saturated. The blue dashed region represents the main region for trapping particles. Detailed trapping process is shown in Media 1 (from 2′20″ to 3′00″).

Fig. 3
Fig. 3

(a) The number of particles trapped in the main region of the ring (as shown by the blue dashed line in Fig. 2d) with the time of the optical power applied. The inset shows the final state of the trapping process. (b) The average velocity of particles at different time of optical power applied with the distance from the accumulation position.

Fig. 4
Fig. 4

Optical microscope images showing the dragging process of the trapped particles. (a) Image of the fiber-ring moved to a distance of ~50 μm along x direction and ~40 μm along y direction from its original location indicated by the white-dashed-line ring, corresponding dragging time td = 0′00″. (b) Image for td = 0′20″, the trapped particles moved a short distance. (c) Image for td = 0′40″. (d) Image for td = 1′00″. (e) Image for td = 1′20″. (f) Image for td = 1′40″, almost all of the trapped particles moved to their new locations.

Fig. 5
Fig. 5

Two-dimensional simulation of power flow around the fiber-ring and temperature increment in the fiber-ring. (a) Optical filed distribution around the fiber-ring. The black outline is the layout of the ring, red arrows indicate the minimum diameter of the ring, and the white line shows a cross-section line of the ring. Inset I shows the local power flow distribution at the sharp bend (left boundary) of the ring, while inset II comparatively shows the local power flow distribution at the right boundary of the ring. (b) The power flow along the cross-section line (X axis) shown in (a), the red dashed lines are the inner boundaries of the fiber-ring. Inset shows the temperature increment between the inner boundaries.

Fig. 6
Fig. 6

Two-dimensional simulations of power flow around fiber-rings with different sizes and shapes and their trapping capability. The trapping region indicated by the yellow area together with dark dots. (a) For a racket-shaped ring with a larger size (maximum diameter 390 μm, minimum diameter 210 μm). (b) For a racket-shaped ring with a smaller size (maximum diameter 190 μm, minimum diameter 90 μm). (c) For an elliptic ring (maximum diameter 320 μm, minimum diameter 100 μm). (d) For a circular ring (diameter 170 μm).

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