Abstract

Optical trapping of dielectric particles by a single-beam gradient force trap was demonstrated for the first reported time. This confirms the concept of negative light pressure due to the gradient force. Trapping was observed over the entire range of particle size from 10 μm to ~25 nm in water. Use of the new trap extends the size range of macroscopic particles accessible to optical trapping and manipulation well into the Rayleigh size regime. Application of this trapping principle to atom trapping is considered.

© 1986 Optical Society of America

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References

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  1. A. Ashkin, Phys. Rev. Lett. 40, 729 (1978).
    [Crossref]
  2. A. Ashkin, Science 210, 1081 (1980); V. S. Letokhov and V. G. Minogin, Phys. Rep. 73, 1 (1981).
    [Crossref] [PubMed]
  3. A. Ashkin and J. P. Gordon, Opt. Lett. 8, 511 (1983).
    [Crossref] [PubMed]
  4. A. Ashkin and J. M. Dziedzic, Phys. Rev. Lett. 54, 1245 (1985).
    [Crossref] [PubMed]
  5. A. Ashkin and J. M. Dziedzic, Appl. Phys. Lett. 19, 283 (1971).
    [Crossref]
  6. P. W. Smith, A. Ashkin, and W. J. Tomlinson, Opt. Lett. 6, 284 (1981); and A. Ashkin, J. M. Dziedzic, and P. W. Smith, Opt. Lett. 7, 276 (1982).
    [Crossref] [PubMed]
  7. A. Ashkin, Phys. Rev. Lett. 24, 146 (1970).
    [Crossref]
  8. G. Roosen, Can. J. Phys. 57, 1260 (1979).
    [Crossref]
  9. See, for example, M. Kerker, The Scattering of Light (Academic, New York, 1969), p. 37.
  10. W. Heller, J. Chem. Phys. 42, 1609 (1965).
    [Crossref]
  11. Nalco Chemical Company, Chicago, Illinois; Ludox colloidal silica by DuPont Corporation, Wilmington, Delaware.

1985 (1)

A. Ashkin and J. M. Dziedzic, Phys. Rev. Lett. 54, 1245 (1985).
[Crossref] [PubMed]

1983 (1)

1981 (1)

1980 (1)

A. Ashkin, Science 210, 1081 (1980); V. S. Letokhov and V. G. Minogin, Phys. Rep. 73, 1 (1981).
[Crossref] [PubMed]

1979 (1)

G. Roosen, Can. J. Phys. 57, 1260 (1979).
[Crossref]

1978 (1)

A. Ashkin, Phys. Rev. Lett. 40, 729 (1978).
[Crossref]

1971 (1)

A. Ashkin and J. M. Dziedzic, Appl. Phys. Lett. 19, 283 (1971).
[Crossref]

1970 (1)

A. Ashkin, Phys. Rev. Lett. 24, 146 (1970).
[Crossref]

1965 (1)

W. Heller, J. Chem. Phys. 42, 1609 (1965).
[Crossref]

Ashkin, A.

A. Ashkin and J. M. Dziedzic, Phys. Rev. Lett. 54, 1245 (1985).
[Crossref] [PubMed]

A. Ashkin and J. P. Gordon, Opt. Lett. 8, 511 (1983).
[Crossref] [PubMed]

P. W. Smith, A. Ashkin, and W. J. Tomlinson, Opt. Lett. 6, 284 (1981); and A. Ashkin, J. M. Dziedzic, and P. W. Smith, Opt. Lett. 7, 276 (1982).
[Crossref] [PubMed]

A. Ashkin, Science 210, 1081 (1980); V. S. Letokhov and V. G. Minogin, Phys. Rep. 73, 1 (1981).
[Crossref] [PubMed]

A. Ashkin, Phys. Rev. Lett. 40, 729 (1978).
[Crossref]

A. Ashkin and J. M. Dziedzic, Appl. Phys. Lett. 19, 283 (1971).
[Crossref]

A. Ashkin, Phys. Rev. Lett. 24, 146 (1970).
[Crossref]

Dziedzic, J. M.

A. Ashkin and J. M. Dziedzic, Phys. Rev. Lett. 54, 1245 (1985).
[Crossref] [PubMed]

A. Ashkin and J. M. Dziedzic, Appl. Phys. Lett. 19, 283 (1971).
[Crossref]

Gordon, J. P.

Heller, W.

W. Heller, J. Chem. Phys. 42, 1609 (1965).
[Crossref]

Kerker, M.

See, for example, M. Kerker, The Scattering of Light (Academic, New York, 1969), p. 37.

Roosen, G.

G. Roosen, Can. J. Phys. 57, 1260 (1979).
[Crossref]

Smith, P. W.

Tomlinson, W. J.

Appl. Phys. Lett. (1)

A. Ashkin and J. M. Dziedzic, Appl. Phys. Lett. 19, 283 (1971).
[Crossref]

Can. J. Phys. (1)

G. Roosen, Can. J. Phys. 57, 1260 (1979).
[Crossref]

J. Chem. Phys. (1)

W. Heller, J. Chem. Phys. 42, 1609 (1965).
[Crossref]

Opt. Lett. (2)

Phys. Rev. Lett. (3)

A. Ashkin and J. M. Dziedzic, Phys. Rev. Lett. 54, 1245 (1985).
[Crossref] [PubMed]

A. Ashkin, Phys. Rev. Lett. 24, 146 (1970).
[Crossref]

A. Ashkin, Phys. Rev. Lett. 40, 729 (1978).
[Crossref]

Science (1)

A. Ashkin, Science 210, 1081 (1980); V. S. Letokhov and V. G. Minogin, Phys. Rep. 73, 1 (1981).
[Crossref] [PubMed]

Other (2)

Nalco Chemical Company, Chicago, Illinois; Ludox colloidal silica by DuPont Corporation, Wilmington, Delaware.

See, for example, M. Kerker, The Scattering of Light (Academic, New York, 1969), p. 37.

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Figures (2)

Fig. 1
Fig. 1

a) Diagram showing the ray optics of a spherical Mie particle trapped in water by the highly convergent light of a single-beam gradient force trap. b) Photograph, taken in fluorescence, of a 10-μm sphere trapped in water, showing the paths of the incident and scattered light rays.

Fig. 2
Fig. 2

Sketch of the basic apparatus used for the optical trapping of Mie and Rayleigh particles in water by means of a single-beam gradient force radiation-pressure trap.

Equations (3)

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F scat = I 0 c 128 π 5 r 6 3 λ 4 ( m 2 - 1 m 2 + 2 ) 2 n b .
F grad = - n b 2 α E 2 = - n b 3 r 3 2 ( m 2 - 1 m 2 - 2 ) E 2 .
R = F grad F scat = 3 3 64 π 5 n b 2 ( m 2 - 1 m 2 + 2 ) λ 5 r 3 w 0 2 1 ,

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