Abstract

Morphological resonances are detected in elastic scattering and fluorescence excitation spectra from a cluster of two spheres, each ~5 μm in radius, isolated and oriented in an electrodynamic levitator trap. Light scattering at 90° and perpendicular to the line of centers of the particles, by broadside illumination with polarization in the scattering plane, shows that an independent particle model may be used in describing resonance positions and the shape of the spectrum, even though the joined particles differ in size by slightly less than 10 nm. In end-fire illumination the fluorescence excitation spectrum is missing a number of resonances that are seen with broadside illumination.

© 1994 Optical Society of America

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1993 (1)

S. Arnold, L. M. Folan, A. Korn, J. Appl. Phys. 74, 4291 (1993).
[CrossRef]

1992 (1)

1991 (2)

1988 (1)

1987 (1)

1986 (1)

S. Arnold, L. M. Folan, Rev. Sci. Instrum. 57, 2250 (1986).
[CrossRef]

1980 (1)

1971 (2)

A. Ashkin, J. M. Dziedzic, Phys. Rev. Lett. 19, 283 (1971).

J. H. Bruning, Y. T. Lo, IEEE Trans. Antennas Propag. AP-19, 378 (1971).
[CrossRef]

Arnold, S.

Ashkin, A.

A. Ashkin, J. M. Dziedzic, Appl. Opt. 19, 660 (1980).
[CrossRef] [PubMed]

A. Ashkin, J. M. Dziedzic, Phys. Rev. Lett. 19, 283 (1971).

Barber, P. W.

Bruning, J. H.

J. H. Bruning, Y. T. Lo, IEEE Trans. Antennas Propag. AP-19, 378 (1971).
[CrossRef]

Camunale, J.

Chang, R. K.

Dziedzic, J. M.

A. Ashkin, J. M. Dziedzic, Appl. Opt. 19, 660 (1980).
[CrossRef] [PubMed]

A. Ashkin, J. M. Dziedzic, Phys. Rev. Lett. 19, 283 (1971).

Folan, L. M.

S. Arnold, L. M. Folan, A. Korn, J. Appl. Phys. 74, 4291 (1993).
[CrossRef]

S. Arnold, L. M. Folan, Rev. Sci. Instrum. 57, 2250 (1986).
[CrossRef]

Fuller, K. A.

Garcia, N.

A. Z. Genack, J. H. Li, N. Garcia, A. A. Lisyansky, in Localization and Propagation of Classical Waves in Random and Periodic Structures, C. P. Soukoulis, ed. (Plenum, New York, 1993), pp. 23–55.

Genack, A. Z.

A. Z. Genack, J. H. Li, N. Garcia, A. A. Lisyansky, in Localization and Propagation of Classical Waves in Random and Periodic Structures, C. P. Soukoulis, ed. (Plenum, New York, 1993), pp. 23–55.

Kattawar, G. W.

Korn, A.

S. Arnold, L. M. Folan, A. Korn, J. Appl. Phys. 74, 4291 (1993).
[CrossRef]

Li, J. H.

A. Z. Genack, J. H. Li, N. Garcia, A. A. Lisyansky, in Localization and Propagation of Classical Waves in Random and Periodic Structures, C. P. Soukoulis, ed. (Plenum, New York, 1993), pp. 23–55.

Lisyansky, A. A.

A. Z. Genack, J. H. Li, N. Garcia, A. A. Lisyansky, in Localization and Propagation of Classical Waves in Random and Periodic Structures, C. P. Soukoulis, ed. (Plenum, New York, 1993), pp. 23–55.

Liu, C. T.

Lo, Y. T.

J. H. Bruning, Y. T. Lo, IEEE Trans. Antennas Propag. AP-19, 378 (1971).
[CrossRef]

Ramsey, J. M.

Schlicht, B.

Wall, K. F.

Whitten, W. B.

Appl. Opt. (2)

IEEE Trans. Antennas Propag. (1)

J. H. Bruning, Y. T. Lo, IEEE Trans. Antennas Propag. AP-19, 378 (1971).
[CrossRef]

J. Appl. Phys. (1)

S. Arnold, L. M. Folan, A. Korn, J. Appl. Phys. 74, 4291 (1993).
[CrossRef]

J. Opt. Soc. Am. A (1)

J. Opt. Soc. Am. B (1)

Opt. Lett. (2)

Phys. Rev. Lett. (1)

A. Ashkin, J. M. Dziedzic, Phys. Rev. Lett. 19, 283 (1971).

Rev. Sci. Instrum. (1)

S. Arnold, L. M. Folan, Rev. Sci. Instrum. 57, 2250 (1986).
[CrossRef]

Other (1)

A. Z. Genack, J. H. Li, N. Garcia, A. A. Lisyansky, in Localization and Propagation of Classical Waves in Random and Periodic Structures, C. P. Soukoulis, ed. (Plenum, New York, 1993), pp. 23–55.

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Figures (3)

Fig. 1
Fig. 1

Aligned dimer in an electrodynamic levitator trap. The dimer is irradiated in a broadside (kob) or end-fire (koe) configuration with polarization in the scattering plane. BS, beam splitter.

Fig. 2
Fig. 2

(a) Elastic scattering spectrum of a bisphere in broadside illumination with the polarization in the plane of scattering, (b) Two Mie scattering calculations: the solid curve is for a particle 5.309 μm in radius, whereas the dashed curve is for a particle 5.298 μm in radius. Both spheres are taken to have a refractive index of 1.49. (c), (d) Scattering calculations based on modal analysis with cross talk turned off and on, respectively.

Fig. 3
Fig. 3

(a) End-fire fluorescence excitation spectrum from a bisphere composed of a pair of spheres having radii of 5.212 and 5.401 μm (S and L, respectively), (b) Broadside fluorescence excitation spectrum from the same bisphere as in (a), (c) Mie absorption from particles S and L with a refractive index of 1.49 + 10−5i.

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