Abstract

The spectral properties of the emission of a colloidal suspension of titanium dioxide particles in Rhodamine 640 perchlorate were studied systematically. The particle density ρ, the dye concentration c, and the energy of the pump pulse were varied over several orders of magnitude; the dependence of the spectra on these three parameters is discussed. We discovered a strong correlation between the particle density and the dye concentration. The amplification by stimulated emission was found to be strongest when the absorption length la and the mean-free-path length l* had approximately the same magnitude. The respective l* values were determined by a pulsed transmission experiment.

© 1997 Optical Society of America

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References

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    [Crossref] [PubMed]
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    [Crossref]
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    [Crossref] [PubMed]
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    [Crossref] [PubMed]

1996 (3)

1995 (5)

N. M. Lawandy and R. M. Balachandran, Nature (London) 373, 204 (1995).
[Crossref]

R. M. Balachandran and N. M. Lawandy, Opt. Lett. 20, 1271 (1995).
[Crossref] [PubMed]

W. Zhang, N. Cue, and K. M. Yoo, Opt. Lett. 20, 961 (1995).
[Crossref]

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 203 (1995).
[Crossref]

M. A. Noginov, H. J. Caulfield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[Crossref]

1994 (3)

1987 (1)

G. H. Watson, P. A. Fleury, and S. L. McCall, Phys. Rev. Lett. 58, 945 (1987).
[Crossref] [PubMed]

1968 (1)

V. S. Letokhov, Sov. Phys. JETP 26, 835 (1968).

Ahmed, S. A.

Alfano, R. R.

Ali, M. A.

Balachandran, R. M.

N. M. Lawandy and R. M. Balachandran, Nature (London) 373, 204 (1995).
[Crossref]

R. M. Balachandran and N. M. Lawandy, Opt. Lett. 20, 1271 (1995).
[Crossref] [PubMed]

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[Crossref]

Berger, G. A.

Caulfield, H. J.

M. A. Noginov, H. J. Caulfield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[Crossref]

Cue, N.

Fleury, P. A.

G. H. Watson, P. A. Fleury, and S. L. McCall, Phys. Rev. Lett. 58, 945 (1987).
[Crossref] [PubMed]

Genack, A. Z.

Gomes, A. S. L.

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[Crossref]

John, S.

S. John and G. Pang, Phys. Rev. A 54, 3642 (1996).
[Crossref] [PubMed]

Kempe, M.

Lagendijk, A.

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 203 (1995).
[Crossref]

Lawandy, N. M.

N. M. Lawandy and R. M. Balachandran, Nature (London) 373, 204 (1995).
[Crossref]

R. M. Balachandran and N. M. Lawandy, Opt. Lett. 20, 1271 (1995).
[Crossref] [PubMed]

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[Crossref]

Letokhov, V. S.

V. S. Letokhov, Sov. Phys. JETP 26, 835 (1968).

Liu, C.-H.

McCall, S. L.

G. H. Watson, P. A. Fleury, and S. L. McCall, Phys. Rev. Lett. 58, 945 (1987).
[Crossref] [PubMed]

Noginov, M. A.

M. A. Noginov, H. J. Caulfield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[Crossref]

Noginova, N. E.

M. A. Noginov, H. J. Caulfield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[Crossref]

Pang, G.

S. John and G. Pang, Phys. Rev. A 54, 3642 (1996).
[Crossref] [PubMed]

Sauvain, E.

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[Crossref]

Sha, W. L.

Siddique, M.

van Albada, M. P.

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 203 (1995).
[Crossref]

Venkateswarlu, P.

M. A. Noginov, H. J. Caulfield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[Crossref]

Watson, G. H.

G. H. Watson, P. A. Fleury, and S. L. McCall, Phys. Rev. Lett. 58, 945 (1987).
[Crossref] [PubMed]

Wiersma, D. S.

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 203 (1995).
[Crossref]

Yoo, K. M.

Zhang, W.

Zhang, Z.-W.

Appl. Opt. (1)

Nature (London) (3)

N. M. Lawandy, R. M. Balachandran, A. S. L. Gomes, and E. Sauvain, Nature (London) 368, 436 (1994).
[Crossref]

D. S. Wiersma, M. P. van Albada, and A. Lagendijk, Nature (London) 373, 203 (1995).
[Crossref]

N. M. Lawandy and R. M. Balachandran, Nature (London) 373, 204 (1995).
[Crossref]

Opt. Commun. (1)

M. A. Noginov, H. J. Caulfield, N. E. Noginova, and P. Venkateswarlu, Opt. Commun. 118, 430 (1995).
[Crossref]

Opt. Lett. (5)

Phys. Rev. A (1)

S. John and G. Pang, Phys. Rev. A 54, 3642 (1996).
[Crossref] [PubMed]

Phys. Rev. Lett. (1)

G. H. Watson, P. A. Fleury, and S. L. McCall, Phys. Rev. Lett. 58, 945 (1987).
[Crossref] [PubMed]

Sov. Phys. JETP (1)

V. S. Letokhov, Sov. Phys. JETP 26, 835 (1968).

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Figures (3)

Fig. 1
Fig. 1

Peak intensity from a Rhodamine 640 perchlorate solution with TiO2 scatterers as a function of (a) the particle density ρ(c=2.5×10-3 M) and (b) the dye concentration c(ρ=1011 cm-3). Pulse energy, 1.5  mJ.

Fig. 2
Fig. 2

Linewidth of the emission from a Rhodamine 640 perchlorate solution with TiO2 particles as a function of (a) the particle density ρ(c=2.5×10-3 M) and (b) the dye concentration c(ρ=1011 cm-3).

Fig. 3
Fig. 3

Wavelength of the peak emission from a Rhodamine 640 perchlorate solution with TiO2 particles as a function of (a) the particle density ρ(c=2.5×10-3 M) and (b) the dye concentration c(ρ=1011 cm-3). Pulse energy, 1.5  mJ.

Tables (1)

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Table 1 Mean-Free-Path Length l* of a Colloidal Suspension of Titanium Dioxide Particles

Equations (1)

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d=l*la/3,

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