Abstract

We report observations of lasing emission from liquid microdroplets of Fluorescein 548 dye in ethanol, seeded with submicrometer-sized fluorescent sol. An incident pump laser excites fluorescein dye molecules, which in turn couple energy to sol–dye molecules, generating lasing in the sol. The pump laser can also generate fluorescein lasing in the droplets, which may excite lasing in the sol. Other noteworthy findings include the absence of sol emission for larger sol and the presence of sol emission, even without any observable fluorescein emission, for smaller sol. All emissions are at wavelengths corresponding to morphology-dependent resonances of the droplet. Studies of the dependence of these emissions on pump laser intensity and sol concentration suggest that they are driven either by Förster energy transfer between fluorescein dye molecules and dye within the sol or by enhanced radiative transfer that occurs when fluorescein emission couples to morphology-dependent resonances of the droplet microcavity.

© 1992 Optical Society of America

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References

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1991 (1)

1990 (3)

1989 (3)

1988 (3)

1986 (3)

1985 (1)

L. M. Folan, S. Arnold, S. D. Druger, Chem. Phys. Lett. 118, 322 (1985).
[CrossRef]

1984 (1)

1959 (1)

T. Förster, Discuss. Faraday Soc. 27, 7 (1959).
[CrossRef]

Armstrong, R. L.

Arnold, S.

S. Arnold, L. M. Folan, Opt. Lett. 14, 387 (1989).
[CrossRef] [PubMed]

L. M. Folan, S. Arnold, S. D. Druger, Chem. Phys. Lett. 118, 322 (1985).
[CrossRef]

Benner, R. E.

Biswas, A.

Biwas, A.

Campillo, A. J.

Chang, R. K.

W.-F. Hsieh, J.-B. Zheng, R. K. Chang, Opt. Lett. 13, 496 (1988).
[CrossRef]

S.-X. Qian, R. K. Chang, Phys. Rev. Lett. 56, 926(1986).
[CrossRef] [PubMed]

H.-M. Tzeng, K. F. Wall, M. B. Long, R. K. Chang, Opt. Lett. 9, 499 (1984).
[CrossRef] [PubMed]

Chýlek, P.

Creegan, E.

Druger, S. D.

L. M. Folan, S. Arnold, S. D. Druger, Chem. Phys. Lett. 118, 322 (1985).
[CrossRef]

Eversole, J. D.

Fernandez, G.

Folan, L. M.

S. Arnold, L. M. Folan, Opt. Lett. 14, 387 (1989).
[CrossRef] [PubMed]

L. M. Folan, S. Arnold, S. D. Druger, Chem. Phys. Lett. 118, 322 (1985).
[CrossRef]

Förster, T.

T. Förster, Discuss. Faraday Soc. 27, 7 (1959).
[CrossRef]

Gu, J.

Hill, S. C.

Hsieh, W.-F.

W.-F. Hsieh, J.-B. Zheng, R. K. Chang, Opt. Lett. 13, 496 (1988).
[CrossRef]

Huston, A. L.

Jarzembski, M.

Justus, B. L.

Latifi, H.

Leung, P. T.

P. T. Leung, K. Young, J. Chem. Phys. 89, 2894(1988).
[CrossRef]

Lin, H.-B.

Long, M. B.

Pinnick, R. G.

Qian, S.-X.

S.-X. Qian, R. K. Chang, Phys. Rev. Lett. 56, 926(1986).
[CrossRef] [PubMed]

Ruekgauer, T. E.

Srivastava, V.

Tzeng, H.-M.

Wall, K. F.

Xie, J.-G.

Young, K.

P. T. Leung, K. Young, J. Chem. Phys. 89, 2894(1988).
[CrossRef]

Zheng, J.-B.

W.-F. Hsieh, J.-B. Zheng, R. K. Chang, Opt. Lett. 13, 496 (1988).
[CrossRef]

Appl. Opt. (1)

Chem. Phys. Lett. (1)

L. M. Folan, S. Arnold, S. D. Druger, Chem. Phys. Lett. 118, 322 (1985).
[CrossRef]

Discuss. Faraday Soc. (1)

T. Förster, Discuss. Faraday Soc. 27, 7 (1959).
[CrossRef]

J. Chem. Phys. (1)

P. T. Leung, K. Young, J. Chem. Phys. 89, 2894(1988).
[CrossRef]

J. Opt. Soc. Am. B (2)

Opt. Lett. (8)

Phys. Rev. A (1)

A. Biswas, H. Latifi, R. L. Armstrong, R. G. Pinnick, Phys. Rev. A 40, 7413 (1989).
[CrossRef] [PubMed]

Phys. Rev. Lett. (1)

S.-X. Qian, R. K. Chang, Phys. Rev. Lett. 56, 926(1986).
[CrossRef] [PubMed]

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Figures (2)

Fig. 1
Fig. 1

Single-laser-shot spectra of emission from 3 × 10−4 M fluorescein–ethanol droplets seeded with dye-impregnated sol. Sol-lasing peaks (a) are pumped by fluorescein lasing (b), which are in turn pumped by the 532-nm Nd:YAG laser.

Fig. 2
Fig. 2

Same as Fig. 1(a) except for (a) 53-nm and (b) 26-nm sol.

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