Abstract

The effect of absorption on microdroplet resonance emission line intensities was studied in 15-μm-diameter Rhodamine 6G/ethanol solution droplets. Absorption was controlled by varying the concentration of the additive nigrosin. Spectrally integrated intensities of resonant features are found to be proportional to a droplet cavity mode efficiency Qa/(Qa + Qo) expressed in terms of cavity output coupling and absorption factors Qo and Qa, respectively. These Q’s are determined from linewidths calculated from Lorenz–Mie theory by using combinations of the real and complex indices of refraction. An experimental upper limit of Q for first-order modes was determined to be 108 from the data.

© 1991 Optical Society of America

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1991 (1)

A. J. Campillo, J. D. Eversole, H.-B. Lin, Phys. Rev. Lett. 67, 437 (1991).
[CrossRef] [PubMed]

1990 (4)

1989 (1)

1988 (1)

H. Chew, Phys. Rev. A 38, 3410 (1988); Phys. Rev. A 37, 4107 (1988).
[CrossRef] [PubMed]

1987 (1)

1986 (1)

1985 (1)

1984 (1)

1980 (1)

R. E. Benner, P. W. Barber, J. F. Owen, R. K. Chang, Phys. Rev. Lett. 44, 475 (1980).
[CrossRef]

1978 (1)

P. Chýlek, J. T. Kiehl, M. K. W. Ko, Phys. Rev. A 18, 2229 (1978).
[CrossRef]

1976 (1)

Armstrong, R. L.

Barber, P. W.

R. E. Benner, P. W. Barber, J. F. Owen, R. K. Chang, Phys. Rev. Lett. 44, 475 (1980).
[CrossRef]

Benner, R. E.

Biswas, A.

Campillo, A. J.

A. J. Campillo, J. D. Eversole, H.-B. Lin, Phys. Rev. Lett. 67, 437 (1991).
[CrossRef] [PubMed]

H.-B. Lin, J. D. Eversole, A. J. Campillo, Rev. Sci. Instrum. 61, 1018 (1990).
[CrossRef]

H.-B. Lin, J. D. Eversole, A. L. Huston, A. J. Campillo, J. Opt. Soc. Am. A 7, 2159 (1990).
[CrossRef]

H.-B. Lin, A. L. Huston, J. D. Eversole, A. J. Campillo, J. Opt. Soc. Am. B 7, 2079 (1990).
[CrossRef]

H.-B. Lin, A. L. Huston, J. D. Eversole, A. J. Campillo, Opt. Lett. 15, 1176 (1990).
[CrossRef] [PubMed]

J. D. Eversole, H.-B. Lin, A. J. Campillo, “Cavity-mode identification of fluorescence and lasing in dye-doped microdroplets,” Appl. Opt. (to be published).

Chang, R. K.

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

R. E. Benner, P. W. Barber, J. F. Owen, R. K. Chang, Phys. Rev. Lett. 44, 475 (1980).
[CrossRef]

Chew, H.

H. Chew, Phys. Rev. A 38, 3410 (1988); Phys. Rev. A 37, 4107 (1988).
[CrossRef] [PubMed]

Ching, S. C.

Chýlek, P.

P. Chýlek, J. T. Kiehl, M. K. W. Ko, Phys. Rev. A 18, 2229 (1978).
[CrossRef]

P. Chýlek, J. Opt. Soc. Am. 66, 285 (1976).
[CrossRef]

Conwell, P. R.

Eversole, J. D.

A. J. Campillo, J. D. Eversole, H.-B. Lin, Phys. Rev. Lett. 67, 437 (1991).
[CrossRef] [PubMed]

H.-B. Lin, J. D. Eversole, A. L. Huston, A. J. Campillo, J. Opt. Soc. Am. A 7, 2159 (1990).
[CrossRef]

H.-B. Lin, J. D. Eversole, A. J. Campillo, Rev. Sci. Instrum. 61, 1018 (1990).
[CrossRef]

H.-B. Lin, A. L. Huston, J. D. Eversole, A. J. Campillo, Opt. Lett. 15, 1176 (1990).
[CrossRef] [PubMed]

H.-B. Lin, A. L. Huston, J. D. Eversole, A. J. Campillo, J. Opt. Soc. Am. B 7, 2079 (1990).
[CrossRef]

J. D. Eversole, H.-B. Lin, A. J. Campillo, “Cavity-mode identification of fluorescence and lasing in dye-doped microdroplets,” Appl. Opt. (to be published).

Hill, S. C.

Huston, A. L.

Kiehl, J. T.

P. Chýlek, J. T. Kiehl, M. K. W. Ko, Phys. Rev. A 18, 2229 (1978).
[CrossRef]

Ko, M. K. W.

P. Chýlek, J. T. Kiehl, M. K. W. Ko, Phys. Rev. A 18, 2229 (1978).
[CrossRef]

Lai, H. M.

Latifi, H.

Lin, H.-B.

A. J. Campillo, J. D. Eversole, H.-B. Lin, Phys. Rev. Lett. 67, 437 (1991).
[CrossRef] [PubMed]

H.-B. Lin, J. D. Eversole, A. L. Huston, A. J. Campillo, J. Opt. Soc. Am. A 7, 2159 (1990).
[CrossRef]

H.-B. Lin, J. D. Eversole, A. J. Campillo, Rev. Sci. Instrum. 61, 1018 (1990).
[CrossRef]

H.-B. Lin, A. L. Huston, J. D. Eversole, A. J. Campillo, Opt. Lett. 15, 1176 (1990).
[CrossRef] [PubMed]

H.-B. Lin, A. L. Huston, J. D. Eversole, A. J. Campillo, J. Opt. Soc. Am. B 7, 2079 (1990).
[CrossRef]

J. D. Eversole, H.-B. Lin, A. J. Campillo, “Cavity-mode identification of fluorescence and lasing in dye-doped microdroplets,” Appl. Opt. (to be published).

Long, M. B.

Owen, J. F.

R. E. Benner, P. W. Barber, J. F. Owen, R. K. Chang, Phys. Rev. Lett. 44, 475 (1980).
[CrossRef]

Pinnick, R. G.

Rushforth, C. K.

Tzeng, H.-M.

van de Hulst, H. C.

H. C. van de Hulst, Light Scattering by Small Particles (Dover, New York, 1981).

Wall, K. F.

Young, K.

Appl. Opt. (1)

J. Opt. Soc. Am. (1)

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

J. Opt. Soc. Am. B (3)

Opt. Lett. (3)

Phys. Rev. A (2)

H. Chew, Phys. Rev. A 38, 3410 (1988); Phys. Rev. A 37, 4107 (1988).
[CrossRef] [PubMed]

P. Chýlek, J. T. Kiehl, M. K. W. Ko, Phys. Rev. A 18, 2229 (1978).
[CrossRef]

Phys. Rev. Lett. (2)

A. J. Campillo, J. D. Eversole, H.-B. Lin, Phys. Rev. Lett. 67, 437 (1991).
[CrossRef] [PubMed]

R. E. Benner, P. W. Barber, J. F. Owen, R. K. Chang, Phys. Rev. Lett. 44, 475 (1980).
[CrossRef]

Rev. Sci. Instrum. (1)

H.-B. Lin, J. D. Eversole, A. J. Campillo, Rev. Sci. Instrum. 61, 1018 (1990).
[CrossRef]

Other (2)

J. D. Eversole, H.-B. Lin, A. J. Campillo, “Cavity-mode identification of fluorescence and lasing in dye-doped microdroplets,” Appl. Opt. (to be published).

H. C. van de Hulst, Light Scattering by Small Particles (Dover, New York, 1981).

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Figures (2)

Fig. 1
Fig. 1

Emission spectra of 15-μm-diameter R6G/ethanol solution droplets for various droplet absorptions. Spectra (a) through (d) correspond to imaginary refractive indices of <10−9, 1.6 × 10−7, 8.2 × 10−7, and 2.7 × 10−6, respectively. Mode assignments of the various features are shown with arrows up (down) for TE (TM) modes having a principal mode number n and mode order l as indicated (n, l). Lower-order modes are quenched by absorption more readily than higher-order modes.

Fig. 2
Fig. 2

Plot of the droplet cavity efficiency ϕ = Qa/(Qo + Qa) versus the ratio Qo/Qa showing three characteristic emission regions (a)–(c) (see text). With the data of Fig. 1, the droplet cavity efficiency was verified to be proportional to the spectrally integrated emission intensity (see Table 3).

Tables (3)

Tables Icon

Table 1 Measured Absorbance A, Imaginary Refractive Index mi, and Estimated Qa′ Values for Experimental R6G/Ethanol/Nigrosin Solutions

Tables Icon

Table 2 Comparison of Calculated and Estimated Q’s (in Units of 104)

Tables Icon

Table 3 Predicted (Observed) Resonance Relative Intensities

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