Abstract

We have observed stimulated emission on the transitions 43S133PJ° near 518 nm following pulsed laser excitation of Mg vapor near the 31S033P1° resonance at 285 nm. The emission has a divergence similar to the pump laser and closely follows the incident laser in time. The mechanism apparently involves pumping an accidental coincidence 31S033P1° and 33PJ°53DJ, permitting depletion of the lower level of the triplet transition. Photoionization of the Mg vapor creates a large electron density (≲1013 cm−3); electron-impact collisions are presumed to mediate the process, transferring population from the laser-pumped 31P1° level to the triplet manifold.

© 1985 Optical Society of America

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  1. P. Rabinowitz, S. Jacobs, and G. Gould, “Continuous optically pumped Cs laser,” Appl. Opt. 1, 513–516 (1962).
    [CrossRef]
  2. P. P. Sorokin and J. R. Lankard, “Infrared lasers resulting from giant pulse laser excitation of alkali metal molecules,” J. Chem. Phys. 54, 2184–2190 (1971).
    [CrossRef]
  3. A. Sharma, N. D. Bhaskar, Y. Q. Lu, and W. Happer, “Continuous-wave mirrorless lasing in optically pumped atomic Cs and Rb vapors,” Appl. Phys. Lett. 39, 209–211 (1981).
    [CrossRef]
  4. V. V. Lebedev, A. S. Provorov, B. I. Troshin, A. A. Chernenko, and V. P. Chebotaev, “Magnesium vapor emission at λ = 518 nm with resonant pumping,” Sov. Tech. Phys. Lett. 6, 585–586 (1980).
  5. A. N. Nesmeyanov, Vapor Pressure of the Elements (Academic, New York, 1963).
  6. J. J. Wynne and P. P. Sorokin, “Optical mixing in atomic vapors,” in Nonlinear Infrared Generation, Y. R. Shen, ed. (Springer-Verlag, Berlin, 1977).
    [CrossRef]
  7. C. H. Skinner and P. D. Kleiber, “Observation of anomalous conical emission from laser-excited barium vapor,” Phys. Rev. A 21, 151–156 (1980).
    [CrossRef]
  8. C. H. Skinner, “Efficient ionization of calcium, strontium and barium by resonant laser pumping,” J. Phys. B 13, 55–68 (1980).
    [CrossRef]
  9. A. T. Pritt, D. Patel, and D. J. Benard, “The self-annihilation rate of metastable Mg atoms,” Chem. Phys. Lett. 105, 667–671 (1984).
    [CrossRef]
  10. H. Scheingraber and C. R. Vidal, “Discrete and continuous Franck–Condon factors of the Mg2 A 1Σu+−X 1Σg+ system and their γ dependence,” J. Chem. Phys. 66, 3694–3704 (1977).
    [CrossRef]
  11. A. Burgess and M. J. Seaton, “A general formula for the calculation of atomic photo-ionization cross sections,” Mon. Not. R. Astron. Soc. 120, 121–124 (1959);G. Peach, “A revised general formula for the calculation of atomic photoionization cross sections,” Mem. R. Astron. Soc. 71, 13–27 (1967).
  12. J. L. F. de Meijere and J. H. Eberly, “Role of resonant two-photon ionization in the presence of a partially coherent radiation field,” Phys. Rev. A 17, 1416–1430 (1978).
    [CrossRef]
  13. D. Rassi, V. Pejcev, T. W. Ottley, and K. J. Ross, “High-resolution ejected-electron spectrum of magnesium autoionizing levels following two-electron excitation by low-energy electron impact,” J. Phys. B 10, 2913–2921 (1977);P. G. Burke and D. L. Moores, “Scattering of electrons by Mg+ and Ca+ ions,” J. Phys. B 1, 575–585 (1968).
    [CrossRef]
  14. T. B. Lucatorto and T. J. McIlrath, “Efficient laser production of a Na+ ground-state plasma column: absorption spectroscopy and photoionization measurement of Na+,” Phys. Rev. Lett. 37, 428–431 (1976).
    [CrossRef]
  15. L. I. Gudzenko and L. A. Shelepin, “Negative absorption in a nonequilibrium hydrogen plasma,” Sov. Phys. JETP 18, 998–1000 (1964).
  16. B. F. Gordiets, L. I. Gudzenko, and L. A. Shelepin, “Relaxation processes and amplification of radiation in a dense plasma,” Sov. Phys. JETP 28, 489–493 (1969).
  17. W. T. Silfvast, L. H. Szeto, and O. R. Wood, “CO2-laser-produced plasma-initiated neutral-gas recombination lasers,” J. Appl. Phys. 50, 7921–7928 (1979).
    [CrossRef]
  18. E. M. Campbell, R. G. Jahn, W. F. von Jaskowsky, and K. E. Clark, “Recombination lasing in a magnetoplasmadynamic arcjet,” J. Appl. Phys. 51, 109–117 (1980).
    [CrossRef]
  19. W. C. Fon, K. A. Berrington, P. G. Burke, and A. E. Kingston, “Total cross sections for electron excitation transitions between the 11S, 23S, 21S, 23P and 21P states of atomic helium,” J. Phys. B 14, 2921–2934 (1981).
    [CrossRef]
  20. W. L. Wiese, M. W. Smith, and B. M. Miles, Atomic Transition Probabilities, VII, Nat. Stand. Ref. Data Ser. Nat. Bur. Stand. 22, 25–28 (1969).
  21. O. I. Zatsarinny, V. I. Lengyel, V. T. Navrotsky, E. P. Sabad, and M. Salak, “Autoionizing states of a Mg atom,” in Proceedings of XIII International Conference on the Physics of Electronic and Atomic Collisions, J. Eichler, W. Fritsch, I. V. Hertel, N. Stolterfoht, and U. Wille, eds. (North-Holland, New York, 1983).

1984 (1)

A. T. Pritt, D. Patel, and D. J. Benard, “The self-annihilation rate of metastable Mg atoms,” Chem. Phys. Lett. 105, 667–671 (1984).
[CrossRef]

1981 (2)

A. Sharma, N. D. Bhaskar, Y. Q. Lu, and W. Happer, “Continuous-wave mirrorless lasing in optically pumped atomic Cs and Rb vapors,” Appl. Phys. Lett. 39, 209–211 (1981).
[CrossRef]

W. C. Fon, K. A. Berrington, P. G. Burke, and A. E. Kingston, “Total cross sections for electron excitation transitions between the 11S, 23S, 21S, 23P and 21P states of atomic helium,” J. Phys. B 14, 2921–2934 (1981).
[CrossRef]

1980 (4)

V. V. Lebedev, A. S. Provorov, B. I. Troshin, A. A. Chernenko, and V. P. Chebotaev, “Magnesium vapor emission at λ = 518 nm with resonant pumping,” Sov. Tech. Phys. Lett. 6, 585–586 (1980).

C. H. Skinner and P. D. Kleiber, “Observation of anomalous conical emission from laser-excited barium vapor,” Phys. Rev. A 21, 151–156 (1980).
[CrossRef]

C. H. Skinner, “Efficient ionization of calcium, strontium and barium by resonant laser pumping,” J. Phys. B 13, 55–68 (1980).
[CrossRef]

E. M. Campbell, R. G. Jahn, W. F. von Jaskowsky, and K. E. Clark, “Recombination lasing in a magnetoplasmadynamic arcjet,” J. Appl. Phys. 51, 109–117 (1980).
[CrossRef]

1979 (1)

W. T. Silfvast, L. H. Szeto, and O. R. Wood, “CO2-laser-produced plasma-initiated neutral-gas recombination lasers,” J. Appl. Phys. 50, 7921–7928 (1979).
[CrossRef]

1978 (1)

J. L. F. de Meijere and J. H. Eberly, “Role of resonant two-photon ionization in the presence of a partially coherent radiation field,” Phys. Rev. A 17, 1416–1430 (1978).
[CrossRef]

1977 (2)

D. Rassi, V. Pejcev, T. W. Ottley, and K. J. Ross, “High-resolution ejected-electron spectrum of magnesium autoionizing levels following two-electron excitation by low-energy electron impact,” J. Phys. B 10, 2913–2921 (1977);P. G. Burke and D. L. Moores, “Scattering of electrons by Mg+ and Ca+ ions,” J. Phys. B 1, 575–585 (1968).
[CrossRef]

H. Scheingraber and C. R. Vidal, “Discrete and continuous Franck–Condon factors of the Mg2 A 1Σu+−X 1Σg+ system and their γ dependence,” J. Chem. Phys. 66, 3694–3704 (1977).
[CrossRef]

1976 (1)

T. B. Lucatorto and T. J. McIlrath, “Efficient laser production of a Na+ ground-state plasma column: absorption spectroscopy and photoionization measurement of Na+,” Phys. Rev. Lett. 37, 428–431 (1976).
[CrossRef]

1971 (1)

P. P. Sorokin and J. R. Lankard, “Infrared lasers resulting from giant pulse laser excitation of alkali metal molecules,” J. Chem. Phys. 54, 2184–2190 (1971).
[CrossRef]

1969 (2)

B. F. Gordiets, L. I. Gudzenko, and L. A. Shelepin, “Relaxation processes and amplification of radiation in a dense plasma,” Sov. Phys. JETP 28, 489–493 (1969).

W. L. Wiese, M. W. Smith, and B. M. Miles, Atomic Transition Probabilities, VII, Nat. Stand. Ref. Data Ser. Nat. Bur. Stand. 22, 25–28 (1969).

1964 (1)

L. I. Gudzenko and L. A. Shelepin, “Negative absorption in a nonequilibrium hydrogen plasma,” Sov. Phys. JETP 18, 998–1000 (1964).

1962 (1)

1959 (1)

A. Burgess and M. J. Seaton, “A general formula for the calculation of atomic photo-ionization cross sections,” Mon. Not. R. Astron. Soc. 120, 121–124 (1959);G. Peach, “A revised general formula for the calculation of atomic photoionization cross sections,” Mem. R. Astron. Soc. 71, 13–27 (1967).

Benard, D. J.

A. T. Pritt, D. Patel, and D. J. Benard, “The self-annihilation rate of metastable Mg atoms,” Chem. Phys. Lett. 105, 667–671 (1984).
[CrossRef]

Berrington, K. A.

W. C. Fon, K. A. Berrington, P. G. Burke, and A. E. Kingston, “Total cross sections for electron excitation transitions between the 11S, 23S, 21S, 23P and 21P states of atomic helium,” J. Phys. B 14, 2921–2934 (1981).
[CrossRef]

Bhaskar, N. D.

A. Sharma, N. D. Bhaskar, Y. Q. Lu, and W. Happer, “Continuous-wave mirrorless lasing in optically pumped atomic Cs and Rb vapors,” Appl. Phys. Lett. 39, 209–211 (1981).
[CrossRef]

Burgess, A.

A. Burgess and M. J. Seaton, “A general formula for the calculation of atomic photo-ionization cross sections,” Mon. Not. R. Astron. Soc. 120, 121–124 (1959);G. Peach, “A revised general formula for the calculation of atomic photoionization cross sections,” Mem. R. Astron. Soc. 71, 13–27 (1967).

Burke, P. G.

W. C. Fon, K. A. Berrington, P. G. Burke, and A. E. Kingston, “Total cross sections for electron excitation transitions between the 11S, 23S, 21S, 23P and 21P states of atomic helium,” J. Phys. B 14, 2921–2934 (1981).
[CrossRef]

Campbell, E. M.

E. M. Campbell, R. G. Jahn, W. F. von Jaskowsky, and K. E. Clark, “Recombination lasing in a magnetoplasmadynamic arcjet,” J. Appl. Phys. 51, 109–117 (1980).
[CrossRef]

Chebotaev, V. P.

V. V. Lebedev, A. S. Provorov, B. I. Troshin, A. A. Chernenko, and V. P. Chebotaev, “Magnesium vapor emission at λ = 518 nm with resonant pumping,” Sov. Tech. Phys. Lett. 6, 585–586 (1980).

Chernenko, A. A.

V. V. Lebedev, A. S. Provorov, B. I. Troshin, A. A. Chernenko, and V. P. Chebotaev, “Magnesium vapor emission at λ = 518 nm with resonant pumping,” Sov. Tech. Phys. Lett. 6, 585–586 (1980).

Clark, K. E.

E. M. Campbell, R. G. Jahn, W. F. von Jaskowsky, and K. E. Clark, “Recombination lasing in a magnetoplasmadynamic arcjet,” J. Appl. Phys. 51, 109–117 (1980).
[CrossRef]

de Meijere, J. L. F.

J. L. F. de Meijere and J. H. Eberly, “Role of resonant two-photon ionization in the presence of a partially coherent radiation field,” Phys. Rev. A 17, 1416–1430 (1978).
[CrossRef]

Eberly, J. H.

J. L. F. de Meijere and J. H. Eberly, “Role of resonant two-photon ionization in the presence of a partially coherent radiation field,” Phys. Rev. A 17, 1416–1430 (1978).
[CrossRef]

Fon, W. C.

W. C. Fon, K. A. Berrington, P. G. Burke, and A. E. Kingston, “Total cross sections for electron excitation transitions between the 11S, 23S, 21S, 23P and 21P states of atomic helium,” J. Phys. B 14, 2921–2934 (1981).
[CrossRef]

Gordiets, B. F.

B. F. Gordiets, L. I. Gudzenko, and L. A. Shelepin, “Relaxation processes and amplification of radiation in a dense plasma,” Sov. Phys. JETP 28, 489–493 (1969).

Gould, G.

Gudzenko, L. I.

B. F. Gordiets, L. I. Gudzenko, and L. A. Shelepin, “Relaxation processes and amplification of radiation in a dense plasma,” Sov. Phys. JETP 28, 489–493 (1969).

L. I. Gudzenko and L. A. Shelepin, “Negative absorption in a nonequilibrium hydrogen plasma,” Sov. Phys. JETP 18, 998–1000 (1964).

Happer, W.

A. Sharma, N. D. Bhaskar, Y. Q. Lu, and W. Happer, “Continuous-wave mirrorless lasing in optically pumped atomic Cs and Rb vapors,” Appl. Phys. Lett. 39, 209–211 (1981).
[CrossRef]

Jacobs, S.

Jahn, R. G.

E. M. Campbell, R. G. Jahn, W. F. von Jaskowsky, and K. E. Clark, “Recombination lasing in a magnetoplasmadynamic arcjet,” J. Appl. Phys. 51, 109–117 (1980).
[CrossRef]

Kingston, A. E.

W. C. Fon, K. A. Berrington, P. G. Burke, and A. E. Kingston, “Total cross sections for electron excitation transitions between the 11S, 23S, 21S, 23P and 21P states of atomic helium,” J. Phys. B 14, 2921–2934 (1981).
[CrossRef]

Kleiber, P. D.

C. H. Skinner and P. D. Kleiber, “Observation of anomalous conical emission from laser-excited barium vapor,” Phys. Rev. A 21, 151–156 (1980).
[CrossRef]

Lankard, J. R.

P. P. Sorokin and J. R. Lankard, “Infrared lasers resulting from giant pulse laser excitation of alkali metal molecules,” J. Chem. Phys. 54, 2184–2190 (1971).
[CrossRef]

Lebedev, V. V.

V. V. Lebedev, A. S. Provorov, B. I. Troshin, A. A. Chernenko, and V. P. Chebotaev, “Magnesium vapor emission at λ = 518 nm with resonant pumping,” Sov. Tech. Phys. Lett. 6, 585–586 (1980).

Lengyel, V. I.

O. I. Zatsarinny, V. I. Lengyel, V. T. Navrotsky, E. P. Sabad, and M. Salak, “Autoionizing states of a Mg atom,” in Proceedings of XIII International Conference on the Physics of Electronic and Atomic Collisions, J. Eichler, W. Fritsch, I. V. Hertel, N. Stolterfoht, and U. Wille, eds. (North-Holland, New York, 1983).

Lu, Y. Q.

A. Sharma, N. D. Bhaskar, Y. Q. Lu, and W. Happer, “Continuous-wave mirrorless lasing in optically pumped atomic Cs and Rb vapors,” Appl. Phys. Lett. 39, 209–211 (1981).
[CrossRef]

Lucatorto, T. B.

T. B. Lucatorto and T. J. McIlrath, “Efficient laser production of a Na+ ground-state plasma column: absorption spectroscopy and photoionization measurement of Na+,” Phys. Rev. Lett. 37, 428–431 (1976).
[CrossRef]

McIlrath, T. J.

T. B. Lucatorto and T. J. McIlrath, “Efficient laser production of a Na+ ground-state plasma column: absorption spectroscopy and photoionization measurement of Na+,” Phys. Rev. Lett. 37, 428–431 (1976).
[CrossRef]

Miles, B. M.

W. L. Wiese, M. W. Smith, and B. M. Miles, Atomic Transition Probabilities, VII, Nat. Stand. Ref. Data Ser. Nat. Bur. Stand. 22, 25–28 (1969).

Navrotsky, V. T.

O. I. Zatsarinny, V. I. Lengyel, V. T. Navrotsky, E. P. Sabad, and M. Salak, “Autoionizing states of a Mg atom,” in Proceedings of XIII International Conference on the Physics of Electronic and Atomic Collisions, J. Eichler, W. Fritsch, I. V. Hertel, N. Stolterfoht, and U. Wille, eds. (North-Holland, New York, 1983).

Nesmeyanov, A. N.

A. N. Nesmeyanov, Vapor Pressure of the Elements (Academic, New York, 1963).

Ottley, T. W.

D. Rassi, V. Pejcev, T. W. Ottley, and K. J. Ross, “High-resolution ejected-electron spectrum of magnesium autoionizing levels following two-electron excitation by low-energy electron impact,” J. Phys. B 10, 2913–2921 (1977);P. G. Burke and D. L. Moores, “Scattering of electrons by Mg+ and Ca+ ions,” J. Phys. B 1, 575–585 (1968).
[CrossRef]

Patel, D.

A. T. Pritt, D. Patel, and D. J. Benard, “The self-annihilation rate of metastable Mg atoms,” Chem. Phys. Lett. 105, 667–671 (1984).
[CrossRef]

Pejcev, V.

D. Rassi, V. Pejcev, T. W. Ottley, and K. J. Ross, “High-resolution ejected-electron spectrum of magnesium autoionizing levels following two-electron excitation by low-energy electron impact,” J. Phys. B 10, 2913–2921 (1977);P. G. Burke and D. L. Moores, “Scattering of electrons by Mg+ and Ca+ ions,” J. Phys. B 1, 575–585 (1968).
[CrossRef]

Pritt, A. T.

A. T. Pritt, D. Patel, and D. J. Benard, “The self-annihilation rate of metastable Mg atoms,” Chem. Phys. Lett. 105, 667–671 (1984).
[CrossRef]

Provorov, A. S.

V. V. Lebedev, A. S. Provorov, B. I. Troshin, A. A. Chernenko, and V. P. Chebotaev, “Magnesium vapor emission at λ = 518 nm with resonant pumping,” Sov. Tech. Phys. Lett. 6, 585–586 (1980).

Rabinowitz, P.

Rassi, D.

D. Rassi, V. Pejcev, T. W. Ottley, and K. J. Ross, “High-resolution ejected-electron spectrum of magnesium autoionizing levels following two-electron excitation by low-energy electron impact,” J. Phys. B 10, 2913–2921 (1977);P. G. Burke and D. L. Moores, “Scattering of electrons by Mg+ and Ca+ ions,” J. Phys. B 1, 575–585 (1968).
[CrossRef]

Ross, K. J.

D. Rassi, V. Pejcev, T. W. Ottley, and K. J. Ross, “High-resolution ejected-electron spectrum of magnesium autoionizing levels following two-electron excitation by low-energy electron impact,” J. Phys. B 10, 2913–2921 (1977);P. G. Burke and D. L. Moores, “Scattering of electrons by Mg+ and Ca+ ions,” J. Phys. B 1, 575–585 (1968).
[CrossRef]

Sabad, E. P.

O. I. Zatsarinny, V. I. Lengyel, V. T. Navrotsky, E. P. Sabad, and M. Salak, “Autoionizing states of a Mg atom,” in Proceedings of XIII International Conference on the Physics of Electronic and Atomic Collisions, J. Eichler, W. Fritsch, I. V. Hertel, N. Stolterfoht, and U. Wille, eds. (North-Holland, New York, 1983).

Salak, M.

O. I. Zatsarinny, V. I. Lengyel, V. T. Navrotsky, E. P. Sabad, and M. Salak, “Autoionizing states of a Mg atom,” in Proceedings of XIII International Conference on the Physics of Electronic and Atomic Collisions, J. Eichler, W. Fritsch, I. V. Hertel, N. Stolterfoht, and U. Wille, eds. (North-Holland, New York, 1983).

Scheingraber, H.

H. Scheingraber and C. R. Vidal, “Discrete and continuous Franck–Condon factors of the Mg2 A 1Σu+−X 1Σg+ system and their γ dependence,” J. Chem. Phys. 66, 3694–3704 (1977).
[CrossRef]

Seaton, M. J.

A. Burgess and M. J. Seaton, “A general formula for the calculation of atomic photo-ionization cross sections,” Mon. Not. R. Astron. Soc. 120, 121–124 (1959);G. Peach, “A revised general formula for the calculation of atomic photoionization cross sections,” Mem. R. Astron. Soc. 71, 13–27 (1967).

Sharma, A.

A. Sharma, N. D. Bhaskar, Y. Q. Lu, and W. Happer, “Continuous-wave mirrorless lasing in optically pumped atomic Cs and Rb vapors,” Appl. Phys. Lett. 39, 209–211 (1981).
[CrossRef]

Shelepin, L. A.

B. F. Gordiets, L. I. Gudzenko, and L. A. Shelepin, “Relaxation processes and amplification of radiation in a dense plasma,” Sov. Phys. JETP 28, 489–493 (1969).

L. I. Gudzenko and L. A. Shelepin, “Negative absorption in a nonequilibrium hydrogen plasma,” Sov. Phys. JETP 18, 998–1000 (1964).

Silfvast, W. T.

W. T. Silfvast, L. H. Szeto, and O. R. Wood, “CO2-laser-produced plasma-initiated neutral-gas recombination lasers,” J. Appl. Phys. 50, 7921–7928 (1979).
[CrossRef]

Skinner, C. H.

C. H. Skinner, “Efficient ionization of calcium, strontium and barium by resonant laser pumping,” J. Phys. B 13, 55–68 (1980).
[CrossRef]

C. H. Skinner and P. D. Kleiber, “Observation of anomalous conical emission from laser-excited barium vapor,” Phys. Rev. A 21, 151–156 (1980).
[CrossRef]

Smith, M. W.

W. L. Wiese, M. W. Smith, and B. M. Miles, Atomic Transition Probabilities, VII, Nat. Stand. Ref. Data Ser. Nat. Bur. Stand. 22, 25–28 (1969).

Sorokin, P. P.

P. P. Sorokin and J. R. Lankard, “Infrared lasers resulting from giant pulse laser excitation of alkali metal molecules,” J. Chem. Phys. 54, 2184–2190 (1971).
[CrossRef]

J. J. Wynne and P. P. Sorokin, “Optical mixing in atomic vapors,” in Nonlinear Infrared Generation, Y. R. Shen, ed. (Springer-Verlag, Berlin, 1977).
[CrossRef]

Szeto, L. H.

W. T. Silfvast, L. H. Szeto, and O. R. Wood, “CO2-laser-produced plasma-initiated neutral-gas recombination lasers,” J. Appl. Phys. 50, 7921–7928 (1979).
[CrossRef]

Troshin, B. I.

V. V. Lebedev, A. S. Provorov, B. I. Troshin, A. A. Chernenko, and V. P. Chebotaev, “Magnesium vapor emission at λ = 518 nm with resonant pumping,” Sov. Tech. Phys. Lett. 6, 585–586 (1980).

Vidal, C. R.

H. Scheingraber and C. R. Vidal, “Discrete and continuous Franck–Condon factors of the Mg2 A 1Σu+−X 1Σg+ system and their γ dependence,” J. Chem. Phys. 66, 3694–3704 (1977).
[CrossRef]

von Jaskowsky, W. F.

E. M. Campbell, R. G. Jahn, W. F. von Jaskowsky, and K. E. Clark, “Recombination lasing in a magnetoplasmadynamic arcjet,” J. Appl. Phys. 51, 109–117 (1980).
[CrossRef]

Wiese, W. L.

W. L. Wiese, M. W. Smith, and B. M. Miles, Atomic Transition Probabilities, VII, Nat. Stand. Ref. Data Ser. Nat. Bur. Stand. 22, 25–28 (1969).

Wood, O. R.

W. T. Silfvast, L. H. Szeto, and O. R. Wood, “CO2-laser-produced plasma-initiated neutral-gas recombination lasers,” J. Appl. Phys. 50, 7921–7928 (1979).
[CrossRef]

Wynne, J. J.

J. J. Wynne and P. P. Sorokin, “Optical mixing in atomic vapors,” in Nonlinear Infrared Generation, Y. R. Shen, ed. (Springer-Verlag, Berlin, 1977).
[CrossRef]

Zatsarinny, O. I.

O. I. Zatsarinny, V. I. Lengyel, V. T. Navrotsky, E. P. Sabad, and M. Salak, “Autoionizing states of a Mg atom,” in Proceedings of XIII International Conference on the Physics of Electronic and Atomic Collisions, J. Eichler, W. Fritsch, I. V. Hertel, N. Stolterfoht, and U. Wille, eds. (North-Holland, New York, 1983).

Appl. Opt. (1)

Appl. Phys. Lett. (1)

A. Sharma, N. D. Bhaskar, Y. Q. Lu, and W. Happer, “Continuous-wave mirrorless lasing in optically pumped atomic Cs and Rb vapors,” Appl. Phys. Lett. 39, 209–211 (1981).
[CrossRef]

Atomic Transition Probabilities, VII (1)

W. L. Wiese, M. W. Smith, and B. M. Miles, Atomic Transition Probabilities, VII, Nat. Stand. Ref. Data Ser. Nat. Bur. Stand. 22, 25–28 (1969).

Chem. Phys. Lett. (1)

A. T. Pritt, D. Patel, and D. J. Benard, “The self-annihilation rate of metastable Mg atoms,” Chem. Phys. Lett. 105, 667–671 (1984).
[CrossRef]

J. Appl. Phys. (2)

W. T. Silfvast, L. H. Szeto, and O. R. Wood, “CO2-laser-produced plasma-initiated neutral-gas recombination lasers,” J. Appl. Phys. 50, 7921–7928 (1979).
[CrossRef]

E. M. Campbell, R. G. Jahn, W. F. von Jaskowsky, and K. E. Clark, “Recombination lasing in a magnetoplasmadynamic arcjet,” J. Appl. Phys. 51, 109–117 (1980).
[CrossRef]

J. Chem. Phys. (2)

H. Scheingraber and C. R. Vidal, “Discrete and continuous Franck–Condon factors of the Mg2 A 1Σu+−X 1Σg+ system and their γ dependence,” J. Chem. Phys. 66, 3694–3704 (1977).
[CrossRef]

P. P. Sorokin and J. R. Lankard, “Infrared lasers resulting from giant pulse laser excitation of alkali metal molecules,” J. Chem. Phys. 54, 2184–2190 (1971).
[CrossRef]

J. Phys. B (3)

C. H. Skinner, “Efficient ionization of calcium, strontium and barium by resonant laser pumping,” J. Phys. B 13, 55–68 (1980).
[CrossRef]

D. Rassi, V. Pejcev, T. W. Ottley, and K. J. Ross, “High-resolution ejected-electron spectrum of magnesium autoionizing levels following two-electron excitation by low-energy electron impact,” J. Phys. B 10, 2913–2921 (1977);P. G. Burke and D. L. Moores, “Scattering of electrons by Mg+ and Ca+ ions,” J. Phys. B 1, 575–585 (1968).
[CrossRef]

W. C. Fon, K. A. Berrington, P. G. Burke, and A. E. Kingston, “Total cross sections for electron excitation transitions between the 11S, 23S, 21S, 23P and 21P states of atomic helium,” J. Phys. B 14, 2921–2934 (1981).
[CrossRef]

Mon. Not. R. Astron. Soc. (1)

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Phys. Rev. A (2)

J. L. F. de Meijere and J. H. Eberly, “Role of resonant two-photon ionization in the presence of a partially coherent radiation field,” Phys. Rev. A 17, 1416–1430 (1978).
[CrossRef]

C. H. Skinner and P. D. Kleiber, “Observation of anomalous conical emission from laser-excited barium vapor,” Phys. Rev. A 21, 151–156 (1980).
[CrossRef]

Phys. Rev. Lett. (1)

T. B. Lucatorto and T. J. McIlrath, “Efficient laser production of a Na+ ground-state plasma column: absorption spectroscopy and photoionization measurement of Na+,” Phys. Rev. Lett. 37, 428–431 (1976).
[CrossRef]

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[CrossRef]

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Figures (3)

Fig. 1
Fig. 1

Time development of (a) pump-laser pulse and (b) stimulated green emission pulse with the laser tuned to 285.17 nm, [Mg] = 2 × 1015 cm −3, and laser power ∼50 MW/cm2.

Fig. 2
Fig. 2

Mg atomic-energy levels and relevant transitions.

Fig. 3
Fig. 3

Dependence of the green emission intensity of Mg density and pump-laser power. Circles, intensity of the green emission as a function of laser power at fixed Mg density (2 × 1015 cm−3). Boxes, green emission intensity as a function of Mg density with fixed laser power (∼10 MW/cm2). Full laser power is ∼50 MW/cm2 but is uncertain because of the effects of self-focusing.

Equations (7)

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He * ( 2 3 P ) + e He * ( 2 1 P ) + e
He * ( 2 3 S ) + e He * ( 2 1 P ) + e ,
N e [ Mg * ( 3 1 P 1 ° ) ] σ υ τ p 1 × 10 12 / cm 3 pulse .
Δ N = N ( 4 3 S ) N ( 3 3 P ) = N ( 3 1 P ) { N e k ( 3 1 P 4 3 S ) N e k ( 3 3 P 3 3 P ) + Γ + R ( 4 3 S ) N e k ( 3 1 P 3 3 P ) N e k ( 3 3 P 3 1 P ) + R ( 3 3 P ) Γ N e k ( 3 3 P 3 1 P ) + R ( 3 3 P ) × [ N e k ( 3 1 P 4 3 S ) N e k ( 3 3 S 3 1 P ) + Γ + R ( 4 3 S ) ] }
Δ N = N ( 4 3 S ) N ( 3 3 P ) = N ( 3 1 P ) [ N e k ( 3 1 P 4 3 S ) R ( 4 3 S ) N e k ( 3 1 P 3 3 P ) R ( 3 3 P ) ]
N e k ( 3 1 P 4 3 S ) R ( 4 3 S ) > N e k ( 3 1 P 3 3 P ) R ( 3 3 P ) .
g = λ 2 8 π 1 τ N γ D Δ N ,

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