Steady magnetic field generation due to transient field ionization in ultrashort laser-solid interaction

Andrea Macchi; Enrique Conejero Jarque; Dieter Bauer; Fulvio Cornolti; Luis Plaja

doi:10.1103/PhysRevE.59.R36

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Steady magnetic field generation due to transient field ionization in ultrashort laser-solid interaction

Andrea Macchi^1,2, Enrique Conejero Jarque³, Dieter Bauer⁴, Fulvio Cornolti^2,5, and Luis Plaja³

¹Scuola Normale Superiore, Piazza dei Cavalieri 7, 56100 Pisa, Italy
²Istituto Nazionale Fisica della Materia, Sezione A, Universitá di Pisa, Pisa, Italy
³Departamento de Física Aplicada, Universidad de Salamanca, 37008 Salamanca, Spain
⁴Theoretische Quantenelektronik, TU-Darmstadt, Hochschulstrasse 4A, 64289 Darmstadt, Germany
⁵Dipartimento di Fisica, Universitá di Pisa, Piazza Torricelli 2, 56123 Pisa, Italy

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Phys. Rev. E 59, R36(R) – Published 1 January, 1999

DOI: https://doi.org/10.1103/PhysRevE.59.R36

Abstract

Using particle-in-cell simulations we show that a steady, megagauss magnetic field can be generated due to ionization dephasing in the interaction of an ultrashort laser pulse with a dielectric target. The magnetic field amplitude is limited by the screening of the laser-produced plasma and depends upon the ionization threshold of the target material rather than the laser intensity.

References (19)

M. Lontano, G. Lampis, A. V. Kim, and A. M. Sergeev, Phys. Scr. T63, 141 (1996); A. M. Sergeev et al., in Superstrong Fields in Plasmas, Varenna, Italy, 1997, Proceedings of the First International Conference, edited by M. Lontano et al., AIP Conf. Proc. No. 426 (AIP, New York, 1998), p15..
S. Backus et al., Opt. Lett. 18, 134 (1993); ibid.D. M. Gold, 19, 2006 (1994).
V. Malyshev, E. Conejero Jarque, and L. Roso, J. Opt. Soc. Am. B 14, 163 (1997); E. Conejero Jarque and L. Plaja (unpublished).
D. Bauer, R. Salomaa, and P. Mulser, Phys. Rev. E 58, 2436 (1998).
S. V. Bulanov, A. Macchi, and F. Pegoraro, Phys. Lett. A 245, 439 (1998).
D. Giulietti et al., Phys. Rev. Lett. 79, 3194 (1997).
J. Fuchs et al., Phys. Rev. Lett. 80, 2326 (1998).
H. Ruhl, F. Cornolti, and A. Macchi (unpublished).
D. Teychenné, A. Giulietti, D. Giulietti, and L. A. Gizzi, Phys. Rev. E 58, R1245 (1998).
S. C. Wilks, J. M. Dawson, and W. B. Mori, Phys. Rev. Lett. 61, 337 (1988).
R. N. Sudan, Phys. Rev. Lett. 70, 3075 (1993); H. Ruhl and P. Mulser, Phys. Lett. A 205, 388 (1995); M. G. Haines, Phys. Rev. Lett. 78, 254 (1997).
F. Cornolti, P. Mulser, and M. Hahn, Laser Part. Beams 9, 465 (1991).
To convert into practical units, the atomic unit values of electric and magnetic field, frequency, and density are $E_{a . u .} {= 5.1 \times 10}^{9} {V cm}^{- 1};$ $B_{a . u .} {= 17.1 \times 10}^{6} G;$ $ω_{a . u .} {= 4.1 \times 10}^{16} \sec^{- 1};$ ${(n}_{e})_{a . u .} {= 6.7 \times 10}^{24} {cm}^{- 3} .$ The laser intensity corresponding to $E_{a . u .}$ is $3.5 \times 10^{16} {W cm}^{- 2} .$
D. Bauer and P. Mulser, Phys. Rev. A59, 569 (1999).
D. Bauer, Phys. Rev. A 55, 2180 (1997).
F. Cornolti, A. Macchi, and E. Conejero Jarque, in SuperStrong Fields in Plasmas, Ref. [1], p. 55.
P. Mulser, F. Cornolti, and D. Bauer, Phys. Plasmas 5, 4466 (1998).
These approximate unequalities overestimate both the surface and the threshold field. The surface field, however, should be increased with respect to the steady state value during the transient phase because of absorption increase by ionization dephasing [12].
Mathematically, the boundary conditions of the WDM model are those of an initial-value problem, while the present case corresponds rather to a boundary-value problem.

[c1] M. Lontano, G. Lampis, A. V. Kim, and A. M. Sergeev, Phys. Scr. T63, 141 (1996); A. M. Sergeev et al., in Superstrong Fields in Plasmas, Varenna, Italy, 1997, Proceedings of the First International Conference, edited by M. Lontano et al., AIP Conf. Proc. No. 426 (AIP, New York, 1998), p15..

[c2] S. Backus et al., Opt. Lett. 18, 134 (1993); ibid.D. M. Gold, 19, 2006 (1994).

[c3] V. Malyshev, E. Conejero Jarque, and L. Roso, J. Opt. Soc. Am. B 14, 163 (1997); E. Conejero Jarque and L. Plaja (unpublished).

[c4] D. Bauer, R. Salomaa, and P. Mulser, Phys. Rev. E 58, 2436 (1998).

[c5] S. V. Bulanov, A. Macchi, and F. Pegoraro, Phys. Lett. A 245, 439 (1998).

[c6] D. Giulietti et al., Phys. Rev. Lett. 79, 3194 (1997).

[c7] J. Fuchs et al., Phys. Rev. Lett. 80, 2326 (1998).

[c8] H. Ruhl, F. Cornolti, and A. Macchi (unpublished).

[c9] D. Teychenné, A. Giulietti, D. Giulietti, and L. A. Gizzi, Phys. Rev. E 58, R1245 (1998).

[c10] S. C. Wilks, J. M. Dawson, and W. B. Mori, Phys. Rev. Lett. 61, 337 (1988).

[c11] R. N. Sudan, Phys. Rev. Lett. 70, 3075 (1993); H. Ruhl and P. Mulser, Phys. Lett. A 205, 388 (1995); M. G. Haines, Phys. Rev. Lett. 78, 254 (1997).

[c12] F. Cornolti, P. Mulser, and M. Hahn, Laser Part. Beams 9, 465 (1991).

[c13] To convert into practical units, the atomic unit values of electric and magnetic field, frequency, and density are $E_{a . u .} {= 5.1 \times 10}^{9} {V cm}^{- 1};$ $B_{a . u .} {= 17.1 \times 10}^{6} G;$ $ω_{a . u .} {= 4.1 \times 10}^{16} \sec^{- 1};$ ${(n}_{e})_{a . u .} {= 6.7 \times 10}^{24} {cm}^{- 3} .$ The laser intensity corresponding to $E_{a . u .}$ is $3.5 \times 10^{16} {W cm}^{- 2} .$

[c14] D. Bauer and P. Mulser, Phys. Rev. A59, 569 (1999).

[c15] D. Bauer, Phys. Rev. A 55, 2180 (1997).

[c16] F. Cornolti, A. Macchi, and E. Conejero Jarque, in SuperStrong Fields in Plasmas, Ref. [1], p. 55.

[c17] P. Mulser, F. Cornolti, and D. Bauer, Phys. Plasmas 5, 4466 (1998).

[c18] These approximate unequalities overestimate both the surface and the threshold field. The surface field, however, should be increased with respect to the steady state value during the transient phase because of absorption increase by ionization dephasing [12].

[c19] Mathematically, the boundary conditions of the WDM model are those of an initial-value problem, while the present case corresponds rather to a boundary-value problem.

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Steady magnetic field generation due to transient field ionization in ultrashort laser-solid interaction

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