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By use of three-dimensional particle dynamics simulations, the explosion dynamics of methane clusters driven by an ultrashort intense laser pulse has been analyzed. Especially the influences of some classical inner ionization mechanisms on the charged state and kinetic energy of the ions produced in the laser-cluster interaction process have been discussed in detail. It is presented that when the laser intensity is low, the atoms are ionized by the laser field mainly through the tunnel ionization while the barrier suppression ionization dominates for the inner ionization as the laser intensity increases. Under the irradiation of the same laser pulse with high intensity, the cluster can attain highly-ionized charged states by the barrier suppression ionization rather than by the tunnel ionization. After the cluster is ionized, the ignition ionization effect from the inner Coulomb field of the cluster and the electron impact ionization effect from the free electrons resided inside the cluster will facilitate the process that the cluster can be ionized further.
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Keywords:
- ultrashort intense laser pulse /
- methane cluster /
- inner ionization
[1] Ditmire T, Smith R A, Tisch J W G, Hutchinson M H R 1997 Phys. Rev. Lett. 78 3121
[2] Taguchi T, Antonsen T M, Milchberg H M 2004 Phys. Rev. Lett. 92 205003
[3] Ditmire T, Donnelly T, Falcone R W, Perry M D 1995 Phys. Rev. Lett. 75 3122
[4] Deiss C, Rohringer N, Burgdrfer J, Lamour E, Prigent C, Rozet J P, Vernhet D 2006 Phys. Rev. Lett. 96 013203
[5] Ditmire T, Zweiback J, Yanovsky V P, Cowan T E, Hays G, Wharton K B 1999 Nature 398 489
[6] Zweiback J, Cowan T E, Hartley J H, Howell R, Wharton K B, Crane J K, Yanovsky V P, Hays G, Smith R A, Ditmire T 2002 Phys. Plasmas 9 3108
[7] Madison K W, Patel P K, Price D, Edens A, Allen M, Cowan T E, Zweiback J 2004 Phys. Plasmas 11 270
[8] Last I, Jortner J 2002 J. Phys. Chem. A 106 10877
[9] Lu H Y, Wang C, Chen G L, Kim C J, Liu J S, Ni G Q, Li R X, Xu Z Z 2009 Chin. Phys. B 18 537
[10] Jortner J, Last I 2002 Chem. Phys. Chem. 3 845
[11] Last I, Jortner J 2004 J. Chem. Phys. 120 1336
[12] An W K, Qiu X J, Zhu Z Y 2004 Acta Phys. Sin. 53 2250 (in Chinese)[安伟科、邱锡钧、朱志远 2004 物理学报 53 2250]
[13] Taguchi T, Antonsen T M, Milchberg H M 2004 Phys. Rev. Lett. 92 205003
[14] Sakabe S, Shimizu S, Hashida M, Sato F, Tsuyukushi T, Nishihara K, Okihara S, Kagawa T, Izawa Y, Imasaki K, Iida T 2004 Phys. Rev. A 69 023203
[15] Peano F, Fonseca R A, Silva L O 2005 Phys. Rev. Lett. 94 033401
[16] Du H C, Zhu P J, Sun S H, Liu Z Y, Li L, Ma L L, Hu B T 2009 Chin. Phys. B 18 2426
[17] Ditmire T, Donnelly T, Rubenchik A M, Falcone R W, Perry M D 1996 Phys. Rev. A 53 3379
[18] Parra E, Alexeev I, Fan J, Kim K Y, McNaught S J, Milchberg H M 2003 J. Opt. Soc. Am. B 20 118
[19] Rose-Petruck C, Schafer K J, Wilson K R, Barty C P J 1997 Phys. Rev. A 55 1182
[20] Eberly J H, Su Q, Javanainen J 1989 Phys. Rev. Lett. 62 881
[21] Farges J, de Feraudy M F, Raoult B, Torchet G 1986 J. Chem. Phys. 84 3491
[22] Hohenberger M, Symes D R, Madison K W, Sumeruk A, Dyer G, Edens A, Grigsby W, Hays G, Teichmann M, Ditmire T 2005 Phys. Rev. Lett. 95 195003
[23] Li H Y, Liu J S, Wang C, Ni G Q, Li R X, Xu Z Z 2008 Chin. Phys. B 17 1237
[24] Ammosov M V, Delone N B, Krainov V P 1986 Sov. Phys. JETP 64 1191
[25] Augst S, Meyerhofer D D, Strickland D, Chint S L 1991 J. Opt. Soc. Am. B 8 858
[26] Last I, Jortner J 2006 Phys. Rev. Lett. 97 173401
[27] Ditmire T 1998 Phys. Rev. A 57 R4094
[28] Last I, Jortner J 2000 Phys. Rev. A 62 013201
[29] Ishikawa K, Blenski T 2000 Phys. Rev. A 62 063204
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[1] Ditmire T, Smith R A, Tisch J W G, Hutchinson M H R 1997 Phys. Rev. Lett. 78 3121
[2] Taguchi T, Antonsen T M, Milchberg H M 2004 Phys. Rev. Lett. 92 205003
[3] Ditmire T, Donnelly T, Falcone R W, Perry M D 1995 Phys. Rev. Lett. 75 3122
[4] Deiss C, Rohringer N, Burgdrfer J, Lamour E, Prigent C, Rozet J P, Vernhet D 2006 Phys. Rev. Lett. 96 013203
[5] Ditmire T, Zweiback J, Yanovsky V P, Cowan T E, Hays G, Wharton K B 1999 Nature 398 489
[6] Zweiback J, Cowan T E, Hartley J H, Howell R, Wharton K B, Crane J K, Yanovsky V P, Hays G, Smith R A, Ditmire T 2002 Phys. Plasmas 9 3108
[7] Madison K W, Patel P K, Price D, Edens A, Allen M, Cowan T E, Zweiback J 2004 Phys. Plasmas 11 270
[8] Last I, Jortner J 2002 J. Phys. Chem. A 106 10877
[9] Lu H Y, Wang C, Chen G L, Kim C J, Liu J S, Ni G Q, Li R X, Xu Z Z 2009 Chin. Phys. B 18 537
[10] Jortner J, Last I 2002 Chem. Phys. Chem. 3 845
[11] Last I, Jortner J 2004 J. Chem. Phys. 120 1336
[12] An W K, Qiu X J, Zhu Z Y 2004 Acta Phys. Sin. 53 2250 (in Chinese)[安伟科、邱锡钧、朱志远 2004 物理学报 53 2250]
[13] Taguchi T, Antonsen T M, Milchberg H M 2004 Phys. Rev. Lett. 92 205003
[14] Sakabe S, Shimizu S, Hashida M, Sato F, Tsuyukushi T, Nishihara K, Okihara S, Kagawa T, Izawa Y, Imasaki K, Iida T 2004 Phys. Rev. A 69 023203
[15] Peano F, Fonseca R A, Silva L O 2005 Phys. Rev. Lett. 94 033401
[16] Du H C, Zhu P J, Sun S H, Liu Z Y, Li L, Ma L L, Hu B T 2009 Chin. Phys. B 18 2426
[17] Ditmire T, Donnelly T, Rubenchik A M, Falcone R W, Perry M D 1996 Phys. Rev. A 53 3379
[18] Parra E, Alexeev I, Fan J, Kim K Y, McNaught S J, Milchberg H M 2003 J. Opt. Soc. Am. B 20 118
[19] Rose-Petruck C, Schafer K J, Wilson K R, Barty C P J 1997 Phys. Rev. A 55 1182
[20] Eberly J H, Su Q, Javanainen J 1989 Phys. Rev. Lett. 62 881
[21] Farges J, de Feraudy M F, Raoult B, Torchet G 1986 J. Chem. Phys. 84 3491
[22] Hohenberger M, Symes D R, Madison K W, Sumeruk A, Dyer G, Edens A, Grigsby W, Hays G, Teichmann M, Ditmire T 2005 Phys. Rev. Lett. 95 195003
[23] Li H Y, Liu J S, Wang C, Ni G Q, Li R X, Xu Z Z 2008 Chin. Phys. B 17 1237
[24] Ammosov M V, Delone N B, Krainov V P 1986 Sov. Phys. JETP 64 1191
[25] Augst S, Meyerhofer D D, Strickland D, Chint S L 1991 J. Opt. Soc. Am. B 8 858
[26] Last I, Jortner J 2006 Phys. Rev. Lett. 97 173401
[27] Ditmire T 1998 Phys. Rev. A 57 R4094
[28] Last I, Jortner J 2000 Phys. Rev. A 62 013201
[29] Ishikawa K, Blenski T 2000 Phys. Rev. A 62 063204
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