Production of doubly charged helium ions by two-photon absorption of an intense sub-10-fs soft x-ray pulse at 42 eV photon energy

被引：225

作者：

Nabekawa, Y ^{[1
]}

Hasegawa, H ^{[1
]}

Takahashi, EJ ^{[1
]}

Midorikawa, K ^{[1
]}

机构：

[1] RIKEN, Midorikawa Laser Technol ZLab, Wako, Saitama 3510198, Japan

来源：

PHYSICAL REVIEW LETTERS | 2005年 / 94卷 / 04期

关键词：

D O I：

10.1103/PhysRevLett.94.043001

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We report on the observation of doubly charged helium ions produced by a nonlinear interaction between a helium atom and photons with a photon energy of 42 eV which are generated with the 27th harmonic of a femtosecond pulse from a Ti:sapphire laser. The number of ions is proportional to the square of the intensity of the 27th harmonic pulse, and thus two-photon double ionization should be dominantly induced as compared with other nonlinear processes accompanying sequential ionization via a singly charged ion. This phenomenon is utilized to measure the pulse duration of the 27th harmonic pulse by using an autocorrelation technique, for the first time to our knowledge, and as a result a duration of 8 fs is found.

引用

页数：4

共 34 条

[1] Generation of GW radiation pulses from a VUV free-electron laser operating in the femtosecond regime -: art. no. 104802 [J].

Ayvazyan, V ;

Baboi, N ;

Bohnet, I ;

Brinkmann, R ;

Castellano, M ;

Castro, P ;

Catani, L ;

Choroba, S ;

Cianchi, A ;

Dohlus, M ;

Edwards, HT ;

Faatz, B ;

Fateev, AA ;

Feldhaus, J ;

Flöttmann, K ;

Gamp, A ;

Garvey, T ;

Genz, H ;

Gerth, C ;

Gretchko, V ;

Grigoryan, B ;

Hahn, U ;

Hessler, C ;

Honkavaara, K ;

Hüning, M ;

Ischebeck, R ;

Jablonka, M ;

Kamps, T ;

Körfer, M ;

Krassilnikov, M ;

Krzywinski, J ;

Liepe, M ;

Liero, A ;

Limberg, T ;

Loos, H ;

Luong, M ;

Magne, C ;

Menzel, J ;

Michelato, P ;

Minty, M ;

Müller, UC ;

Nölle, D ;

Novokhatski, A ;

Pagani, C ;

Peters, F ;

Pflüger, J ;

Piot, P ;

Plucinski, L ;

Rehlich, K ;

Reyzl, I .

PHYSICAL REVIEW LETTERS, 2002, 88 (10) :4

[2] Cross-correlation measurement of femtosecond noncollinear high-order harmonics [J].

Bouhal, A ;

Evans, R ;

Grillon, G ;

Mysyrowicz, A ;

Breger, P ;

Agostini, P ;

Constantinescu, RC ;

Muller, HG ;

vonderLinde, D .

JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS, 1997, 14 (04) :950-956

[3] X-ray pulses approaching the attosecond frontier [J].

Drescher, M ;

Hentschel, M ;

Kienberger, R ;

Tempea, G ;

Spielmann, C ;

Reider, GA ;

Corkum, PB ;

Krausz, F .

SCIENCE, 2001, 291 (5510) :1923-1927

[4] OBSERVATION OF NONSEQUENTIAL DOUBLE IONIZATION OF HELIUM WITH OPTICAL TUNNELING [J].

FITTINGHOFF, DN ;

BOLTON, PR ;

CHANG, B ;

KULANDER, KC .

PHYSICAL REVIEW LETTERS, 1992, 69 (18) :2642-2645

[5] Observation of laser assisted photoelectric effect and femtosecond high order harmonic radiation [J].

Glover, TE ;

Schoenlein, RW ;

Chin, AH ;

Shank, CV .

PHYSICAL REVIEW LETTERS, 1996, 76 (14) :2468-2471

[6] Double photoionization of helium down to 100 meV above threshold [J].

Huetz, A ;

Mazeau, J .

PHYSICAL REVIEW LETTERS, 2000, 85 (03) :530-533

[7] Two-photon ionization of He+ as a nonlinear optical effect in the soft-x-ray region -: art. no. 043405 [J].

Ishikawa, K ;

Midorikawa, K .

PHYSICAL REVIEW A, 2002, 65 (04) :7

[8] Mechanisms of photo double ionization of helium by 530 eV photons -: art. no. 033004 [J].

Knapp, A ;

Kheifets, A ;

Bray, I ;

Weber, T ;

Landers, AL ;

Schössler, S ;

Jahnke, T ;

Nickles, J ;

Kammer, S ;

Jagutzki, O ;

Schmidt, LPH ;

Osipov, T ;

Rösch, J ;

Prior, MH ;

Schmidt-Böcking, H ;

Cocke, CL ;

Dörner, R .

PHYSICAL REVIEW LETTERS, 2002, 89 (03) :330041-330044

[9] 27-fs extreme ultraviolet pulse generation by high-order harmonics [J].

Kobayashi, Y ;

Sekikawa, T ;

Nabekawa, Y ;

Watanabe, S .

OPTICS LETTERS, 1998, 23 (01) :64-66

[10] WAVELENGTH DEPENDENCE OF NONSEQUENTIAL DOUBLE-IONIZATION IN HE [J].

KONDO, K ;

SAGISAKA, A ;

TAMIDA, T ;

NABEKAWA, Y ;

WATANABE, S .

PHYSICAL REVIEW A, 1993, 48 (04) :R2531-R2533

← 1 2 3 4 →