OSA's Digital Library

Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 26 — Dec. 22, 2008
  • pp: 21922–21929

Two-photon resonant excitation of a doubly excited state in He atoms by high-harmonic pulses

Taro Sekikawa, Tatsuya Okamoto, Eisuke Haraguchi, Mikio Yamashita, and Takashi Nakajima  »View Author Affiliations

Optics Express, Vol. 16, Issue 26, pp. 21922-21929 (2008)

View Full Text Article

Enhanced HTML    Acrobat PDF (2020 KB)

Browse Journals / Lookup Meetings

Browse by Journal and Year


Lookup Conference Papers

Close Browse Journals / Lookup Meetings

Article Tools



We experimentally demonstrate a two-color two-photon resonant excitation of the doubly excited 2p21S state in helium atoms by the combination of 19th and 21st harmonic photons of a Ti:sapphire laser. Production of the 2p21S state is confirmed by the experimental observation that the electron emission from this state does not depend on the direction of harmonic polarization. Our ab-initio theoretical results through the solution of time-dependent Schrödinger equation are consistent with the experimental results and confirm the first successful production of a doubly excited state by high-harmonic pulses.

© 2008 Optical Society of America

OCIS Codes
(190.4160) Nonlinear optics : Multiharmonic generation
(190.4180) Nonlinear optics : Multiphoton processes

ToC Category:
Nonlinear Optics

Original Manuscript: November 11, 2008
Revised Manuscript: December 3, 2008
Manuscript Accepted: December 7, 2008
Published: December 17, 2008

Taro Sekikawa, Tatsuya Okamoto, Eisuke Haraguchi, Mikio Yamashita, and Takashi Nakajima, "Two-photon resonant excitation of a doubly excited state in He atoms by high-harmonic pulses," Opt. Express 16, 21922-21929 (2008)

Sort:  Author  |  Year  |  Journal  |  Reset  


  1. C. Spielmann, N. H. Burnett, S. Sartania, R. Koppitsch, M. Schnurer, C. Kan, M. Lenzner, P. Wobrauschek, and F. Krausz, "Generation of Coherent X-rays in the Water Window Using 5-Femtosecond Laser Pulses," Science 278, 661-664 (1997). [CrossRef]
  2. Z. Chang, A. Rundquist, H. Wang, M. M. Murnane, and H. C. Kapteyn, "Generation of Coherent Soft X rays at 2.7 nm Using High Harmonics," Phys. Rev. Lett. 79, 2967-2970 (1997). [CrossRef]
  3. J. Seres, E. Seres, A. J. Verhoef, G. Tempea, C. Streli, P. Wobrauschek, V. Yakovlev, A. Scrinzi, C. Spielmann, and F. Krausz, "Souce of coherent kiloelectronvolt x-rays," Nature 433, 596 (2005). [CrossRef] [PubMed]
  4. V. Ayvazyan, N. Baboi, J. Bähr, V. Balandin, B. Beutner, A. Brandt, I. Bohnet, A. Bolzmann, R. Brinkmann, O. I. Brovko, J. P. Carneiro, S. Casalbuoni, M. Castellano, P. Castro, L. Catani, E. Chiadroni, S. Choroba, A. Cianchi, H. Delsim-Hashemi, G. DiPirro, M. Dohlus, S. Düsterer, B. F. H. T. Edwards, A. A. Fateev, J. Feldhaus, K. Flöttmann, J. Frisch, L. Fröhlich, T. Garvey, U. Gensch, N. Golubeva, H. -J. Grabosch, B. Grigoryan, O. Grimm, U. Hahn, J. H. Han, M. V. Hartrott, K. Honkavaara, M. Hüning, R. Ischebeck, E. Jaeschke, M. Jablonka1, R. Kammering, V. Katalev, B. Keitel, S. Khodyachykh, Y. Kim, V. Kocharyan, M. Körfer, M. Kollewe, D. Kostin, D. Krämer, M. Krassilnikov, G. Kube, L. Lilje, T. Limberg, D. Lipka, F. Lähl, M. Luong, C. Magne, J. Menzel, P. Michelato, V. Miltchev, M. Minty, W. D. Möller, L. Monaco, W. Müller, M. Nagl, O. Napoly, P. Nicolosi, D. Nölle, T. Nuñez, A. Oppelt, C. Pagani, R. Paparella, B. Petersen, B. Petrosyan, J. Pflüger, P. Piot, E. Plönjes, L. Poletto, D. Proch, D. Pugachov, K. Rehlich, D. Richter, S. Riemann, M. Ross, J. Rossbach, M. Sachwitz, E. L. Saldin, W. Sandner, H. Schlarb, B. Schmidt, M. Schmitz, P. Schmüser, J. R. Schneider, E. A. Schneidmiller, H.-J. Schreiber, S. Schreiber, A. V. Shabunov, D. Sertore, S. Setzer, S. Simrock, E. Sombrowski, L. Staykov, B. Steffen, F. Stephan, F. Stulle, K. P. Sytchev, H. Thom, K. Tiedtke, M. Tischer, R. Treusch, D. Trines, I. Tsakov, A. Vardanyan, R. Wanzenberg, T. Weiland, H. Weise, M. Wendt, I. Will, A. Winter, K. Wittenburg, M. V. Yurkov, I. Zagorodnov, P. Zambolin, and K. Zapfe, "First Operation of a Free-electron Laser Generating GW power radiation at 32 nm wavelength," Eur. Phys. J. D 37, 297-303 (2006). [CrossRef]
  5. Y. Kobayashi, T. Sekikawa, Y. Nabekawa, and S. Watanabe, "27-fs extreme ultraviolet pulse generation by high-order harmonics," Opt. Lett. 23, 64-66 (1998). [CrossRef]
  6. P. Tzallas, D. Charalambidis, N. A. Papadogiannis, K. Witte, and G. D. Tsakiris, "Direct observation of attosecond light bunching," Nature(London) 426, 267-271 (2003). [CrossRef]
  7. N. Miyamoto, M. Kamei, D. Yoshitomi, T. Kanai, T. Sekikawa, T. Nakajima, and S. Watanabe, "Observation of two-photon above-threshold ionization of rare gases by xuv harmonic photons," Phys. Rev. Lett. 93, 083903 (2004). [CrossRef] [PubMed]
  8. T. Nakajima and S. Watanabe, "Two-photon above-threshold-ionization cross sections of rare-gas atoms by xuv photons," Phys. Rev. A 70, 043412 (2004). [CrossRef]
  9. T. Sekikawa, A. Kosuge, T. Kanai, and S. Watanabe, "Nonliear optics in the extreme ultraviolet," Nature(London) 432, 605-608 (2004). [CrossRef]
  10. Y. Nabekawa, H. Hasegawa, E. Takahashi, and K. Midorikawa, "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," Phys. Rev. Lett. 94, 043001 (2005). [CrossRef] [PubMed]
  11. A. Kosuge, T. Sekikawa, X. Zhou, T. Kanai, S. Adachi, and S. Watanabe, "Frequency-Resolved Optical Gating of Isolated Attosecond Pulses in the Extreme Ultraviolet," Phys. Rev. Lett. 97, 263901 (2006). [CrossRef]
  12. Y. Nabekawa, T. Shimizu, T. Okino, K. Furusawa, H. Hasegawa, K. Yamanouchi, and K. Midorikawa, "Interferometric Autocorrelation of an Attosecond Pulse Train in the Single-Cycle Regime," Phys. Rev. Lett. 97, 153904 (2006). [CrossRef] [PubMed]
  13. M. Nagasono, E. Suljoti, A. Pietzsch, F. Hennies, M. Wellhöfer, J.-T. Hoeft, M. Martins, W. Wurth, R. Treusch, J. Feldhaus, J. R. Schneider, and A. Föhlisch, "Resonant two-photon absorption of extreme-ultraviolet free-electron-laser radiation in helium," Phys. Rev. A 75, 051406(R) (2007). [CrossRef]
  14. J. L. Krause, K. J. Schafer, and K. C. Kulander, "Higher-Order Harmonic Generation from Atoms and Ions in the High Intensity Regime," Phys. Rev. Lett. 68, 3535-3538 (1992). [CrossRef] [PubMed]
  15. Z. Chang, A. Rundquist, H. Wang, I. Christov, H. C. Kapteyn, and M. M. Murnane, "Temporal phase control of soft-x-ray harmonic emission," Phys. Rev. A 58, R30-R33 (1998). [CrossRef]
  16. J. W. Cooper, U. Fano, and F. Prats, "Classification of Two-Electron Excitation Levels of Helium," Phys. Rev. Lett. 10, 518-521 (1963). [CrossRef]
  17. R. P. Madden and K. Codling, "New Autoionizing Atomic Energy Levels in He, Ne, and Ar," Phys. Rev. Lett. 10, 516-518 (1963). [CrossRef]
  18. C. D. Lin, "Classification and supermultiplet structure of doubly excited states," Phys. Rev. A 29, 1019-1033 (1984). [CrossRef]
  19. M. Domke, K. Schulz, G. Remmers, G. Kaindl, and D. Wintgen, "High-resolution study of 1P0 double-excitation states in helium," Phys. Rev. A 53, 1424-1438 (1996). [CrossRef] [PubMed]
  20. M. K. Odling-Smee, E. Sokell, P. Hammond, and M. A. MacDonald, "Radiative Decay of Doubly Excited States in Helium below the He+(N=2) Ionization Threshold," Phys. Rev. Lett. 84, 2598-2601 (2000). [CrossRef] [PubMed]
  21. F. Penent, P. Lablanquie, R. I. Hall, M. Žitnik, K. Bučar, S. Stranges, R. Richter, M. Alagia, P. Hammond, and J. G. Lambourne, "Observation of Triplet Doubly Excited States in Single Photon Excitaion from Ground State Helium," Phys. Rev. Lett. 86, 2758-2761 (2001). [CrossRef] [PubMed]
  22. X. M. Tong and C. D. Lin, "Double photoexcitation of He atoms by attosecond xuv pulses in the presence of intense few-cycle infrared lasers," Phys. Rev. A 71, 033406 (2005). [CrossRef]
  23. B. A. deHarak, J. G. Childers, and N. L. S. Martin, "Ejected electron spectrum of He below the N=2 threshold," Phys. Rev. A 74, 032714 (2006). [CrossRef]
  24. T. Morishita, S. Watanabe, and C. D. Lin, "Attosecond Light Pulses for Probing Two-Electron Dynamics of Helium in the Time Domain," Phys. Rev. Lett. 98, 083003 (2007). [CrossRef] [PubMed]
  25. P. Salieres, A. L'Huillier, and M. Lewenstein, "Coherence Control of High-Order Harmonics," Phys. Rev. Lett. 74, 3776-3779 (1995). [CrossRef] [PubMed]
  26. X. Tang, H. Rudolph, and P. Lambropoulos, "Nonperturbative time-dependent theory of helium in a strong laser field," Phys. Rev. A 44, R6994 (1991). [CrossRef] [PubMed]
  27. T. Nakajima and G. Buica, "Above-threshold ionization of Mg by linearly and circularly polarized laser fields: Origin of the subpeaks in the photoelectron energy spectra," Phys. Rev. A 74, 023411 (2006). [CrossRef]
  28. T. Nakajima, "Above-threshold ionization by chirped laser pulses," Phys. Rev. A 75, 053409 (2007). [CrossRef]

Cited By

Alert me when this paper is cited

OSA is able to provide readers links to articles that cite this paper by participating in CrossRef's Cited-By Linking service. CrossRef includes content from more than 3000 publishers and societies. In addition to listing OSA journal articles that cite this paper, citing articles from other participating publishers will also be listed.


Fig. 1. Fig. 2. Fig. 3.
Fig. 4.

« Previous Article  |  Next Article »

OSA is a member of CrossRef.

CrossCheck Deposited