Skip to main content

Superfluorescence/Superradiance in Helium Following Free-Electron Laser Excitation

  • Conference paper
  • First Online:
X-Ray Lasers 2016 (ICXRL 2016)

Part of the book series: Springer Proceedings in Physics ((volume 202))

Included in the following conference series:

  • 1154 Accesses


We discuss the observation of superfluorescence following the excitation of helium atoms with pulses from a free-electron laser. From semi-classical simulations and consideration of transition parameters, we predict that it should be possible to generate pulses of EUV superfluorescence using two-photon excitation.

This is a preview of subscription content, log in via an institution to check access.

Access this chapter

Subscribe and save

Springer+ Basic
EUR 32.99 /Month
  • Get 10 units per month
  • Download Article/Chapter or eBook
  • 1 Unit = 1 Article or 1 Chapter
  • Cancel anytime
Subscribe now

Buy Now

USD 29.95
Price excludes VAT (USA)
  • Available as PDF
  • Read on any device
  • Instant download
  • Own it forever
USD 169.00
Price excludes VAT (USA)
  • Available as EPUB and PDF
  • Read on any device
  • Instant download
  • Own it forever
Softcover Book
USD 219.99
Price excludes VAT (USA)
  • Compact, lightweight edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info
Hardcover Book
USD 219.99
Price excludes VAT (USA)
  • Durable hardcover edition
  • Dispatched in 3 to 5 business days
  • Free shipping worldwide - see info

Tax calculation will be finalised at checkout

Purchases are for personal use only

Institutional subscriptions

Similar content being viewed by others


  1. Dicke, R.H.: Coherence in spontaneous radiation processes. Phys. Rev. 93(1), 99–110 (1954)

    Google Scholar 

  2. Gross, M., Haroche, S.: Superradiance: an essay on the theory of collective spontaneous emission. Phys. Rep. 93(5), 301–396 (1982)

    Google Scholar 

  3. Benedict, M.G. (eds.): Super-Radiance: Multiatomic Coherent Emission. CRC Press, Bristol; Philadelphia (1996)

    Google Scholar 

  4. Allen, L., Eberly, J.H.: Optical Resonance and Two-Level Atoms. Dover, New York (1987)

    Google Scholar 

  5. Cong, K., Zhang, Q., Wang, Y., et al.: Dicke superradiance in solids. J. Opt. Soc. Am. B 33(7), C80 (2016). arXiv: 1602.04374

  6. Röhlsberger, R., Schlage, K., Sahoo, B., et al.: Collective lamb shift in single-photon superradiance. Science 328(5983), 1248–1251 (2010)

    Google Scholar 

  7. Nagasono, M., Harries, J.R., Iwayama, H., et al.: Observation of free-electron-laser-induced collective spontaneous emission (superfluorescence). Phys. Rev. Lett. 107(19), 193603 (2011)

    Google Scholar 

  8. Nakajima, K., Harries, J.R., Iwayama, H., et al.: Simultaneous measurements of super-radiance at multiple wavelengths from helium excited states: I. Experiment. J. Phys. Soc. Jpn. 84(5), 054301 (2015)

    Google Scholar 

  9. Harries, J.R., Iwayama, H., Nagasono, M., et al.: A streak camera study of superfluorescence at multiple wavelengths from helium atoms excited using free electron laser pulses. J. Phys. B: At. Mol. Opt. Phys. 48(10), 105002 (2015)

    Article  ADS  Google Scholar 

  10. Ohae, C., Harries, J.R., Iwayama, H., et al.: Simultaneous measurements of superradiance at multiple wavelength from helium excited states: II. Analysis. J. Phys. Soc. Jpn. 85(3), 034301 (2016)

    Google Scholar 

  11. Brownell, J.H., Lu, X., Hartmann, S.R.: Yoked superfluorescence. Phys. Rev. Lett. 75(18), 3265–3268 (1995)

    Google Scholar 

  12. Yi, Z., Jha, P.K., Yuan, L., et al.: Observing the transition from yoked superfluorescence to superradiance. Opt. Commun. 351, 45–49 (2015)

    Article  ADS  Google Scholar 

  13. Okada, J., Ikeda, K., Matsuoka, M.: Cooperative cascade emission. Opt. Commun. 26(2), 189–192 (1978)

    Article  ADS  MATH  Google Scholar 

  14. Lvovsky, A.I., Hartmann, S.R., Moshary, F.: Superfluorescence-stimulated photon echoes. Phys. Rev. Lett. 89(26), 263602 (2002)

    Google Scholar 

  15. Pfeifer, T., Jiang, Y., Düsterer, S., et al.: Partial-coherence method to model experimental free-electron laser pulse statistics. Opt. Lett. 35(20), 3441–3443 (2010)

    Article  ADS  Google Scholar 

  16. Harries, J.R., Ohae, C., Kuma, S., et al.: Single-atom response of helium atoms to pulses from an EUV free-electron laser: implications for the subsequent development of superfluorescence. Phys. Rev. A 94(6), 063416 (2016)

    Google Scholar 

  17. Marskar, R., Österberg, U.: Multilevel Maxwell-Bloch simulations in inhomogeneously broadened media. Opt. Express 19(18), 16784–16796 (2011)

    Article  ADS  Google Scholar 

Download references


This work was supported in part by the Research Foundation for Opto-Science and Technology, and a JSPS KAKENHI grant (number 15K04707). We are grateful to M. Nagasono, C. Ohae, Y. Miyamoto, K. Nakajima, T. Togashi and N. Sasao for helpful discussions.

Author information

Authors and Affiliations


Corresponding author

Correspondence to J. R. Harries .

Editor information

Editors and Affiliations

Rights and permissions

Reprints and permissions

Copyright information

© 2018 Springer International Publishing AG

About this paper

Check for updates. Verify currency and authenticity via CrossMark

Cite this paper

Harries, J.R., Kuma, S., Iwayama, H., Shigemasa, E. (2018). Superfluorescence/Superradiance in Helium Following Free-Electron Laser Excitation. In: Kawachi, T., Bulanov, S., Daido, H., Kato, Y. (eds) X-Ray Lasers 2016. ICXRL 2016. Springer Proceedings in Physics, vol 202. Springer, Cham.

Download citation

Publish with us

Policies and ethics