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Electromagnetically induced transparency with resonant nuclei in a cavity



The manipulation of light–matter interactions by quantum control of atomic levels has had a profound impact on optical sciences. Such manipulation has many applications, including nonlinear optics at the few-photon level1,2,3, slow light4,5, lasing without inversion6,7,8 and optical quantum information processing9,10. The critical underlying technique is electromagnetically induced transparency, in which quantum interference between transitions in multilevel atoms11,12,13,14,15 renders an opaque medium transparent near an atomic resonance. With the advent of high-brilliance, accelerator-driven light sources such as storage rings or X-ray lasers, it has become attractive to extend the techniques of optical quantum control to the X-ray regime16,17. Here we demonstrate electromagnetically induced transparency in the regime of hard X-rays, using the 14.4-kiloelectronvolt nuclear resonance of the Mössbauer isotope iron-57 (a two-level system). We exploit cooperative emission from ensembles of the nuclei, which are embedded in a low-finesse cavity and excited by synchrotron radiation. The spatial modulation of the photonic density of states in a cavity mode leads to the coexistence of superradiant and subradiant states of nuclei, respectively located at an antinode and a node of the cavity field. This scheme causes the nuclei to behave as effective three-level systems, with two degenerate levels in the excited state (one of which can be considered metastable). The radiative coupling of the nuclear ensembles by the cavity field establishes the atomic coherence necessary for the cancellation of resonant absorption. Because this technique does not require atomic systems with a metastable level, electromagnetically induced transparency and its applications can be transferred to the regime of nuclear resonances, establishing the field of nuclear quantum optics.

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Figure 1: Calculated reflectivity spectra of different cavity configurations.
Figure 2: Effective EIT level scheme of the nuclei in the cavity.
Figure 3: Origin of the coherent control field in the cavity.
Figure 4: Observation of nuclear resonant EIT.


  1. Harris, S. E., Field, J. E. & Imamoğlu, A. Nonlinear optical processes using electromagnetically induced transparency. Phys. Rev. Lett. 64, 1107–1110 (1990)

    ADS  CAS  Article  Google Scholar 

  2. Schmidt, H. & Imamoğlu, A. Giant Kerr nonlinearity obtained by electromagnetically induced transparency. Opt. Lett. 21, 1936–1938 (1996)

    ADS  CAS  Article  Google Scholar 

  3. Harris, S. E. & Hau, L. V. Nonlinear optics at low light levels. Phys. Rev. Lett. 82, 4611–4614 (1999)

    ADS  CAS  Article  Google Scholar 

  4. Hau, L. V., Harris, S. E., Dutton, Z. & Behroozi, C. H. Light speed reduction to 17 metres per second in an ultracold atomic gas. Nature 397, 594–598 (1999)

    ADS  CAS  Article  Google Scholar 

  5. Kash, M. M. et al. Ultraslow group velocity and enhanced nonlinear optical effects in a coherently driven hot atomic gas. Phys. Rev. Lett. 82, 5229–5232 (1999)

    ADS  CAS  Article  Google Scholar 

  6. Zibrov, A. S. et al. Experimental demonstration of laser oscillation without population inversion via quantum interference in Rb. Phys. Rev. Lett. 75, 1499–1502 (1995)

    ADS  CAS  Article  Google Scholar 

  7. Padmabandu, G. G. et al. Laser oscillation without population inversion in a sodium atomic beam. Phys. Rev. Lett. 76, 2053–2056 (1996)

    ADS  CAS  Article  Google Scholar 

  8. Scully, M. O. & Fleischhauer, M. Lasers without inversion. Science 263, 337–338 (1994)

    ADS  CAS  Article  Google Scholar 

  9. Liu, C., Dutton, Z., Behrozzi, C. H. & Hau, L. V. Observation of coherent optical information storage in an atomic medium using halted light pulses. Nature 409, 490–493 (2001)

    ADS  CAS  Article  Google Scholar 

  10. Lukin, M. D. Trapping and manipulating photon states in atomic ensembles. Rev. Mod. Phys. 75, 457–472 (2003)

    ADS  CAS  Article  Google Scholar 

  11. Hänsch, T., Keil, R., Schabert, A., Schmelzer & Toschek, P. Interaction of laser light waves by dynamic stark splitting. Z. Phys. 226, 293–296 (1969)

    ADS  Article  Google Scholar 

  12. Kocharovskaya, O. A. & Khanin, Ya. I. Coherent amplification of an ultrashort pulse in a three-level medium without a population inversion. JETP Lett. 48, 630–634 (1988)

    ADS  Google Scholar 

  13. Boller, K. J., Imamoğlu, A. & Harris, S. E. Observation of electromagnetically induced transparency. Phys. Rev. Lett. 66, 2593–2596 (1991)

    ADS  CAS  Article  Google Scholar 

  14. Lukin, M. D. & Imamoğlu, A. Controlling photons using electromagnetically induced transparency. Nature 413, 273–276 (2001)

    ADS  CAS  Article  Google Scholar 

  15. Fleischhauer, M., Imamoğlu, A. & Marangos, J. P. Electromagnetically induced transparency: optics in coherent media. Rev. Mod. Phys. 77, 633–673 (2005)

    ADS  CAS  Article  Google Scholar 

  16. Buth, C., Santra, R. & Young, L. Electromagnetically induced transparency for X-rays. Phys. Rev. Lett. 98, 253001 (2007)

    ADS  Article  Google Scholar 

  17. Glover, T. E. et al. Controlling X-rays with light. Nature Phys. 6, 69–74 (2010)

    ADS  CAS  Article  Google Scholar 

  18. Fano, U. Effects of configuration interaction on intensities and phase shifts. Phys. Rev. 124, 1866–1878 (1961)

    ADS  CAS  Article  Google Scholar 

  19. Röhlsberger, R., Schlage, K., Sahoo, B., Couet, S. & Rüffer, R. Collective Lamb shift in single- photon superradiance. Science 328, 1248–1251 (2010)

    ADS  Article  Google Scholar 

  20. Röhlsberger, R. The collective Lamb shift in nuclear γ-ray superradiance. J. Mod. Opt. 57, 1979–1992 (2010)

  21. Röhlsberger, R., Klein, T., Schlage, K., Leupold, O. & Rüffer, R. Coherent X-ray scattering from ultrathin probe layers. Phys. Rev. B 69, 235412 (2004)

    ADS  Article  Google Scholar 

  22. Tanji-Suzuki, H., Chen, W., Landig, R., Simon, J. & Vuletic, V. Vacuum-induced transparency. Science 333, 1266–1269 (2011)

    ADS  CAS  Article  Google Scholar 

  23. Coussement, R. et al. Controlling absorption of gamma radiation via nuclear level anticrossing. Phys. Rev. Lett. 89, 107601 (2002)

    ADS  CAS  Article  Google Scholar 

  24. Gheysen, S. & Odeurs, J. Quantum mechanical study of resonant scattering in a nuclear Λ scheme. Phys. Rev. B 74, 155443 (2006)

    ADS  Article  Google Scholar 

  25. Gheysen, S. & Odeurs, J. Nuclear level mixing-induced interference in FeCO3 . J. Phys. Condens. Matter 20, 485214 (2008)

    Article  Google Scholar 

  26. Autler, S. H. & Townes, C. H. Stark effect in rapidly varying fields. Phys. Rev. 100, 703–722 (1955)

    ADS  Article  Google Scholar 

  27. Anisimov, P. M., Dowling, J. P. & Sanders, B. Objectively discerning Autler-Townes splitting from electromagnetically induced transparency. Phys. Rev. Lett. 107, 163604 (2011)

    ADS  Article  Google Scholar 

  28. Röhlsberger, R. Nuclear Condensed Matter Physics with Synchrotron Radiation (Springer Tracts Mod. Phys. 208, Springer, 2004)

    Google Scholar 

  29. Callens, R. et al. Principles of stroboscopic detection of nuclear forwardscattered synchrotron radiation. Phys. Rev. B 67, 104423 (2003)

    ADS  Article  Google Scholar 

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We are grateful to R. Rüffer for the loan of the stainless steel analyser foil and to E. Burkel for the loan of the Mössbauer drive. Moreover, we acknowledge F.-U. Dill and A. Scholl for help with the experimental set-up, A. Rothkirch for help during the data processing and U. von Hörsten for performing the conversion electron Mössbauer measurements of the samples. We are indebted to W. Pfützner for assistance during sample preparation. Finally, we acknowledge discussions with J. Evers.

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Authors and Affiliations



R.R. designed the experiment, developed the theoretical description, coordinated the experimental efforts and wrote the paper. H.-C.W. and K.S. set up the beamline instrumentation and data acquisition systems and operated the beamline. B.S. prepared and characterized the samples. All authors participated in performing the experiment, discussing the experimental results and editing the manuscript.

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Correspondence to Ralf Röhlsberger.

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The authors declare no competing financial interests.

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This file contains a Supplementary Discussion and Equations, Supplementary Figures 1-6 with legends and additional references. (PDF 466 kb)

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Röhlsberger, R., Wille, HC., Schlage, K. et al. Electromagnetically induced transparency with resonant nuclei in a cavity. Nature 482, 199–203 (2012).

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