First observation of ultraslow group velocity of light in a solid

A. V. Turukhin, V. S. Sudarshanam, J. A. Musser, M. S. Shahriar, P. R. Hemmer

Research output: Contribution to journalArticlepeer-review

1 Scopus citations


We report ultraslow group velocities of light in a solid. Light speeds as slow as 45 m/s were observed, corresponding to a group delay of 66 μs in a 3-mm thick, optically dense crystal of Pr doped Y2SiO5. Reduction of the group velocity is accomplished by using a sharp spectral feature in absorption and dispersion that is produced by resonance Raman excitation of a ground-state spin coherence. Potential applications of slow and stopped light for the highly efficient storage and recall of optical data are discussed.

Original languageEnglish (US)
Pages (from-to)352-357
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - 2001


  • Group velocity of light
  • Raman scattering
  • Rare-earth doped materials
  • Spin coherences

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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