Whispering gallery mode microlaser at liquid Helium temperature

F. Treussart, V. S. Ilchenko, J. F. Roch, P. Domokos, J. Hare, V. Lefèvre, J. M. Raimond, S. Haroche

Research output: Contribution to journalArticle

21 Citations (Scopus)


We report on the realization of neodymium-doped silica microsphere laser, of diameters in the range 50-100 μm. Following very low threshold observed at room temperature (absorbed pump power of 200 nW), we present the new cryogenic setup operating at 2K. Very high quality factor Q > 3 × 108 has been preserved in a 50 μm diameter microsphere immersed in superfluid Helium. Preliminary results on lasing at this temperature have also been obtained as a first step towards a 'thresholdless' regime.

Original languageEnglish
Pages (from-to)670-673
Number of pages4
JournalJournal of Luminescence
Publication statusPublished - Feb 1998



  • Cavity quantum electrodynamics
  • Microlaser
  • Monolithic microcavities

ASJC Scopus subject areas

  • Biophysics
  • Biochemistry
  • Chemistry(all)
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Treussart, F., Ilchenko, V. S., Roch, J. F., Domokos, P., Hare, J., Lefèvre, V., Raimond, J. M., & Haroche, S. (1998). Whispering gallery mode microlaser at liquid Helium temperature. Journal of Luminescence, 76-77, 670-673. https://doi.org/10.1016/S0022-2313(97)00175-0