Gain narrowing in few-atom systems

T. Savels, Tom Savels, Allard Mosk, Aart Lagendijk

Research output: Contribution to journalArticleAcademicpeer-review

13 Citations (Scopus)
131 Downloads (Pure)


Using a density matrix approach, we study the simplest systems that display both gain and feedback: clusters of 2 to 5 atoms, one of which is pumped. The other atoms supply feedback through multiple scattering of light. We show that, if the atoms are in each other's near field, the system exhibits large gain narrowing and spectral mode redistribution. The observed phenomena are more pronounced if the feedback is enhanced. Our system is to our knowledge the simplest exactly solvable microscopic system which shows the approach to laser oscillation.
Original languageUndefined
Article number103601
Pages (from-to)1-4
Number of pages4
JournalPhysical review letters
Issue number10
Publication statusPublished - 2007


  • METIS-239789
  • IR-59112

Cite this