Dynanmic nonlinear effect on lasing in random media

H. Cao*, A. Yamilov, B. Liu, J. Y. Xu, Y. Ling, E. Seelig, R. P.H. Chang

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review


We review our recent work on lasing in active random media. Light scattering, which had been regarded detrimental to lasing action for a long time, actually provided coherent feedback for lasing. We also trapped laser light in micrometer-sized random media. The trapping was caused by disorder-induced scattering and interference. This nontraditional way of light confinement has important application to microlasers. The threshold of ranodm laser can be reduced by incorporating some degree of order into an active random medium. Our calculation result shows that by optimizing the degree of order one can dramatically reduce the threshold of random laser to the values comparable to those of photonic bandgap defect lasers.

Original languageEnglish (US)
Article number30
Pages (from-to)216-225
Number of pages10
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Dec 1 2004
EventComplex Mediums V: Light and Complexity - Denver, CO, United States
Duration: Aug 4 2004Aug 5 2004


  • Disordered system
  • Optical scattering
  • Random laser

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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