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Lasing modes of a microdisk with a ring gain area and of an active microring

Optical and Quantum Electronics, ISSN: 1572-817X, Vol: 47, Issue: 12, Page: 3883-3891
2015
  • 29
    Citations
  • 0
    Usage
  • 7
    Captures
  • 0
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  • 0
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Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    29
    • Citation Indexes
      29
  • Captures
    7

Article Description

Microcavity lasers shaped as thin circular disks are famous for the ultra-low thresholds of their whispering-gallery modes. We considered a two-dimensional model of such a laser in free space with a ring-like active region and compared the characteristics of its modes with the modes of an active microring, i.e. a similar disk with a concentric hole. The comparison showed that a microring has considerable rarefaction effect in terms of emission thresholds, accompanied by the blue-shift of emission spectra. If the ring becomes narrower than a half-wavelength in material, then all lasing modes obtain catastrophically high thresholds.

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