Microdisk resonators with two point scatterers

C.P. Dettmann, G.V. Morozov, M. Sieber, H. Waalkens*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


Optical microdisk resonators exhibit modes with extremely high Q-factors. Their low lasing thresholds make circular microresonators good candidates for the realization of miniature laser sources. They have, however, the serious drawback that their light emission is isotropic, which is inconvenient for many applications. In our previous work, we showed that the presence of a point scatterer inside the disk can lead to highly directional modes in various frequency ranges while preserving the high Q-factors. In the present paper we generalize this idea to two point scatterers. The motivation for this work is that the strength of a point scatterer is difficult to control in experiments, and the presence of a second scatterer leads to a higher dimensional parameter space which permits to compensate this deficiency. Similar to the case of a single scatterer in a circular disk, the problem of finding the resonance modes in the presence of two scatterers is to a large extent analytically tractable.
Original languageEnglish
Title of host publication13th International Conference on Transparent Optical Networks (ICTON), 2011
Number of pages3
ISBN (Electronic)9781457708824
ISBN (Print)9781457708817
Publication statusPublished - 1 Aug 2011


  • Microdisk resonators
  • Two point scatterers
  • Directivity
  • Q-factor


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