Abstract
Circular microresonators (microdisks) are natural can- didates for the realization of low-threshold miniature laser sources since some of their modes have extremely high Q-factors (low thresholds). In those modes, which are called whispering gallery modes, light cir- culates around the circumference of the disk trapped by total internal reflection. Although the microdisk cavities can provide ultra-low threshold lasing, their applicability faces the problem of isotropic light emis- sion which is due to the rotational symmetry of the system. Contrary to usual procedure, where a geo- metric deformation of the microdisk boundary is used to break the symmetry and, as a result, to achieve the output directionality, we propose a scenario inducing rotational symmetry breaking by placing a small but finite size circular scatterer inside the microdisk itself. We calculate positions of the new resonant modes and show that some of them possess clear emission direc- tionality while preserving high Q-factors.
Original language | English |
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Title of host publication | Proceedings of the 3rd International Conference on Mathematical Modeling of Wave Phenomena (MMWP08) |
Publisher | Linneuuniversitetet |
Pages | 287-289 |
Number of pages | 3 |
Publication status | Published - 2008 |
Event | Mathematical modelling of wave phenomena - Växjö, Sweden Duration: 9 Jun 2008 → 13 Jun 2008 |
Conference
Conference | Mathematical modelling of wave phenomena |
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Country/Territory | Sweden |
City | Växjö |
Period | 9/06/08 → 13/06/08 |