Optical microdisk resonator with a small but finite size scatterer

Carl P Dettmann , Gregory V Morozov, Martin M A Sieber, Holger Waalkens

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

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 languageEnglish
Title of host publicationProceedings of the 3rd International Conference on Mathematical Modeling of Wave Phenomena (MMWP08)
PublisherLinneuuniversitetet
Pages287-289
Number of pages3
Publication statusPublished - 2008
EventMathematical modelling of wave phenomena - Växjö, Sweden
Duration: 9 Jun 200813 Jun 2008

Conference

ConferenceMathematical modelling of wave phenomena
Country/TerritorySweden
CityVäxjö
Period9/06/0813/06/08

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