2007/05/22 by C. P. Dettmann, Carl P. Dettmann, G. V. Morozov +4 · 25 citations
Engineering · Mathematics · Physics and Astronomy · #Advanced Fiber Laser Technologies #Computer science #Dielectric #Extension (predicate logic) #Function (biology) #Geometry #Mathematics #Optics #Optoelectronics #Photonic Crystals and Applications #Photonic and Optical Devices #Physics #Point (geometry) #Position (finance) #Quantum mechanics #Realisation #Resonator #Whispering gallery #Whispering-gallery wave #physics.optics
paper · pdf · doi:10.1209/0295-5075/82/34002
published in Europhysics Letters (EPL) 82(3), 34002 (Institute of Physics) · 4 pages, 7 figures, pdflatex
arxiv created 2007/05/22 · openalex publication_date 2008/04/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
We present a new design of dielectric microcavities supporting modes with large quality factors and highly directional light emission. The key idea is to place a point scatterer inside a dielectric circular microdisk. We show that, depending on the position and strength of the scatterer, this leads to strongly directional modes in various frequency regions while preserving the high Q -factors reminiscent of the whispering gallery modes of the microdisk without scatterer. The design is very appealing due to its simplicity, promising a cleaner experimental realisation than previously studied microcavity designs on the one hand and analytic tractability based on Green's function techniques and self-adjoint extension theory on the other.