2013/05/25 by Li Ge, Qinghai Song, Brandon Redding +4
Engineering · Mathematics · Physics and Astronomy · #Boundary (topology) #Boundary value problem #Computational physics #Coupling (piping) #Materials science #Mathematical analysis #Mathematics #Multi-mode optical fiber #Nonlinear Photonic Systems #Optical fiber #Optics #Perturbation (astronomy) #Perturbation theory (quantum mechanics) #Photonic Crystals and Applications #Photonic and Optical Devices #Physics #Quantum electrodynamics #Quantum mechanics #Scattering #physics.optics #quant-ph
paper · pdf · doi:10.1103/physreva.88.043801
published as Phys. Rev. A 88, 043801 (2013) · 9 pages, 10 figures
arxiv created 2013/05/25 · openalex publication_date 2013/10/02 · arxiv updated 2015/06/16 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that coupling among multiple resonances can be conveniently introduced and controlled by boundary wave scattering. This is demonstrated in optical microcavities of quasicircular shapes, where the couplings of multiple modes are determined by the scattering from harmonic boundary deformations. We analyze these couplings using a perturbation theory, which gives an intuitive understanding of the lowest-order and higher-order scattering processes. Different scattering paths between two boundary waves can either enhance or reduce their coupling strength. The effect of controlled multimode coupling is most pronounced in the direction of output from an open cavity, as the coupling can cause a dramatic change of the external cavity field distribution.