title: Abrupt coupling between strongly dissimilar waveguides with 100% transmission.
abstract: We present numerical experiments showing how coupled-mode theory can be systematically applied to join very dissimilar photonic crystal waveguides with 100% transmission. Our approach relies on appropriately tuning the coupling of the evanescent tail of a cavity mode to each waveguide. The transition region between the waveguides may be as short as a few lattice spacings. Moreover, this technique only requires varying a small number of parameters (two for each waveguide in our example) and the tuning to each waveguide may be done separately, greatly simplifying the computations involved.
authors: Department of Physics, Massachusetts Institute of Technology, Massachusetts 02139, USA. akurs@alum.mit.edu
authors: André
authors: A
authors: Kurs
authors: John D
authors: JD
authors: Joannopoulos
authors: Marin
authors: M
authors: Soljačić
authors: Steven G
authors: SG
authors: Johnson
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D008027:Light; D008962:Models, Theoretical; D012031:Refractometry / Q000379:methods*; D012542:Scattering, Radiation; D020349:Surface Plasmon Resonance / Q000295:instrumentation*