title: Single-mode waveguide optical isolator based on direction-dependent cutoff frequency.
abstract: A single-mode-waveguide optical isolator based on propagation direction dependent cut-off frequency is proposed. The isolation bandwidth is the difference between the cut-off frequencies of the lowest forward and backward propagating modes. Perturbation theory is used for analyzing the correlation between the material distribution and the bandwidth. The mode profile determines an appropriate distribution of non-reciprocal materials.
authors.affiliation: Department of Electrical and Computer Engineering, Fitzpatrick Institute for Photonics, Duke University, Durham, NC 27708-0291, USA. lingling.tang@duke.edu
authors.forename: Lingling
authors.initials: L
authors.lastname: Tang
authors.forename: Samuel M
authors.initials: SM
authors.lastname: Drezdzon
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Yoshie
mesh_terms: D000465:Algorithms; D003198:Computer Simulation; D004867:Equipment Design; D008027:Light; D015233:Models, Statistical; D008962:Models, Theoretical; D055095:Optics and Photonics; D012542:Scattering, Radiation