Interaction Between Two One-Way Waveguides
2012 (English)In: IEEE Journal of Quantum Electronics, ISSN 0018-9197, E-ISSN 1558-1713, Vol. 48, no 8, 1059-1064 p.Article in journal (Refereed) Published
The interaction between two (parallel) one-way waveguidesformed by photonic crystals is investigated theoretically. It is shown that when thetwo waveguides support modes propagating in opposite directions, they can effectively interact with each other only within a narrow guiding region where their propagation constants are nearly zero. In this coupling window, the waveguides are contra-directionally coupled and the efficiency grows monotonously with the coupling length, reaching 100% as the coupling length is large enough. When the one-waywaveguides support the modes propagating in the same direction, they may be efficiently coupled through the whole guiding regime, and their coupling exhibits the same behavior as the conventional uniform waveguides. The coupling between theone-way waveguides is first analyzed with the coupled-mode approximation and then verified by rigorous numerical simulation.
Place, publisher, year, edition, pages
IEEE , 2012. Vol. 48, no 8, 1059-1064 p.
coupling, nonreciprocity, one-way waveguides, photonic crystals
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-190012DOI: 10.1109/JQE.2012.2202215ISI: 000305572600001ScopusID: 2-s2.0-84862565201OAI: oai:DiVA.org:kth-190012DiVA: diva2:950370
QC 201608152016-07-292016-07-292016-08-16Bibliographically approved