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dc.contributor.authorDullo, Firehun Tsige
dc.contributor.authorTinguely, Jean-Claude
dc.contributor.authorSolbø, Stian
dc.contributor.authorHellesø, Olav Gaute
dc.date.accessioned2016-03-10T09:25:21Z
dc.date.available2016-03-10T09:25:21Z
dc.date.issued2015-01-07
dc.description.abstractThe single-mode limit and bending losses for shallow rib waveguides are studied using the full vectorial film mode matching method. The maximum rib height for single-mode waveguides is found to be on the order of 10 nm for a rib width of 2 m and a wavelength of 785 nm, with the exact value depending on the core thickness and the polarization. Bending losses are calculated as a function of several geometrical parameters, for both polarizations and for the fundamental and the first order modes. Bending losses decrease significantly with rib height for single-mode waveguides. For slightly larger rib heights, giving multimode waveguides, it is found that the bending losses for the first-order mode are several orders of magnitude larger than for the fundamental mode. Thus, a small bend can act as an excellent mode filter, making it possible to use higher ribs giving low bending losses for the fundamental mode, while maintaining the waveguide practically single-mode. For TM-polarization, leakage loss can be important and can cause bending losses to increase for larger rib heights (8–80 nm).en_US
dc.descriptionPublished version also available at <a href=http://dx.doi.org/10.1109/JPHOT.2014.2387252>http://dx.doi.org/10.1109/JPHOT.2014.2387252</a>.en_US
dc.identifier.citationIEEE Photonics Journal 2015, 7(1)en_US
dc.identifier.cristinIDFRIDAID 1251401
dc.identifier.doi10.1109/JPHOT.2014.2387252
dc.identifier.issn1943-0655
dc.identifier.urihttps://hdl.handle.net/10037/8823
dc.identifier.urnURN:NBN:no-uit_munin_8430
dc.language.isoengen_US
dc.publisherInstitute of Electrical and Electronics Engineersen_US
dc.rights.accessRightsopenAccess
dc.subjectBending lossen_US
dc.subjectsingle-mode limiten_US
dc.subjectfilm mode matching methoden_US
dc.subjectintegrated opticsen_US
dc.subjectrib waveguidesen_US
dc.subjectVDP::Teknologi: 500en_US
dc.subjectVDP::Technology: 500en_US
dc.titleSingle-mode limit and bending losses for shallow Rib Si3N4 waveguidesen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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