Radiation modes and roughness loss in high index-contrast waveguides

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dc.contributor.author Poulton, Christopher en_US
dc.contributor.author Koos, Christian en_US
dc.contributor.author Fujii, Masafumi en_US
dc.contributor.author Freude, Wolfgang en_US
dc.contributor.author Leuthold, Juerg en_US
dc.contributor.author Pfrang, Andreas en_US
dc.contributor.author Schimmel, Thomas en_US
dc.date.accessioned 2009-06-26T04:12:54Z
dc.date.available 2009-06-26T04:12:54Z
dc.date.issued 2006 en_US
dc.identifier 2008003017 en_US
dc.identifier.citation Poulton Christopher et al. 2006, 'Radiation modes and roughness loss in high index-contrast waveguides', IEEE Publications, vol. 12, no. 6, pp. 1306-1321. en_US
dc.identifier.issn 1077-260X en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/717
dc.description.abstract We predict the scattering loss in rectangular high index-contrast waveguides, using a new variation of the classical approach of coupled-mode theory. The loss predicted by this three-dimensional (3-D) model is considerably larger than that calculated using previous treatments that approximate the true 3-D radiation modes with their two-dimensional counterparts. The 3-D radiation modes of the ideal waveguide are expanded in a series of cylindrical harmonics, and the coupling between the guided and radiation modes due to the sidewall perturbation is computed. The waveguide attenuation can then be calculated semianalytically. It is found that the dominant loss mechanism is radiation rather than reflection, and that the transverse electric polarization exhibits much larger attenuation than transverse magnetic polarization. The method also gives simple rules that can be used in the design of low-loss optical waveguides. The structural properties of sidewall roughness of an InGaAs/InP pedestal waveguide are measured using atomic force microscopy, and the measured attenuation is found to compare well with that predicted by the model. en_US
dc.publisher IEEE Publications en_US
dc.relation.isbasedon http://dx.doi.org/10.1109/JSTQE.2006.881648 en_US
dc.title Radiation modes and roughness loss in high index-contrast waveguides en_US
dc.parent IEEE Journal of Selected Topics in Quantum Electronics en_US
dc.journal.volume 12 en_US
dc.journal.number 6 en_US
dc.publocation Piscataway, USA en_US
dc.identifier.startpage 1306 en_US
dc.identifier.endpage 1321 en_US
dc.cauo.name FEIT.Faculty of Engineering & Information Technology en_US
dc.conference Verified OK en_US
dc.for 020500 en_US
dc.personcode 102194 en_US
dc.personcode 0000043053 en_US
dc.personcode 0000043054 en_US
dc.personcode 0000043057 en_US
dc.personcode 0000043056 en_US
dc.personcode 0000049174 en_US
dc.personcode 0000049175 en_US
dc.percentage 100 en_US
dc.classification.name Optical Physics en_US
dc.classification.type FOR-08 en_US
dc.description.keywords Attenuation integrated optics radiation modes roughness waveguides en_US


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