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Low-index-material-based nano-slot waveguide with quasi-Bragg-reflector buffer
2008 (English)In: Electronics Letters, ISSN 0013-5194, E-ISSN 1350-911X, Vol. 44, no 23, 1554-+ p.Article in journal (Refereed) Published
Abstract [en]

A low-index-material-based nano-slot waveguide based on a quasi-Bragg-reflector buffer is presented. This quasi-Bragg-reflector buffer includes alternating low and high refractive index dielectric layers. The thicknesses of these dielectric layers are chosen optimally by using a genetic algorithm so that the leakage loss of the present optical waveguide is minimised. An SiO2-based slot-waveguide is designed as an example and the quasi-Bragg-reflector buffer is formed by using several Si/SiO2 bilayers. The theoretical leakage loss for an SiO2-based slot-waveguide with three optimised Si/SiO2 bilayers is about 0.01 dB/mm (at 1550 nm). The modal analysis with a full-vectorial finite-difference method shows that the present slot waveguide has an enhancement of the field distribution in the nano-slot region.

Place, publisher, year, edition, pages
2008. Vol. 44, no 23, 1554-+ p.
Identifiers
URN: urn:nbn:se:kth:diva-18000DOI: 10.1049/el:20081410ISI: 000261150200013OAI: oai:DiVA.org:kth-18000DiVA: diva2:336045
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2017-12-12Bibliographically approved

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He, Sailing

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