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Layered metal-dielectric waveguide: subwavelength guidance, leveraged modulation sensitivity in mode index, and reversed mode ordering
KTH, School of Information and Communication Technology (ICT), Optics and Photonics, Photonics.ORCID iD: 0000-0002-3368-9786
KTH, School of Information and Communication Technology (ICT), Optics and Photonics, Photonics.
KTH, School of Information and Communication Technology (ICT), Optics and Photonics, Photonics.
2011 (English)In: Optics Express, ISSN 1094-4087, E-ISSN 1094-4087, Vol. 19, no 4, 3818-3824 p.Article in journal (Refereed) Published
Abstract [en]

We describe a layered metal-dielectric waveguide, whose fundamental mode has an effective index as high as 7.35 at 1.55 mu m, enabling subwavelength spatial confinement. The loss is found to be reasonable in relation to the confinement. The indefinite dielectric tensor of the stratified metamaterial core generally leads to multimode operation of the waveguide, exhibiting a "reversed" mode ordering contrary to conventional waveguides. The waveguide features a strong leveraging in modal index change subject to a change of index in the dielectric layers, opening the design possibilities of very compact active electro-optic devices.

Place, publisher, year, edition, pages
2011. Vol. 19, no 4, 3818-3824 p.
Keyword [en]
Dielectric layer, Dielectric tensors, Effective index, Electrooptic devices, Metal-dielectric waveguide, Modal index, Mode index, Modulation sensitivity, Multimode operations, Spatial confinement, Sub-wavelength, Subwavelength guidance, Metamaterials
National Category
Telecommunications
Identifiers
URN: urn:nbn:se:kth:diva-32606DOI: 10.1364/OE.19.003818ISI: 000288860000102Scopus ID: 2-s2.0-79951610643OAI: oai:DiVA.org:kth-32606DiVA: diva2:411928
Funder
Swedish Research Council
Note
QC 20110420Available from: 2011-04-20 Created: 2011-04-18 Last updated: 2017-12-11Bibliographically approved

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Yan, Min

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