Layered metal-dielectric waveguide: subwavelength guidance, leveraged modulation sensitivity in mode index, and reversed mode ordering

We describe a layered metal-dielectric waveguide, whose fundamental mode has an effective index as high as 7.35 at 1.55 μm, enabling subwavelength spatial confinement. The loss is found to be reasonable in relation to the confinement. The indefinite dielectric tensor of the stratified metamaterial c...

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Bibliographic Details
Published inOptics express Vol. 19; no. 4; pp. 3818 - 3824
Main Authors Yan, Min, Thylén, Lars, Qiu, Min
Format Journal Article
LanguageEnglish
Published United States 14.02.2011
Subjects
Dielectric layer
Dielectric tensors
Effective index
Electrical engineering, electronics and photonics
Electrooptic devices
Elektroteknik, elektronik och fotonik
Fotonik
Metal-dielectric waveguide
Metamaterials
Modal index
Mode index
Modulation sensitivity
Multimode operations
Photonics
Spatial confinement
Sub-wavelength
Subwavelength guidance
TECHNOLOGY
TEKNIKVETENSKAP
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Summary:We describe a layered metal-dielectric waveguide, whose fundamental mode has an effective index as high as 7.35 at 1.55 μm, 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.
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ISSN:1094-4087
1094-4087
DOI:10.1364/OE.19.003818