All-Dielectric Two-Dimensional Metamaterial Claddings for Evanescent Field Engineering of Quasi-TM Modes

The engineering of evanescent fields from optical waveguides can increase the density level of integrated optical devices. The replacement of an all-isotropic cladding by an all-dielectric metamaterial one provides greater control of the evanescent fields. This study investigates the performance of...

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Bibliographic Details
Published in:IEEE journal of quantum electronics 2021-10, Vol.57 (5), p.1-4
Main Author: Malheiros-Silveira, Gilliard N.
Format: Article
Language:English
Subjects:
bend loss
bend waveguides
Bending
Bends
Claddings
Dielectrics
Indexes
integrated optics
Metamaterial
Metamaterials
Optical variables control
Optical waveguides
Refractivity
Silicon
Silicon dioxide
silicon nitride waveguides
Strips
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Summary:The engineering of evanescent fields from optical waveguides can increase the density level of integrated optical devices. The replacement of an all-isotropic cladding by an all-dielectric metamaterial one provides greater control of the evanescent fields. This study investigates the performance of an all-dielectric two-dimensional metamaterial cladding in strip waveguides. The waveguide core and higher refractive index of the metamaterial cladding are composed of the same material, and for sake of numerical demonstration, Si 3 N 4 was used as a higher refractive index embedded in SiO 2 (lower refractive index). The advantages of such an approach are investigated in waveguide bends. By comparing the metamaterial cladding proposal to a conventional cladding (all-isotropic one), the quasi-TM mode presented a reduction of about 61.5% of bending loss per 180° turn.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.2021.3106969