NDLI: Very High Absorption of Traveling Wave Photodetectors in Superconducting Fiber Plasmon

Content Provider	Springer Nature Link
Author	Popescu, V. A.
Copyright Year	2012
Abstract	By using a finite element method, we investigate a new, very sensitive, superconducting traveling wave photodetector made by an optical fiber, which includes a high index layer (LaAlO$_{3}$) with small losses, a number of metallic (gold) cylinders, and a single active superconducting layer (YBCO). Although in our structure of the fiber with 32 smaller gold cylinders, the number of the modes is large (3 nondegenerate modes and 16 twofold degenerate modes), the imaginary parts of the HE$_{11}$, TM$_{01}$, HE$_{12}$, and higher order plasmon modes and also the power absorption (0.93 for HE$_{11}$,0.91 for HE$_{12}$,0.95 for TM$_{01}$ and larger than 0.93 for all higher order plasmon modes) in the active superconducting layer are larger in comparison with that of a fundamental mode from a LaAlO$_{3}$–YBCO–Au planar waveguide or with that of the HE$_{11}$, TM$_{01}$, HE$_{12}$ modes from a model previously published where the gold cylinders are replaced with a single gold layer. The nondegenerate HE$_{11}$ mode and the highest nondegenerate plasmon mode are highly confined in the YBCO layer in the space between the neighboring gold cylinders. Also, the plasmon mode TM$_{01}$ is highly confined in the YBCO layer but on the exterior surface of the gold cylinders. The HE$_{12}$ and the higher plasmon modes are highly confined in the YBCO layer in the space between the neighboring gold cylinders or very close to their exterior surface. The confinement regimes of the light and the power absorption efficiency in the superconducting layer can be optimized by only acting on the fiber geometry.
Starting Page	243
Ending Page	250
Page Count	8
File Format	PDF
ISSN	15571939
Journal	Journal of Superconductivity and Novel Magnetism
Volume Number	26
Issue Number	2
e-ISSN	15571947
Language	English
Publisher	Springer US
Publisher Date	2012-12-14
Publisher Place	Boston
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Optical fiber Plasmonic optical waveguides Superconductive optical waveguides Cuprate superconductors Finite element method Strongly Correlated Systems, Superconductivity Magnetism, Magnetic Materials Condensed Matter Physics Characterization and Evaluation of Materials
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Condensed Matter Physics

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