| DOI | Trouver le DOI : https://doi.org/10.1117/12.2522050 |
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| Auteur | Rechercher : Luque-González, José Manuel; Rechercher : Herrero-Bermello, Alaine; Rechercher : Ortega-Moñux, Alejandro; Rechercher : Molina-Fernández, Íñigo; Rechercher : Villafranca Velasco, Aitor; Rechercher : Cheben, Pavel1; Rechercher : Schmid, Jens H.1; Rechercher : Wang, Shurui1; Rechercher : Halir, Robert |
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| Éditeur | Rechercher : Cheben, Pavel; Rechercher : Čtyroký, Jiří; Rechercher : Molina-Fernández, Iñigo |
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| Affiliation | - Conseil national de recherches du Canada. Électronique et photonique avancées
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| Format | Texte, Article |
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| Conférence | Integrated Optics: Design, Devices, Systems and Applications, April 1-4, 2019, Prague, Czech Republic |
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| Sujet | polarization; metamaterials; homogenization; anisotropy; beam splitters; optical design |
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| Résumé | Subwavelength gratings (SWG) are periodic structures which behave as controllable homogeneous metamaterials. SWGs are extremely interesting when they are used in platforms with a limited choice of material refractive indices, enabling the design of a myriad of high-performance devices. Here we present a novel technique to gain control over the intrinsic anisotropy of the synthesized metamaterial. We show that tilting the silicon segments in a SWG structure mainly affects the in-plane (TE) modes, with little impact on the out-of-plane (TM) modes. Moreover, we present a methodology to quickly but accurately calculate the modes of a tilted periodic structure modeling the structure as a rotated uniaxial crystal which can be solved with an anisotropic mode solver. Measurements on a set of fabricated tilted SWG waveguides validate our simulation results. By using the presented technique, we design a polarization beam splitter based on a 2x2 multimode interferometer. The design is based on the optimization of the tilting angle to tone the beat length of the TE modes to be a half of the beat length of the TM modes. |
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| Date de publication | 2019-04-26 |
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| Maison d’édition | SPIE |
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| Dans | |
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| Série | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 70dc7d45-5ecb-4f42-9754-32ab5223c603 |
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| Enregistrement créé | 2021-02-22 |
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| Enregistrement modifié | 2021-02-22 |
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