Zero-Birefringence Silicon Slot Waveguides with L-Rails
| Autor: | Srinivas Talabattula, Shafeek A. Samad |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0301 basic medicine
Birefringence Materials science Silicon business.industry Modal analysis Physics::Optics chemistry.chemical_element law.invention 03 medical and health sciences Wavelength 030104 developmental biology 0302 clinical medicine Optics chemistry law Modulation Slab Photonics business Waveguide 030217 neurology & neurosurgery |
| Zdroj: | 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC). |
| DOI: | 10.1109/cleoe-eqec.2019.8872828 |
| Popis: | Silicon slot waveguides are widely used for photonic sensing [1] and optical signal procesing [2]. We propose a novel slot formed when a sub-micron rib waveguide is slit with vertical symmetry resulting in L shaped rails to have Zero Birefringence (ZB). This geometry gives the flexibility to choose the slab (strip-load) region for doping or modulation. Index modulation of the slab sidewall offers platform for Bragg gratings with sub-nanometer stop bands [3,4]. We show that slots with L-rails possess better confinement and higher tolerance to sidewall width variations compared to strip-rails [5] and ZB can be achieved by engineering the waveguide geometry. Optimal waveguide-dimensions at a wavelength λ = 1550 nm are designed from modal analysis through full-vectorial computations. |
| Databáze: | OpenAIRE |
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