Comparison and analysis of phase change materials-based reconfigurable silicon photonic directional couplers

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F22%3A39919295" target="_blank" >RIV/00216275:25310/22:39919295 - isvavai.cz</a>
Result on the web
<a href="https://opg.optica.org/ome/fulltext.cfm?uri=ome-12-2-606&id=468519" target="_blank" >https://opg.optica.org/ome/fulltext.cfm?uri=ome-12-2-606&id=468519</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OME.447289" target="_blank" >10.1364/OME.447289</a>

Result language
angličtina
Original language name
Comparison and analysis of phase change materials-based reconfigurable silicon photonic directional couplers
Original language description
The unique optical properties of phase change materials (PCMs) can be exploited to develop efficient reconfigurable photonic devices. Here, we design, model, and compare the perthrmance of programmable 1 x 2 optical couplers based on: Ge2Sb2Te5, Ge2Sb2Se4Te1, Sb2Se3, and Sb2S3 PCMs. Once programmed, these devices are passive, which can reduce the overall energy consumed compared to thermo-optic or electro-optic reconfigurable devices. Of all the PCMs studied, our ellipsometry refractive index measurements show that Sb2S3 has the lowest absorption in the telecommunications wavelength band. Moreover, Sb2S3 -based couplers show the best overall performance, with the lowest insertion losses in both the amorphous and crystalline states. We show that by growth crystallization tuning at least four different coupling ratios can be reliably programmed into the Sb2S3 directional couplers. We used this effect to design a 2-bit tuneable Sb2S3 directional coupler with a dynamic range close to 32 dB. The bit-depth of the coupler appears to be limited by the crystallization stochasticity. (C) 2022 Optica Publishing Group under the terms of the Optica Open Access Publishing Agreement
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20501 - Materials engineering

Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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