All-Optical Hybrid VO2/Si Waveguide Absorption Switch at Telecommunication Wavelengths
[EN] Vanadium dioxide (VO2) is one of the most promising materials for developing hybrid photonic integrated circuits (PICs). At telecommunication wavelengths, VO2 exhibits a large change on the refractive index (¿n ~ 1 and ¿¿ ~ 2.5) between its insulating and metallic state. Such insulating-to-meta...
| Autores: | , , , , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2021 |
| País: | España |
| Recursos: | Universitat Politècnica de València (UPV) |
| Repositório: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia |
| Idioma: | inglês |
| OAI Identifier: | oai:riunet.upv.es:10251/189376 |
| Acesso em linha: | https://riunet.upv.es/handle/10251/189376 |
| Access Level: | Acceso aberto |
| Palavra-chave: | Optical switching Photonic integration Silicon photonics Vanadium dioxide |
| Resumo: | [EN] Vanadium dioxide (VO2) is one of the most promising materials for developing hybrid photonic integrated circuits (PICs). At telecommunication wavelengths, VO2 exhibits a large change on the refractive index (¿n ~ 1 and ¿¿ ~ 2.5) between its insulating and metallic state. Such insulating-to-metal transition (IMT) can be triggered by light, which could enable all-optical hybridVO2-waveguide devices. Here, we experimentally demonstrate an all-optical absorption switch using a hybridVO2/Si waveguide fully compatible with the silicon photonics platform. All-optical characterization was carried out for TE polarization and at telecommunication wavelengths using an in-plane approach. The temporal dynamics were retrieved by means of pump-probe measurements. Our results show an extinction ratio of 0.7 dB/¿m with a maximum switchable length of 15 ¿m, a switching speed as low as 318 ns, and an energy per switch of 15.8 nJ. The inherit large optical bandwith of a non-resonant waveguide poses this device as a promising candidate for developing all-optical and broadband silicon PICs. |
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