| Download | - View final version: Suspended germanium waveguides with subwavelength-grating metamaterial cladding for the mid-infrared band (PDF, 3.8 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1364/OE.422764 |
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| Author | Search for: Sánchez-Postigo, AlejandroORCID identifier: https://orcid.org/0000-0003-4782-0105; Search for: Ortega-Moñux, Alejandro; Search for: Soler Penadés, Jordi; Search for: Osman, AhmedORCID identifier: https://orcid.org/0000-0001-6575-3861; Search for: Nedeljkovic, MilosORCID identifier: https://orcid.org/0000-0002-9170-7911; Search for: Qu, Zhibo; Search for: Wu, YangboORCID identifier: https://orcid.org/0000-0002-4838-9591; Search for: Molina-Fernández, ÍñigoORCID identifier: https://orcid.org/0000-0001-9596-4117; Search for: Cheben, Pavel1ORCID identifier: https://orcid.org/0000-0003-4232-9130; Search for: Mashanovich, Goran Z.; Search for: Wangüemert-Pérez, J. GonzaloORCID identifier: https://orcid.org/0000-0002-9201-4463 |
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| Affiliation | - National Research Council Canada. Advanced Electronics and Photonics
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| Funder | Search for: Ministerio de Ciencia, Innovación y Universidades; Search for: Consejería de Economía, Conocimiento, Empresas y Universidad, Junta de Andalucía; Search for: Universidad de Málaga; Search for: Engineering and Physical Sciences Research Council |
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| Format | Text, Article |
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| Physical description | 12 p. |
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| Abstract | In recent years, sensing and communication applications have fueled important developments of group-IV photonics in the mid-infrared band. In the long-wave range, most platforms are based on germanium, which is transparent up to ∼15-µm wavelength. However, those platforms are limited by the intrinsic losses of complementary materials or require complex fabrication processes. To overcome these limitations, we propose suspended germanium waveguides with a subwavelength metamaterial lateral cladding that simultaneously provides optical confinement and allows structural suspension. These all-germanium waveguides can be fabricated in one dry and one wet etch step. A propagation loss of 5.3 dB/cm is measured at a wavelength of 7.7 µm. These results open the door for the development of integrated devices that can be fabricated in a simple manner and can potentially cover the mid-infrared band up to ∼15 µm. |
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| Publication date | 2021-05-17 |
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| Publisher | Optica Publishing Group |
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| Licence | |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 9c250e57-f83d-4e34-b20e-e26674cedda5 |
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| Record created | 2022-11-03 |
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| Record modified | 2022-11-03 |
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