| Download | - View final version: Reconfigurable terahertz metasurfaces coherently controlled by wavelength-scale-structured light (PDF, 3.2 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1515/nanoph-2021-0501 |
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| Author | Search for: Jana, Kamalesh; Search for: Okocha, Emmanuel; Search for: Møller, Søren H.; Search for: Mi, Yonghao; Search for: Sederberg, ShawnORCID identifier: https://orcid.org/0000-0001-8118-1445; Search for: Corkum, Paul B. |
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| Format | Text, Article |
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| Subject | coherent control; metasurfaces; optoelectronics; structured light; tetrahertz radiation; ultrafast optics |
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| Abstract | Structuring light–matter interaction at a deeply subwavelength scale is fundamental to optical metamaterials and metasurfaces. Conventionally, the operation of a metasurface is determined by the collective electric polarization response of its lithographically defined structures. The inseparability of electric polarization and current density provides the opportunity to construct metasurfaces from current elements instead of nanostructures. Here, we realize metasurfaces using structured light rather than structured materials. Using coherent control, we transfer structure from light to transient currents in a semiconductor, which act as a source for terahertz radiation. A spatial light modulator is used to control the spatial structure of the currents and the resulting terahertz radiation with a resolution of 5.6 ± 0.8 μm, or approximately λ/54 at a frequency of 1 THz. The independence of the currents from any predefined structures and the maturity of spatial light modulator technology enable this metasurface to be reconfigured with unprecedented flexibility. |
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| Publication date | 2021-11-11 |
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| Publisher | Walter de Gruyter |
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| Language | English |
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| Peer reviewed | Yes |
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| NRC publication | This is a non-NRC publication"Non-NRC publications" are publications authored by NRC employees prior to their employment by NRC. |
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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 | b0bbf6b2-ba4c-41c1-aa7b-baa70ec11656 |
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| Record created | 2024-01-17 |
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| Record modified | 2024-01-17 |
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