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11 June 2024 All-optical ultrafast polarization switching with nonlinear plasmonic metasurfaces
Heng Wang, Guixin Li, Zixian Hu, Junhong Deng, Jiafei Chen
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Proceedings Volume PC12990, Metamaterials XIV; PC129901B (2024) https://doi.org/10.1117/12.3014685
Event: SPIE Photonics Europe, 2024, Strasbourg, France
Abstract
Optical switching has important applications in optical information processing, optical computing and optical communications. The long-term pursuit of optical switch is to achieve short switching time and large modulation depth. Among various mechanisms, all-optical switching based on Kerr effect represents a promising solution. However, it is usually difficult to compromise both switching time and modulation depth of a Kerr-type optical switch. To circumvent this constraint, symmetry selective polarization switching via Second-Harmonic Generation (SHG) has been attracting scientists’ attention. Here, we demonstrate SHG-based all-optical ultrafast polarization switching by using geometric phase controlled nonlinear plasmonic metasurfaces. A switching time of hundreds of femtoseconds and a near-unity modulation depth were experimentally demonstrated. The function of dual-channel all-optical switching was also demonstrated on a metasurface which consists of spatially variant meta-atoms. The nonlinear metasurface proposed here represents an important platform for developing all-optical ultrafast switches and would benefit the area of optical information processing.
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Heng Wang, Guixin Li, Zixian Hu, Junhong Deng, and Jiafei Chen "All-optical ultrafast polarization switching with nonlinear plasmonic metasurfaces", Proc. SPIE PC12990, Metamaterials XIV, PC129901B (11 June 2024); https://doi.org/10.1117/12.3014685
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KEYWORDS
Optoelectronics
Nonlinear optics
Electrical conductivity
Oxides
Transient nonlinear optics
Statistical analysis
Statistical modeling
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