期刊
PHYSICAL REVIEW LETTERS
卷 126, 期 3, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.126.033901
关键词
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资金
- Academy of Finland [308596]
- Flagship of Photonics Research and Innovation (PREIN) - Academy of Finland [320165]
- European Research Council (ERC) under the European Union's Horizon 2020 Research and Innovation Programme [639109, 724881]
- National Research Foundation (NRF) - Ministry of Science and ICT of the Korean Government [NRF-2019R1A2C3003129, CAMM-2019M3A6B3030637, NRF-2019R1A5A8080290, NRF-2020K1A3A1A21024374]
- Hyundai Motor Chung Mong-Koo Foundation
- NRF Global Ph.D. fellowship - Ministry of Education of the Korean government [NRF-2017H1A2A1043204]
- National Research Foundation of Korea [2020K1A3A1A21024374] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
This study demonstrates phase-matched second-harmonic generation (SHG) from three-dimensional metamaterials consisting of stacked metasurfaces. By utilizing phase engineering of metasurfaces at interacting wavelengths, they achieved phase-matched SHG in the unconventional backward direction, with SHG signal scaling superlinearly with the number of layers. Their results inspire further research to achieve higher conversion efficiencies and address more complex wave fronts.
We demonstrate phase-matched second-harmonic generation (SHG) from three-dimensional metamaterials consisting of stacked metasurfaces. To achieve phase matching, we utilize a novel mechanism based on phase engineering of the metasurfaces at the interacting wavelengths, facilitating phase-matched SHG in the unconventional backward direction. Stacking up to five metasurfaces,we obtain a phase-matched SHG signal, which scales superlinearly with the number of layers. Our results motivate further investigations to achieve higher conversion efficiencies also with more complex wave fronts.
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