A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces
Abstract We present strong enhancement of third harmonic generation in an amorphous silicon metasurface consisting of elliptical nano resonators. We show that this enhancement originates from a new type of multi-mode Fano mechanism. These ‘Super-Fano’ resonances are investigated numerically in great...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Nature Publishing Group
2023-04-01
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| Series: | Light: Science & Applications |
| Online Access: | https://doi.org/10.1038/s41377-023-01134-1 |
| _version_ | 1797840816537862144 |
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| author | David Hähnel Christian Golla Maximilian Albert Thomas Zentgraf Viktor Myroshnychenko Jens Förstner Cedrik Meier |
| author_facet | David Hähnel Christian Golla Maximilian Albert Thomas Zentgraf Viktor Myroshnychenko Jens Förstner Cedrik Meier |
| author_sort | David Hähnel |
| collection | DOAJ |
| description | Abstract We present strong enhancement of third harmonic generation in an amorphous silicon metasurface consisting of elliptical nano resonators. We show that this enhancement originates from a new type of multi-mode Fano mechanism. These ‘Super-Fano’ resonances are investigated numerically in great detail using full-wave simulations. The theoretically predicted behavior of the metasurface is experimentally verified by linear and nonlinear transmission spectroscopy. Moreover, quantitative nonlinear measurements are performed, in which an absolute conversion efficiency as high as η max ≈ 2.8 × 10−7 a peak power intensity of 1.2 GW cm−2 is found. Compared to an unpatterned silicon film of the same thickness amplification factors of up to ~900 are demonstrated. Our results pave the way to exploiting a strong Fano-type multi-mode coupling in metasurfaces for high THG in potential applications. |
| first_indexed | 2024-04-09T16:20:50Z |
| format | Article |
| id | doaj.art-ca6d796a37084a8c93180d0c159be6c4 |
| institution | Directory Open Access Journal |
| issn | 2047-7538 |
| language | English |
| last_indexed | 2024-04-09T16:20:50Z |
| publishDate | 2023-04-01 |
| publisher | Nature Publishing Group |
| record_format | Article |
| series | Light: Science & Applications |
| spelling | doaj.art-ca6d796a37084a8c93180d0c159be6c42023-04-23T11:28:42ZengNature Publishing GroupLight: Science & Applications2047-75382023-04-011211810.1038/s41377-023-01134-1A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfacesDavid Hähnel0Christian Golla1Maximilian Albert2Thomas Zentgraf3Viktor Myroshnychenko4Jens Förstner5Cedrik Meier6Theoretical Electrical Engineering & CeOPP, Paderborn UniversityPhysics Department & CeOPP, Paderborn UniversityPhysics Department & CeOPP, Paderborn UniversityPhysics Department & CeOPP, Paderborn UniversityTheoretical Electrical Engineering & CeOPP, Paderborn UniversityTheoretical Electrical Engineering & CeOPP, Paderborn UniversityPhysics Department & CeOPP, Paderborn UniversityAbstract We present strong enhancement of third harmonic generation in an amorphous silicon metasurface consisting of elliptical nano resonators. We show that this enhancement originates from a new type of multi-mode Fano mechanism. These ‘Super-Fano’ resonances are investigated numerically in great detail using full-wave simulations. The theoretically predicted behavior of the metasurface is experimentally verified by linear and nonlinear transmission spectroscopy. Moreover, quantitative nonlinear measurements are performed, in which an absolute conversion efficiency as high as η max ≈ 2.8 × 10−7 a peak power intensity of 1.2 GW cm−2 is found. Compared to an unpatterned silicon film of the same thickness amplification factors of up to ~900 are demonstrated. Our results pave the way to exploiting a strong Fano-type multi-mode coupling in metasurfaces for high THG in potential applications.https://doi.org/10.1038/s41377-023-01134-1 |
| spellingShingle | David Hähnel Christian Golla Maximilian Albert Thomas Zentgraf Viktor Myroshnychenko Jens Förstner Cedrik Meier A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces Light: Science & Applications |
| title | A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces |
| title_full | A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces |
| title_fullStr | A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces |
| title_full_unstemmed | A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces |
| title_short | A multi-mode super-fano mechanism for enhanced third harmonic generation in silicon metasurfaces |
| title_sort | multi mode super fano mechanism for enhanced third harmonic generation in silicon metasurfaces |
| url | https://doi.org/10.1038/s41377-023-01134-1 |
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