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| Main Authors: | , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2016
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/1605.06392 |
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| _version_ | 1866918189196115968 |
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| author | de Corny, Maeliss Ethis Chauvet, Nicolas Laurent, Guillaume Jeannin, Mathieu Olgeirsson, Logi Drezet, Aurélien Huant, Serge Dantelle, Géraldine Nogues, Gilles Bachelier, Guillaume |
| author_facet | de Corny, Maeliss Ethis Chauvet, Nicolas Laurent, Guillaume Jeannin, Mathieu Olgeirsson, Logi Drezet, Aurélien Huant, Serge Dantelle, Géraldine Nogues, Gilles Bachelier, Guillaume |
| contents | The outstanding optical properties for plasmon resonances in noble metal nanoparticles enable the observation of non-linear optical processes such as second-harmonic generation (SHG) at the nanoscale. Here, we investigate the SHG process in single rectangular aluminum nanoantennas and demonstrate that i) a doubly resonant regime can be achieved in very compact nanostructures, yielding a 7.5 enhancement compared to singly resonant structures and ii) the \(χ_{\perp\perp\perp}\) local surface and \(γ_{bulk}\) nonlocal bulk contributions can be separated while imaging resonant nanostructures excited by a tightly focused beam, provided the \(χ_{\perp\parallel\parallel}\) local surface is assumed to be zero, as it is the case in all existing models for metals. Thanks to the quantitative agreement between experimental and simulated far-field SHG maps, taking into account the real experimental configuration (focusing and substrate), we identify the physical origin of the SHG in aluminum nanoantennas as arising mainly from \(χ_{\perp\perp\perp}\) local surface sources. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_1605_06392 |
| institution | arXiv |
| publishDate | 2016 |
| record_format | arxiv |
| spellingShingle | Wave-mixing origin and optimization in single and compact aluminum nanoantennas de Corny, Maeliss Ethis Chauvet, Nicolas Laurent, Guillaume Jeannin, Mathieu Olgeirsson, Logi Drezet, Aurélien Huant, Serge Dantelle, Géraldine Nogues, Gilles Bachelier, Guillaume Optics The outstanding optical properties for plasmon resonances in noble metal nanoparticles enable the observation of non-linear optical processes such as second-harmonic generation (SHG) at the nanoscale. Here, we investigate the SHG process in single rectangular aluminum nanoantennas and demonstrate that i) a doubly resonant regime can be achieved in very compact nanostructures, yielding a 7.5 enhancement compared to singly resonant structures and ii) the \(χ_{\perp\perp\perp}\) local surface and \(γ_{bulk}\) nonlocal bulk contributions can be separated while imaging resonant nanostructures excited by a tightly focused beam, provided the \(χ_{\perp\parallel\parallel}\) local surface is assumed to be zero, as it is the case in all existing models for metals. Thanks to the quantitative agreement between experimental and simulated far-field SHG maps, taking into account the real experimental configuration (focusing and substrate), we identify the physical origin of the SHG in aluminum nanoantennas as arising mainly from \(χ_{\perp\perp\perp}\) local surface sources. |
| title | Wave-mixing origin and optimization in single and compact aluminum nanoantennas |
| topic | Optics |
| url | https://arxiv.org/abs/1605.06392 |