تقرير
Enhanced third-harmonic generation induced by nonlinear field resonances in plasmonic-graphene metasurfaces
| العنوان: | Enhanced third-harmonic generation induced by nonlinear field resonances in plasmonic-graphene metasurfaces |
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| المؤلفون: | Liu, Yulian, Zhu, Shan, Zhou, Qingjia, Cao, Yanyan, Fu, Yangyang, Gao1, Lei, Chen, Huanyang, Xu, Yadong |
| سنة النشر: | 2020 |
| المجموعة: | Physics (Other) |
| مصطلحات موضوعية: | Physics - Optics, Physics - Applied Physics |
| الوصف: | Nonlinear metasurfaces offer new paradigm for boosting optical effect beyond limitations of conventional materials. In this work, we present an alternative way to produce pronounced third-harmonic generation (THG) based on nonlinear field resonances rather than linear field enhancement, which is a typical strategy for achieving strong nonlinear response. By designing and studying a nonlinear plasmonic-graphene metasurface at terahertz regime with hybrid guided modes and bound states in the continuum modes, it is found that a THG with a narrow bandwidth can be observed, thanks to the strong resonance between generated weak THG field and these modes. Such strong nonlinear field resonance greatly enhances the photon-photon interactions, thus resulting in a large effective nonlinear coefficient of the whole system. This finding provides new opportunity for studying nonlinear optical metasurfaces. Comment: Accepted by Optics Express |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1364/OE.391294 |
| الوصول الحر: | http://arxiv.org/abs/2004.06379Test |
| رقم الانضمام: | edsarx.2004.06379 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1364/OE.391294 |
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