We successfully overcome the problem of cross-talk in multiplexed metasurface design and realize the multiplexed metasurface with five printing images in both theoretical and experimental aspects,by employing the cohe...We successfully overcome the problem of cross-talk in multiplexed metasurface design and realize the multiplexed metasurface with five printing images in both theoretical and experimental aspects,by employing the coherent pixel design considering coherent superposition of all the sub-elements.Compared with most previous studies where the integrated printing images were usually no more than three,our study shows obvious improvement.More importantly,in our approach all the sub-elements,which were crystalline silicon nanobricks with the size of 320×80×230 nm^3,were arranged in a square space of 1.45×1.45μm^2 following the closest packing way,enabling our multiplexed metasurface to have a potential of effective physical information capacity of printing image reaching the optical diffraction limit.Our study not only enlarges the information capacity of metasurfaces by expanding the integrated number of printing image in one metasurface,but also can promote metasurface applications in various fields such as information storage and encoding.展开更多
Photonic structures with optical resonances beyond a single controllable mode are strongly desired for enhancing light±matter interactions and bringing about advanced photonic devices. However, the realization of...Photonic structures with optical resonances beyond a single controllable mode are strongly desired for enhancing light±matter interactions and bringing about advanced photonic devices. However, the realization of effective multimodal photonic structures has been restricted by the limited tunable range of mode manipulation, the spatial dispersions of electric fields or the polarization-dependent excitations. To overcome these limitations, we create a dualmode metasurface by integrating the plasmonic surface lattice resonance and the gap plasmonic modes;this metasurface offers a widely tunable spectral range, good overlap in the spatial distribution of electric fields, and polarization independence of excitation light. To show that such dual-mode metasurfaces are versatile platforms for enhancing light±matter interactions, we experimentally demonstrate a significant enhancement of second-harmonic generation using our design, with a conversion efficiency of 1±3 orders of magnitude larger than those previously obtained in plasmonic systems. These results may inspire new designs for functional multimodal photonic structures.展开更多
基金Supported by the National Natural Science Foundation of China(Grant Nos.11974437 and 61675237)the Guangdong Natural Science Funds for Distinguished Young Scholars(Grant No.2017B030306007)+1 种基金the Guangdong Special Support Program(Grant No.2017TQ04C487)the Pearl River S&T Nova Program of Guangzhou(Grant No.201806010033)。
文摘We successfully overcome the problem of cross-talk in multiplexed metasurface design and realize the multiplexed metasurface with five printing images in both theoretical and experimental aspects,by employing the coherent pixel design considering coherent superposition of all the sub-elements.Compared with most previous studies where the integrated printing images were usually no more than three,our study shows obvious improvement.More importantly,in our approach all the sub-elements,which were crystalline silicon nanobricks with the size of 320×80×230 nm^3,were arranged in a square space of 1.45×1.45μm^2 following the closest packing way,enabling our multiplexed metasurface to have a potential of effective physical information capacity of printing image reaching the optical diffraction limit.Our study not only enlarges the information capacity of metasurfaces by expanding the integrated number of printing image in one metasurface,but also can promote metasurface applications in various fields such as information storage and encoding.
基金supported by the National Key R&D Program of China (2016YFA0301300)the National Natural Science Foundation of China (11974437 and 91750207)+6 种基金the Key-Area Research and Development Program of Guangdong Province (2018B030329001)Guangdong Special Support Program (2017TQ04C487)Guangdong Natural Science Funds for Distinguished Young Scholars (2017B030306007)Guangdong Natural Science Funds (2020A0505140004)Pearl River S&T Nova Program of Guangzhou (201806010033)the Open Fund of IPOC (BUPT) (IPOC2019A003)the Fundamental Research Funds for the Central Universities (20lgzd30)。
文摘Photonic structures with optical resonances beyond a single controllable mode are strongly desired for enhancing light±matter interactions and bringing about advanced photonic devices. However, the realization of effective multimodal photonic structures has been restricted by the limited tunable range of mode manipulation, the spatial dispersions of electric fields or the polarization-dependent excitations. To overcome these limitations, we create a dualmode metasurface by integrating the plasmonic surface lattice resonance and the gap plasmonic modes;this metasurface offers a widely tunable spectral range, good overlap in the spatial distribution of electric fields, and polarization independence of excitation light. To show that such dual-mode metasurfaces are versatile platforms for enhancing light±matter interactions, we experimentally demonstrate a significant enhancement of second-harmonic generation using our design, with a conversion efficiency of 1±3 orders of magnitude larger than those previously obtained in plasmonic systems. These results may inspire new designs for functional multimodal photonic structures.
