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Nonlinear Dielectric Nanoantennas and Metasurfaces: Frequency Conversion and Wavefront Control
ACS Photonics ( IF 6.5 ) Pub Date : 2021-11-08 , DOI: 10.1021/acsphotonics.1c01356 Gustavo Grinblat 1
ACS Photonics ( IF 6.5 ) Pub Date : 2021-11-08 , DOI: 10.1021/acsphotonics.1c01356 Gustavo Grinblat 1
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High-index dielectric nanostructures can support optical resonances of electric and magnetic character with ultralow linear absorption. In contrast to plasmonics, they can be engineered to confine electromagnetic fields inside the resonator, amplifying intrinsic nonlinearities of the dielectric. In this Review I examine the ability of dielectric nanoantennas and metasurfaces for efficient harmonic generation and wave-mixing processes, as well as nonlinear wavefront manipulation of the incident and radiated light. A detailed comparison is made between the many nanoscopic dielectric configurations reported in the literature, evaluating the influence of the material, crystal symmetry, structure geometry, and the different resonances involved (electric and magnetic Mie modes, Fano resonances, and quasi-nonradiative states, including anapoles and quasi-bound states in the continuum). The nonlinear performance of the nanosystems is analyzed, with emphasis on frequency conversion efficiency and emission directionality control, also discussing recent advances in nonlinear imaging, nonlinear holography, and all-optical switching. The role of topology in nonlinear nanophotonics is reviewed in the end, and potential future directions in the field are laid out.
中文翻译：
非线性介质纳米天线和超表面：频率转换和波前控制
高指数介电纳米结构可以支持具有超低线性吸收的电和磁特性的光学共振。与等离子体激元相反，它们可以被设计成将电磁场限制在谐振器内，放大电介质的固有非线性。在这篇评论中，我研究了电介质纳米天线和超表面在高效谐波生成和波混合过程中的能力，以及入射光和辐射光的非线性波前处理能力。对文献中报道的许多纳米级电介质配置进行了详细比较，评估了材料、晶体对称性、结构几何形状和所涉及的不同共振（电和磁 Mie 模式、Fano 共振和准非辐射状态，包括连续统中的anapoles 和准束缚态）。分析了纳米系统的非线性性能，重点是频率转换效率和发射方向控制，还讨论了非线性成像、非线性全息和全光开关的最新进展。最后回顾了拓扑在非线性纳米光子学中的作用，并规划了该领域未来的潜在方向。
更新日期：2021-12-15
中文翻译：
非线性介质纳米天线和超表面：频率转换和波前控制
高指数介电纳米结构可以支持具有超低线性吸收的电和磁特性的光学共振。与等离子体激元相反，它们可以被设计成将电磁场限制在谐振器内，放大电介质的固有非线性。在这篇评论中，我研究了电介质纳米天线和超表面在高效谐波生成和波混合过程中的能力，以及入射光和辐射光的非线性波前处理能力。对文献中报道的许多纳米级电介质配置进行了详细比较，评估了材料、晶体对称性、结构几何形状和所涉及的不同共振（电和磁 Mie 模式、Fano 共振和准非辐射状态，包括连续统中的anapoles 和准束缚态）。分析了纳米系统的非线性性能，重点是频率转换效率和发射方向控制，还讨论了非线性成像、非线性全息和全光开关的最新进展。最后回顾了拓扑在非线性纳米光子学中的作用，并规划了该领域未来的潜在方向。
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