Nonlinear metasurfaces: a paradigm shift in nonlinear optics

By A. Krasnok, Mykhailo Tymchenko, Andrea Alù. 2017

522 citations recorded by the source corpus.

Frequency conversion processes, such as second- and third-harmonic generation, are commonly realized in nonlinear optics, offering opportunities for applications in photonics, chemistry, material science and biosensing. Given the inherently weak nonlinear response of natural materials, optically large samples and complex phase-matching techniques are typically required to realize significant nonlinear responses. To produce similar effects in much smaller volumes, current research has been devoted to the quest of synthesizing novel materials with enhanced optical nonlinearities at moderate input intensities. In particular, several approaches to engineer the nonlinear properties of artificial materials, metamaterials and metasurfaces have been introduced. Here, we review the current state of the art in the field of small-scale nonlinear optics, with special emphasis on high-harmonic generation from ultrathin metasurfaces based on plasmonic and high-index dielectric resonators, as well as semiconductor-loaded plasmonic metasurfaces. In this context, we also discuss recent advances in controlling the optical wavefront of generated nonlinear waves using metasurfaces. Finally, we compare viable approaches to enhance nonlinearities in ultrathin metasurfaces, and we offer an outlook on the future development of this exciting field of research.

View Paper: https://www.semanticscholar.org/paper/2a984a36742a5320ef53fc1ce1f71f4eb5fcfb74

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1. Fei Ding
2. Yuanqing Yang
3. Meng Kang
4. C. T. Chan
5. R. Deshpande
6. M. Xiao
7. Sergey I. Bozhevolnyi
8. Tao Liu

Citations in the corpus

• A review of gap-surface plasmon metasurfaces: fundamentals and applications (2018, background): “In addition to unprecedented applications relying on linear light-matter interaction, metasurfaces offer great capability of designing nonlinear photonic devices with remarkable performance, which is ascribed to the unique ability to localize EM fields at nanoscale volumes, together with significant”
• Applications of bound states in the continuum in photonics (2023, background): “Compared to their plasmonic counterparts 109,110 , high-index dielectric nano-structures have low material losses and provide both electric and magnetic field enhancement in bulk volumes 111 , leading to highly efficient nonlinear frequency conversion.”
• Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review (2019, methodology): “For a detailed and complete survey, we refer the reader to a well-known review paper on these topics.(16)”