Functional meta-optics and nanophotonics govern by Mie resonances

Abstract: Scattering of electromagnetic waves by subwavelength objects is accompanied by the excitation of electric and magnetic Mie resonances, that may modify substantially the scattering intensity and radiation pattern. Scattered fields can be decomposed into electric and magnetic multipoles, and the magnetic multipoles define magnetic response of structured materials underpinning the new field of all-dielectric resonant meta-optics. Here we review the recent developments in meta-optics and nanophotonics, and demonstrate that the Mie resonances can play a crucial role offering novel ways for the enhancement of many optical effects near magnetic and electric multipolar resonances, as well as driving a variety of interference phenomena which govern recently discovered novel effects in nanophotonics. We further discuss the frontiers of all-dielectric meta-optics for flexible and advanced control of light with full phase and amplitude engineering, including nonlinear nanophotonics, anapole nanolasers, quantum tomography, and topological photonics.

• The paper presents a comprehensive review detailing how electric and magnetic Mie resonances reshape electromagnetic scattering in nanophotonics.
• It demonstrates that all-dielectric meta-atoms can outperform plasmonic systems, notably enhancing nonlinear effects like third-harmonic generation.
• The study highlights interference phenomena such as Kerker’s effect and Fano resonances to achieve robust and tunable optical device performance.

An Analytical Perspective on "Functional Meta-optics and Nanophotonics Govern by Mie Resonances"

The paper by Sergey Kruk and Yuri Kivshar offers a comprehensive review of advancements in the domain of meta-optics, pivoting on the profound utility of electric and magnetic Mie resonances in nanophotonic applications. At a fundamental level, it underscores the transformation of electromagnetic scattering scenarios through these resonances, particularly highlighting their role in modifying scattering intensity and patterns.

Significance of Mie Resonances

Central to the discussed narrative are the phenomena of electric and magnetic multipoles which emerge from subwavelength scatterers. Advocating for the field of all-dielectric resonant meta-optics, the authors accentuate how structured dielectric materials can achieve significant magnetic responses, a feat conventionally unavailable in natural materials at optical frequencies. Herein lies the advantage: utilizing artificial subwavelength constructs, or meta-atoms, that foster phenomena akin to optical magnetism. Such configurations facilitate the engineering of magnetic permeability (μ) and subsequently amplify a variety of optical effects.

Interaction Mechanisms and Material Innovation

The authors stress how the exceptional light-localization capability of high-index dielectric nanoparticles, characterized by resonant Mie phenomena, can outperform traditional plasmonic systems due to minimized energetic losses. These dielectric structures manifest both electric and magnetic dipole resonances, fostering impactful nonlinear effects such as Raman scattering and harmonic generation, as seen in the enhancement of third-harmonic generation (THG) and the associated nonlinear optics paradigms.

Interference and Multimodal Phenomena

Interference among various multipole modes, including the innovative employment of anapole states and anti-ferromagnetic (AFM) configurations, showcases how advanced photonics can capitalize on structured interferences to achieve novel optical properties. Kerker’s effect and the ability to control scattering directionality are remarkable points of interest. Moreover, the paper explores Fano resonances, rooted in the interplay of magnetic and electric dipoles, which can pivotally direct multipole interactions leading to superior field confinement and angular dependencies of emitted radiation.

Advancing Meta-optical Capabilities

The exploration of planar meta-optics introduces elements like Huygens' metasurfaces designed for superior wavefront control through careful engineering of phase and amplitude responses. By manipulating form birefringence and geometric phases, these systems can yield metasurfaces that combine high efficiency with transparency akin to standard optical elements, yet with significantly diminished volumetric constraints.

Future Implications and Technologies

The research posits a promising outlook for meta-optics, envisioning advancements such as tunable metasurfaces, quantum metrology for photon state detection, and topological photonics that introduce photonic topological insulators optimized for robust light propagation immune to scattering imperfections. Quantum photonics coupled with metasurfaces may pioneer efficient quantum communication systems, while dynamically reconfigurable devices hold potential for novel applications in telecommunications and data processing.

Conclusion

The paper contributes significantly to the understanding of how Mie resonances can drive the flexible control of light through nanophotonic structures, offering a path forward for enhancing various optical phenomena. With its comprehensive discourse, the paper not only critically evaluates the current state of all-dielectric meta-optics but also envisages the trajectory for future exploratory directions in resonant photonics. The content rightfully positions Mie resonances as a keystone in the fabrication of advanced optical devices, and presents a lucid depiction of the evolving landscape in photonic meta-device applications.