Metaphotonics: An emerging field with opportunities and challenges

Baev, Alexander; Prasad, Paras N.; Ågren, Hans; Samoć, Marek; Wegener, Martin

doi:10.1016/j.physrep.2015.07.002

Cited by 84 publications

(57 citation statements)

References 465 publications

(372 reference statements)

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“…Major works have been done in design and fabrication to simultaneously address the efficiency and phase matching in nonlinear generation within the subwavelength regime, over the last decade. Metamaterials and their two-dimensional counterparts, metasurfaces [7][8][9][10][11][12][13][14][15][16] , are of great promise for an efficient nonlinear generation of new waves.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review

2019

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Freed from phase-matching constraints, plasmonic metasurfaces have contributed significantly to the control of the optical nonlinearity and enhancing the nonlinear generation efficiency by engineering subwavelength meta-atoms. However, the high dissipative losses and the inevitable thermal heating limit their applicability in nonlinear nanophotonics. All-dielectric metasurfaces, supporting both electric and magnetic Mie-type resonances in their nanostructures, have appeared as a promising alternative to nonlinear plasmonics. High-index dielectric nanostructures, allowing additional magnetic resonances, can induce magnetic nonlinear effects, which along with electric nonlinearities increase the nonlinear conversion efficiency. In addition, low dissipative losses and high damage thresholds provide an extra degree of freedom for operating at high pump intensities, resulting in a considerable enhancement of the nonlinear processes. In this review, we discuss the current state-of-the-art in the intensely developing area of all-dielectric nonlinear nanostructures and metasurfaces, including the role of Mie modes, Fano resonances and anapole moments for harmonic generation, wave mixing, and ultrafast optical switching. Furthermore, we review the recent progress in the nonlinear phase and wavefront control using all-dielectric metasurfaces. We discuss techniques to realize all-dielectric metasurfaces for multifunctional applications and generation of secondorder nonlinear processes from CMOS compatible materials.

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Section: Introductionmentioning

confidence: 99%

Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review

2019

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“…1,2,3 In most cases, the collective oscillations of free electrons subject to optical fields are conceptually analyzed within the Drude theory, 4 inherently using the local-response approximation (LRA). Within this picture, the material response occurs only at the spatial position of the perturbation, while there is not even the slightest response at any short range away.…”

Section: Introductionmentioning

confidence: 99%

On the origin of nonlocal damping in plasmonic monomers and dimers

Tserkezis

Yan

Hsieh

et al. 2017

Int. J. Mod. Phys. B

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The origin and importance of nonlocal damping is discussed through simulations with the generalized nonlocal optical response (GNOR) theory, in conjunction with timedependent density-functional-theory (TDDFT) calculations and equivalent circuit modeling, for some of the most typical plasmonic architectures: metal-dielectric interfaces, metal-dielectric-metal gaps, spherical nanoparticles, and nanoparticle dimers. It is shown that diffusive damping, as introduced by the convective-diffusive GNOR theory, describes well the enhanced losses and plasmon broadening predicted by ab initio calculations in few-nm particles or few-to-sub-nm gaps. Through the evaluation of a local effective dielectric function, it is shown that absorptive losses appear dominantly close to the metal surface, in agreement with TDDFT and the mechanism of Landau damping due to generation of electron-hole pairs near the interface. Diffusive nonlocal theories provide therefore an efficient means to tackle plasmon damping when electron tunneling can be safely disregarded, without the need to resort to more accurate, but time-consuming fully quantum-mechanical studies.

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“…Plasmonics lies among the most prominent research fields in modern nanotechnology123, promising exciting applications and unravelling new phenomena as the length scale reduces456. Traditionally, noble metals constitute the material basis for novel plasmonic devices operating in the visible7, although many recent efforts are devoted to extensions towards the ultraviolet, infrared and THz parts of the spectrum8.…”

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confidence: 99%

Robustness of the far-field response of nonlocal plasmonic ensembles

Tserkezis

Maack

Liu

et al. 2016

Sci Rep

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Contrary to classical predictions, the optical response of few-nm plasmonic particles depends on particle size due to effects such as nonlocality and electron spill-out. Ensembles of such nanoparticles are therefore expected to exhibit a nonclassical inhomogeneous spectral broadening due to size distribution. For a normal distribution of free-electron nanoparticles, and within the simple nonlocal hydrodynamic Drude model, both the nonlocal blueshift and the plasmon linewidth are shown to be considerably affected by ensemble averaging. Size-variance effects tend however to conceal nonlocality to a lesser extent when the homogeneous size-dependent broadening of individual nanoparticles is taken into account, either through a local size-dependent damping model or through the Generalized Nonlocal Optical Response theory. The role of ensemble averaging is further explored in realistic distributions of isolated or weakly-interacting noble-metal nanoparticles, as encountered in experiments, while an analytical expression to evaluate the importance of inhomogeneous broadening through measurable quantities is developed. Our findings are independent of the specific nonclassical theory used, thus providing important insight into a large range of experiments on nanoscale and quantum plasmonics.

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Metaphotonics: An emerging field with opportunities and challenges

Cited by 84 publications

References 465 publications

Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review

Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review

On the origin of nonlocal damping in plasmonic monomers and dimers

Robustness of the far-field response of nonlocal plasmonic ensembles

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