Backward Phase-Matched Second-Harmonic Generation from Stacked Metasurfaces

Stolt, Timo; Kim, Jeonghyun; Héron, Sébastien; Vesala, Anna; Yang, Younghwan; Mun, Jungho; Kim, Minkyung; Huttunen, Mikko J.; Czaplicki, Robert; Kauranen, Martti; Rho, Junsuk; Genevet, Patrice

doi:10.1103/physrevlett.126.033901

Cited by 42 publications

(32 citation statements)

References 46 publications

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“…Propagation phase has been investigated by exploiting an effective refractive index to manipulate the retardation phase by changing the volume ratio, aspect ratio, and height of meta-atoms. 10,11 Resonant effects such as plasmonic resonance, [12][13][14][15] Mie resonance, 16,17 and Fabry-Pérot resonance 18,19 have also been exploited. By exploiting these resources, optical elements can be highly miniaturized and various optical applications have been implemented, such as beam splitters, [20][21][22] absorbers, [23][24][25][26][27][28][29] metalenses, 30,31 metaholograms, [32][33][34][35][36][37][38][39][40] selective thermal emitters, [41][42][43] detecting devices, [44][45][46] and structural color.…”

Section: Introductionmentioning

confidence: 99%

Tunable metasurfaces towards versatile metalenses and metaholograms: a review

et al. 2022

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Metasurfaces have attracted great attention due to their ability to manipulate the phase, amplitude, and polarization of light in a compact form. Tunable metasurfaces have been investigated recently through the integration with mechanically moving components and electrically tunable elements. Two interesting applications, in particular, are to vary the focal point of metalenses and to switch between holographic images. We present the recent progress on tunable metasurfaces focused on metalenses and metaholograms, including the basic working principles, advantages, and disadvantages of each working mechanism. We classify the tunable stimuli based on the light source and electrical bias, as well as others such as thermal and mechanical modulation. We conclude by summarizing the recent progress of metalenses and metaholograms, and providing our perspectives for the further development of tunable metasurfaces.

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Section: Introductionmentioning

confidence: 99%

Tunable metasurfaces towards versatile metalenses and metaholograms: a review

et al. 2022

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“…Furthermore, artificial chiral nanostructures can be utilized in various photonic applications such as chiral metamirrors, 81 metaholograms, 82–86 metalenses, 87,88 multi-mode OAM generators, 89 beam steering, 90 and color prints. 91 These applications can be further improved by analysis of current metasurface and metamaterials that use various optical responses such as Mie-resonance, 92–96 geometric phases, 97,98 nanogap plasmonics, 99,100 nonlinear optics, 101 Bragg-reflection, 102,103 and spin Hall effect. 104–108 Future research could also focus on how tuneable chirality and controllable chiroptical properties can be produced so that the chiral structure is not fixed and the degrees of freedom can be increased.…”

Section: Discussionmentioning

confidence: 99%

Three-dimensional artificial chirality towards low-cost and ultra-sensitive enantioselective sensing

Kim

Yang

et al. 2022

Nanoscale

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“…We direct the reader to numerous reviews and book chapters dedicated to nonlinear effects in metasurfaces that can give a deeper insight into the fundamentals and mechanisms in nonlinear metasurfaces. [ 241–245 ] New mechanisms such as SHG in the backward direction using phase‐matched stacked metasurfaces that extend the 2D metasurfaces into 2.5D [ 246 ] and the spin–orbit angular momentum interaction of light [ 247 ] have been reported. By designing the metasurface to produce both SHG and THG with comparable amplitudes, nonlinear bicolor holography using a single laser source has also been introduced.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Tunable Metasurfaces: The Path to Fully Active Nanophotonics

Badloe

Lee

Seong

et al. 2021

Advanced Photonics Research

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In the field of nanophotonics, metasurfaces have come to the forefront in real‐world applications, owing to their accessible exotic optical properties that can be readily designed and fabricated using currently available techniques. The subwavelength dimensions and lightweight characteristics of metasurfaces are attractive qualities for the miniaturization of optical devices and are already exploited in devices that can rival, and sometimes even outperform, conventional bulky optics. Over the past decade, ample research has been undertaken to produce high‐performance metasurfaces with exciting optical properties that cannot be found in nature or achieved with conventional optics. To open the path to widely used devices in our everyday lives, the next obvious step for metasurfaces is the development of tunability. Herein, the techniques and development of applications of tunable metasurfaces are presented through the incorporation of active materials and controllable external stimuli, and the uncovered tunable characteristics are critically analyzed. The review rounds up by proposing the future directions and prospects for actively tunable metasurfaces and their potential practical applications.

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Backward Phase-Matched Second-Harmonic Generation from Stacked Metasurfaces

Cited by 42 publications

References 46 publications

Tunable metasurfaces towards versatile metalenses and metaholograms: a review

Tunable metasurfaces towards versatile metalenses and metaholograms: a review

Three-dimensional artificial chirality towards low-cost and ultra-sensitive enantioselective sensing

Tunable Metasurfaces: The Path to Fully Active Nanophotonics

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