Maximized Frequency Doubling through the Inverse Design of Nonlinear Metamaterials

Raju, Lakshmi; Lee, Kyu‐Tae; Liu, Zhaocheng; Zhu, Dayu; Zhu, Muliang; Poutrina, Ekaterina; Urbas, Augustine; Cai, Wenshan

doi:10.1021/acsnano.1c09298

Cited by 20 publications

(8 citation statements)

References 35 publications

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“…2019; Raju et al. 2022). Indeed, in our tests this behaviour can be observed even for very small amplitude incident waves (i.e.…”

Section: Discussionmentioning

confidence: 99%

Attenuating surface gravity waves with an array of submerged resonators: an experimental study

Lorenzo,

Pezzutto,

De Lillo

et al. 2023

J. Fluid Mech.

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We report on an experimental study of a device comprising an array of submerged, inverted and periodic cylindrical pendula (resonators), whose objective is the attenuation of surface gravity waves. The idea is inspired by the concept of metamaterials, i.e. engineered structures designed to interact with waves and manipulate their propagation properties. The study is performed in a wave flume where waves are excited in a wide range of frequencies. We explore various configurations of the device, calculating the transmitted, reflected and dissipated energy of the waves. If the incoming wave frequencies are sufficiently close to the natural frequency of the pendula, we find a considerable wave attenuation effect. This behaviour is enhanced by the number of resonators in the array. Moreover, the device is also capable of reflecting the energy of selected frequencies of the incoming waves. These frequencies, predicted by a generalized Bragg scattering mechanism, depend on the spacing between the resonators. The presented results show promise for the development of an environmentally sustainable device for mitigating waves in coastal zones.

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“…2019; Raju et al. 2022). Indeed, in our tests this behaviour can be observed even for very small amplitude incident waves (i.e.…”

Section: Discussionmentioning

confidence: 99%

Attenuating surface gravity waves with an array of submerged resonators: an experimental study

Lorenzo,

Pezzutto,

De Lillo

et al. 2023

J. Fluid Mech.

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“…The general framework for this work, focused on SFG, requires a pattern generation network and simulator network 4 . Given the SFG nonlinear metamaterial parameters, utilizing a pattern generator and simulator, we can find an optimal plasmonic geometry for the device to maximize the sum-frequency generation.…”

Section: Sfg Nonlinear Metamaterials Parametersmentioning

confidence: 99%

Photonic upconversion maximization for nonlinear meta-material enabled by deep learning

Raju

Liu

Zhu

et al. 2023

Nonlinear Frequency Generation and Conversion: Materials and Devices XXII

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Photonic upconversion from the infrared regime to the visible spectrum can occur through sum-frequency generation (SFG). A second-order nonlinear optical response, such as SFG, can be produced from a nonlinear material, in this case an ABC nanolaminate. Optimization of a metamaterial consisting of a plasmonic nanolaminate device can maximize the SFG from incident wavelengths. Utilization of a deep learning framework removes the need for traditional guess and check methods and creates new possibilities for plasmonic geometries. Applications of this research include low-cost night vision or low light imaging systems for defense, autonomous vehicles, and other commercial uses.

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“…[ 21,22 ] Generally, such resonances are accompanied by enhancement of local electric or magnetic fields, leading to enhanced nonlinear responses such as second harmonic generation (SHG) and third harmonic generation (THG). [ 23–25 ] Although the overall nonlinear efficiency of the reported metasurfaces is still not comparable to that in conventional nonlinear crystals, the nonlinear efficiency of metasurfaces is much higher when considering their planar nature. Most importantly, metasurfaces provide an efficient platform for optical frequency mixing and high harmonic generation.…”

Section: Introductionmentioning

confidence: 99%

Linear and Nonlinear Optical Field Manipulations with Multifunctional Chiral Coding Metasurfaces

Jiang

Liu

et al. 2023

Advanced Optical Materials

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the chiral light-matter interactions include two distinct phenomena: circular dichroism characterized by the absorption difference between transmitted left circularly polarized (LCP) and right circularly polarized (RCP) lights [4] and circular birefringence caused by phase accumulation difference between LCP and RCP lights. [5] Recently, chirality induced by artificial nanostructures and their 3D arraysmetamaterials has drawn much attention in the scientific community due to the arbitrary symmetric design and abundant optical resonance engineering of nanostructures. Such effects enable significant polarizability tensor manipulation of the optical fields with high degree of freedom (DOF). [6] Based on different local chiral electromagnetic resonances of the nanostructures, researchers have developed numerous functional chiral designs such as chiral biosensing, [7] chiral bound states in the continuum, [8] Janus plasmonic helical nanoapertures, [9] and weak chirality for strong coupling between resonant states. [10] In the past decade, metasurfaces as planar counterparts of metamaterials have been extensively investigated due to their exotic electromagnetic properties for efficient scattering control of the electromagnetic waves. [11][12][13][14][15] In contrast to conventional optics, metasurfaces consist of arrays of subwavelength elements ("meta-atoms") that can locally manipulate light−matter interactions. Spatially varying meta-atoms allow the control of the polarization, phase, and amplitude of light, leading to high DOF to manipulate the electromagnetic waves from near-fields to far-fields. [16,17] The light−matter interactions supported by the meta-atoms include local multi-polar resonances [18,19] and near-field coupling resonances such as Fano resonances [20] and bound states in the continuum. [21,22] Generally, such resonances are accompanied by enhancement of local electric or magnetic fields, leading to enhanced nonlinear responses such as second harmonic generation (SHG) and third harmonic generation (THG). [23][24][25] Although the overall nonlinear efficiency of the reported metasurfaces is still not comparable to that in conventional nonlinear crystals, the nonlinear efficiency of metasurfaces is much higher when considering their planar nature. Most importantly, metasurfaces provide an efficient platform for optical frequency mixing and high harmonic generation. [26][27][28] On the other hand, based on a variety of local resonances of meta-atoms, metasurfaces can be designed to carry different Optical chirality, which describes the property of asymmetric light-matter interactions for different handedness of polarization, plays an important role in physical photonics, biochemical processes, and molecular recognition. Recently, asymmetric optical responses of chiral nanostructures provide a wide platform for arbitrary and artificial manipulation of optical chirality. Here, a design strategy is theoretically and experimentally introduced to realize a spin-selective coding metasurface in both linear a...

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Maximized Frequency Doubling through the Inverse Design of Nonlinear Metamaterials

Cited by 20 publications

References 35 publications

Attenuating surface gravity waves with an array of submerged resonators: an experimental study

Attenuating surface gravity waves with an array of submerged resonators: an experimental study

Photonic upconversion maximization for nonlinear meta-material enabled by deep learning

Linear and Nonlinear Optical Field Manipulations with Multifunctional Chiral Coding Metasurfaces

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