Reconfigurable curved metasurface for acoustic cloaking and illusion

Fan, Shi-Wang; Zhao, Shengdong; Cao, Liyun; Zhu, Yifan; Chen, A‐Li; Wang, Yanfeng; Donda, Krupali; Assouar, Badreddine

doi:10.1103/physrevb.101.024104

Cited by 105 publications

(47 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Active metasurfaces are not only confined to EM waves, but are also being developed for acoustic waves with numerous devices already been proved. [ 267–269 ] The impact of fully active metasurfaces has the potential to be groundbreaking and push technology as we know it to whole new levels.…”

Section: Discussion and Outlookmentioning

confidence: 99%

Tunable Metasurfaces: The Path to Fully Active Nanophotonics

Badloe

Lee

Seong

et al. 2021

Advanced Photonics Research

View full text Add to dashboard Cite

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.

show abstract

Section: Discussion and Outlookmentioning

confidence: 99%

Tunable Metasurfaces: The Path to Fully Active Nanophotonics

Badloe

Lee

Seong

et al. 2021

Advanced Photonics Research

View full text Add to dashboard Cite

show abstract

“…The design and optimization of metasurfaces for unconventional functionalities has led to several new optical meta-devices for control over propagation of electromagnetic (EM) waves at sub-wavelength scale [1][2][3][4][5] . The constituent nanostructures of a metasurface are typically meta-atoms and meta-molecules that are designed for various light modulation applications 6,7 .…”

Section: Moreover the Non-uniqueness Of Structural Designs And High mentioning

confidence: 99%

A cyclical deep learning based framework for simultaneous inverse and forward design of nanophotonic metasurfaces

Mall

Patil

Sethi

et al. 2020

Sci Rep

View full text Add to dashboard Cite

The conventional approach to nanophotonic metasurface design and optimization for a targeted electromagnetic response involves exploring large geometry and material spaces. This is a highly iterative process based on trial and error, which is computationally costly and time consuming. Moreover, the non-uniqueness of structural designs and high non-linearity between electromagnetic response and design makes this problem challenging. To model this unintuitive relationship between electromagnetic response and metasurface structural design as a probability distribution in the design space, we introduce a framework for inverse design of nanophotonic metasurfaces based on cyclical deep learning (DL). The proposed framework performs inverse design and optimization mechanism for the generation of meta-atoms and meta-molecules as metasurface units based on DL models and genetic algorithm. The framework includes consecutive DL models that emulate both numerical electromagnetic simulation and iterative processes of optimization, and generate optimized structural designs while simultaneously performing forward and inverse design tasks. A selection and evaluation of generated structural designs is performed by the genetic algorithm to construct a desired optical response and design space that mimics real world responses. Importantly, our cyclical generation framework also explores the space of new metasurface topologies. As an example application of the utility of our proposed architecture, we demonstrate the inverse design of gap-plasmon based half-wave plate metasurface for user-defined optical response. Our proposed technique can be easily generalized for designing nanophtonic metasurfaces for a wide range of targeted optical response.

show abstract

“…A variety of novel wave manipulation functionalities have since been realized, for example, wave beam steering and focusing, [ 2–4 ] perfect absorption or insulation, [ 5,6 ] acoustic/optical holograms [ 7 ] and carpet cloaking. [ 8 ] For elastic wave, metasurfaces offer new possibilities to a wide range of applications spanning from nondestructive evaluation, energy harvesting, [ 9 ] to acoustic tweezers for microparticle manipulation. [ 10 ]…”

Section: Introductionmentioning

confidence: 99%

Frequency‐Coded Passive Multifunctional Elastic Metasurfaces

Rong

Zhang

et al. 2020

Adv Funct Materials

View full text Add to dashboard Cite

As an emerging material, metasurfaces open the door to a wide range of applications based on ultrasonic and elastic waves. However, most of the existing elastic metasurfaces have a fixed functionality and operate at a fixed frequency, which make them difficult to adapt to changing working requirements and/or environments. Although several recently proposed reconfigurable designs can relax this limitation, they either need laborious tuning or complex active control systems. In this work, by encoding multiple functionalities onto a single metasurface through operation frequencies, passive metasurfaces with switchable multifunctionalities are proposed and realized. Different wave manipulation functions of a single metasurface can be switched from one to another simply by changing the operation frequency. The design of these metasurfaces is realized using a systematic design approach based on topology optimization. Frequency-coded multiple elastic wave manipulation functions, including wave beam steering and focusing, are numerically and experimentally demonstrated. Good agreement between the numerical simulations and experimental measurements is achieved. The proposed design strategy significantly enhances the functionalities and adaptivity of metasurfaces, moving them closer towards real-world applications.

show abstract

Reconfigurable curved metasurface for acoustic cloaking and illusion

Cited by 105 publications

References 45 publications

Tunable Metasurfaces: The Path to Fully Active Nanophotonics

Tunable Metasurfaces: The Path to Fully Active Nanophotonics

A cyclical deep learning based framework for simultaneous inverse and forward design of nanophotonic metasurfaces

Frequency‐Coded Passive Multifunctional Elastic Metasurfaces

Contact Info

Product

Resources

About