Soft optical metamaterials

Chen, Yixin; Ai, Bin; Wong, Zi Jing

doi:10.1186/s40580-020-00226-7

Cited by 70 publications

(55 citation statements)

References 149 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the realization of flexible (or soft) metasurface becomes one of the emerging topics nowadays. Soft Metasurfaces are normally being fabricated with metal, metal-dielectric structures, or only dielectric materials deposited over a flexible substrate [12,22,69], which are now considered to be the competitive platform for controlling the optical properties of the output light with mechanical force [20]. Meta-structures recently are being developed over flexible polymer [66], 2D materials [61,99], or carbon nanofilms [138].…”

Section: A Trend: From Slab Metasurface To Flexible Metasurfacementioning

confidence: 99%

A Review on Metasurface: From Principle to Smart Metadevices

et al. 2021

View full text Add to dashboard Cite

Metamaterials are composed of periodic subwavelength metallic/dielectric structures that resonantly couple to the electric and magnetic fields of the incident electromagnetic waves, exhibiting unprecedented properties which are most typical within the context of the electromagnetic domain. However, the practical application of metamaterials is found challenging due to the high losses, strong dispersion associated with the resonant responses, and the difficulty in the fabrication of nanoscale 3D structures. The optical metasurface is termed as 2D metamaterials that inherent all of the properties of metamaterials and also provide a solution to the limitation of the conventional metamaterials. Over the past few years, metasurfaces; have been employed for the design and fabrication of optical elements and systems with abilities that surpass the performance of conventional diffractive optical elements. Metasurfaces can be fabricated using standard lithography and nanoimprinting methods, which is easier campared to the fabrication of the counterpart 3 days metamaterials. In this review article, the progress of the research on metasurfaces is illustrated. Concepts of anomalous reflection and refraction, applications of metasurfaces with the Pancharatanm-Berry Phase, and Huygens metasurface are discussed. The development of soft metasurface opens up a new dimension of application zone in conformal or wearable photonics. The progress of soft metasurface has also been discussed in this review. Meta-devices that are being developed with the principle of the shaping of wavefronts are elucidated in this review. Furthermore, it has been established that properties of novel optical metasurface can be modulated by the change in mechanical, electrical, or optical stimuli which leads to the development of dynamic metasurface. Research thrusts over the area of tunable metasurface has been reviewed in this article. Over the recent year, it has been found that optical fibers and metasurface are coagulated for the development of optical devices with the advantages of both domains. The metasurface with lab-on fiber-based devices is being discussed in this review paper. Finally, research trends, challenges, and future scope of the work are summarized in the conclusion part of the article.‬‬‬‬‬‬‬

show abstract

Section: A Trend: From Slab Metasurface To Flexible Metasurfacementioning

confidence: 99%

A Review on Metasurface: From Principle to Smart Metadevices

et al. 2021

View full text Add to dashboard Cite

show abstract

“…[ 175 ] For in depth reviews focused on mechanically tunable photonics and soft metamaterials, please see these article. [ 176,177 ] Another option for mechanically altering metasurfaces is through the use of the microelectromechanical system (MEMS) technology but is generally limited in the THz and IR regions. We will not cover MEMS here, so for some comprehensive reviews of tunable metasurfaces and metamaterials using MEMS, please see these references.…”

Section: Continuously Tunable Metasurfacesmentioning

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

“…On the other hand, soft materials such as polymers, colloidal dispersions, fluids, and liquid crystals offer immense scope in terms of processability and tunability. 24 Among soft materials, liquid crystals (LCs) are preferred as materials of choice to bring about tunability in metaproperties [25][26][27] due to their responsiveness to a wide range of stimuli, viz., thermal, mechanical, electrical, magnetic, and optical fields. 28,29 Liquid crystal-nanoparticle hybrid systems are interesting materials to be used for this purpose.…”

Section: Introductionmentioning

confidence: 99%