Voltage-Tunable Artificial Gradient-Index Lens Based on a Liquid Crystal Loaded Fishnet Metamaterial

Maasch, Matthias; Roig, María; Damm, Christian; Jakoby, Rolf

doi:10.1109/lawp.2014.2345841

Cited by 31 publications

(18 citation statements)

References 17 publications

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“…[111] A fishnet metamaterial loaded with nematic LCs has been demonstrated as a voltage-tunable gradientindex lens in the microwave regime. [112] Following a similar approach with graphene as the locally tunable material, anomalous wave deflection has been shown in reflection [113] and transmission [114] modes. Devices for beam steering or lensing based on magnetic materials have been also proposed, provided that a spatial profiling is imparted by spatially modulating the external magnetic field.…”

Section: Local Tunability At the Unit-cell Levelmentioning

confidence: 99%

Toward Intelligent Metasurfaces: The Progress from Globally Tunable Metasurfaces to Software‐Defined Metasurfaces with an Embedded Network of Controllers

Tsilipakos

Tasolamprou

Pitilakis

et al. 2020

Advanced Optical Materials

190

110

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Metasurfaces, the ultrathin, 2D version of metamaterials, have recently attracted a surge of attention for their capability to manipulate electromagnetic waves. Recent advances in reconfigurable and programmable metasurfaces have greatly extended their scope and reach into practical applications. Such functional sheet materials can have enormous impact on imaging, communication, and sensing applications, serving as artificial skins that shape electromagnetic fields. Motivated by these opportunities, this progress report provides a review of the recent advances in tunable and reconfigurable metasurfaces, highlighting the current challenges and outlining directions for future research. To better trace the historical evolution of tunable metasurfaces, a classification into globally and locally tunable metasurfaces is first provided along with the different physical addressing mechanisms utilized. Subsequently, coding metasurfaces, a particular class of locally tunable metasurfaces in which each unit cell can acquire discrete response states, is surveyed, since it is naturally suited to programmatic control. Finally, a new research direction of software‐defined metasurfaces is described, which attempts to push metasurfaces toward unprecedented levels of functionality by harnessing the opportunities offered by their software interface as well as their inter‐ and intranetwork connectivity and establish them in real‐world applications.

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Section: Local Tunability At the Unit-cell Levelmentioning

confidence: 99%

Toward Intelligent Metasurfaces: The Progress from Globally Tunable Metasurfaces to Software‐Defined Metasurfaces with an Embedded Network of Controllers

Tsilipakos

Tasolamprou

Pitilakis

et al. 2020

Advanced Optical Materials

190

110

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“…A resonance shift of 9.91 GHz to 9.55 GHz with a response time of 300 ms was reported by changing the orientation of the nematic crystals with voltage from 0 to 100 V applied to the LC background metamaterial [76]. Despite the relatively slow response speed, the effective tuning of LC background metamaterial has promising applications for wavefront manipulation such as tunable gradient indexed lenses [77,78].…”

Section: Metamaterials In Lcmentioning

confidence: 99%

Metafluidic metamaterial: a review

Song

Zhu

et al. 2018

Advances in Physics: X

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Metafluidic metamaterial is a metamaterial the optical response of which is dependent on fluid contributed metamolecules. The dependence originates either from a fluid background coupling to the metamolecule or from the resonance in a liquid structured metamolecule. Different liquid materials including water, liquid crystal, and liquid metals are applied to realize the metafluidic metamaterial. Sophisticated technologies like electric bias and microfluidic system have been used for active control of metafluidic metamaterials which provide a new platform for electromagnetic wave manipulation and metadevice realization. The liquid background and significant tunability of the metafluidic metamaterial promise numerous applications, such as material sensing, bio-detection, energy harvesting, and imaging, just to name a few.

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“…LC has been incorporated into a great deal of electromagnetic devices including phase shifter [31,32], reconfigurable antennas [33,34], and metasurface [35,36] to date.…”

Section: Introductionmentioning

confidence: 99%

Multifunctional Reflective Digital Metasurfaces of Arbitrary Base Based on Liquid Crystal Technology

Zhao¹,

Qing²

2020

Preprint

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This paper presents a multifunctional reflective digital metasurface of arbitrary base based on voltage tunable liquid crystal (LC). The reflective digital metamaterial can be multiplexed for different desirable functions by properly biasing the LC for different code patterns. Simulation results of three significant functions, beam steering with a steering elevation angle 27° at 75 GHz, RCS reduction of at least 15dB along the incident direction, and beam shaping with different beam shapes have been presented to prove the concept.

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Voltage-Tunable Artificial Gradient-Index Lens Based on a Liquid Crystal Loaded Fishnet Metamaterial

Cited by 31 publications

References 17 publications

Toward Intelligent Metasurfaces: The Progress from Globally Tunable Metasurfaces to Software‐Defined Metasurfaces with an Embedded Network of Controllers

Toward Intelligent Metasurfaces: The Progress from Globally Tunable Metasurfaces to Software‐Defined Metasurfaces with an Embedded Network of Controllers

Metafluidic metamaterial: a review

Multifunctional Reflective Digital Metasurfaces of Arbitrary Base Based on Liquid Crystal Technology

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