Liquid metasurface‐based periodically stacked radome design

Patel, Shobhit K.; Charola, Shreyas; Kosta, Y.P.; Rajdev, Foram

doi:10.1002/mop.31399

Cited by 7 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, metasurface have emerged as a promising OAM beam generator owing to its extraordinary capability of manipulating the wave front of reflected/transmitted EM waves [19][20][21][22][23][24][25][26][27][28][29]. It has been noticed that most of the OAM based metasurface generators in the literature were designed using periodic (uniformly spaced) arrangement of the unit cells (meta-atoms) of equal lattice constant in the xy-plane with (for instance) square or circular lattices.…”

Section: Introductionmentioning

confidence: 99%

Nature-inspired orbital angular momentum beam generator using aperiodic metasurface

Al-Nuaimi¹,

Hong²,

Whittow³

2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

This article presents the design of reflective nature-inspired metasurfaces for generation of wideband and high purity circularly polarized (CP) orbital angular momentum (OAM) waves. It has been shown in this article that the breaking of the transitional periodicity and the combination of aperiodic nature-inspired distribution of sub-wavelength sized meta-atoms based on Pancharatnam–Berry (PB) phase theory can lead to OAM beams of high purity with improved bandwidth. The distribution of the PB anisotropic meta-atoms across the proposed metasurface aperture is non-uniform and distributed along logarithmic spirals similar to sunflower seeds, i.e. outwardly logarithmic spiral lattices of no transitional periodicity. The proposed reflective CP-OAM beam generator metasurface diameter is 140 mm, thickness ≈ 0.11λ 17GHz and has 600 anisotropic spatially rotated PB meta-atoms of sub-wavelength size of 5 mm ≈ 0.28λ 17GHz. Four OAM metasurface generators have been designed to produce OAM waves of various modes from 1 to 4. Both simulation and experimental results have demonstrated that the proposed metasurfaces can efficiently generate CP-OAM beams from 13.1 GHz to 20.5 GHz (BW = 44%) with high mode purity >90%.

show abstract

Section: Introductionmentioning

confidence: 99%

Nature-inspired orbital angular momentum beam generator using aperiodic metasurface

Al-Nuaimi¹,

Hong²,

Whittow³

2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

show abstract

“…Different strategies and methods have been adopted for the dynamic generation and reconfiguration of BBs at a fixed frequency, using distinct approaches already used for various purposes including liquid materials, metamaterials, and metasurfaces (see, e.g. [21][22][23][24]). In the optical regime, BBs with dynamic tunability have been achieved by means of moving axicons [25][26][27], electrically controlled liquid mirrors [28], or phase-only spatial light modulators [29]; in the microwave range, electronically controlled active metasurfaces have been employed [30].…”

Section: Introductionmentioning

confidence: 99%

Spiral antennas for the generation of bessel beams with tunable nondiffractive range

Benedetti¹,

Fuscaldo²,

Comite³

et al. 2021

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

Backward cylindrical leaky waves radiating in the direction of their central axis represent an efficient solution for generating nondiffracting Bessel-like beams. The structures proposed so far to support such waves, constituted by concentric metal rings printed on a grounded dielectric slab, ensure the formation of nondiffractive field patterns with preset unchangeable configurations at a given frequency. Here, we propose the adoption of subwavelength spiral filaments with controlled patterning of the envelope figure by dynamic mechanical deformations, in order to achieve spatial tuning of the nondiffractive region in its size and shape. Precise guidelines and examples are provided to describe the proposed design technique and underline the inherent advantages of this alternative technological solution.

show abstract

Broadband graphene‐based metasurface solar absorber

Charola

Patel

Parmar

et al. 2019

Micro & Optical Tech Letters

View full text Add to dashboard Cite

We presented broadband solar absorber using graphene‐based pyramid‐shaped metasurface structure. The proposed design is analyzed for its absorption characteristics from 100 THz to 1000 THz frequency range (infrared, visible, and ultraviolet region) in term of geometrical parameters of the design. Results in term of reflectance and absorption are presented for pyramidal metasurface design and rectangular metasurface design. The results indicate that the absorption of proposed pyramid graphene‐based metasurface design is over 67.4% for 100 to 430 THz across the infrared region, 87.3% for 431 to 770 THz across the visible region and 89.3% for 770 to 1000 THz across the ultraviolet region. The proposed design provides broadband absorption response which is applicable in energy harvesting and electromagnetic shielding applications.

show abstract

Liquid metasurface‐based periodically stacked radome design

Cited by 7 publications

References 19 publications

Nature-inspired orbital angular momentum beam generator using aperiodic metasurface

Nature-inspired orbital angular momentum beam generator using aperiodic metasurface

Spiral antennas for the generation of bessel beams with tunable nondiffractive range

Broadband graphene‐based metasurface solar absorber

Contact Info

Product

Resources

About