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   Articles with "cloak" as a keyword



Multiband Omnidirectional Invisibility Cloak

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recommendations! Published in 2024 at "Advanced Science"

DOI: 10.1002/advs.202401295

Abstract: Transformation optics (TO) provides a powerful tool to manipulate electromagnetic waves, enabling the design of invisibility cloaks, which can render objects invisible. Despite many years of research, however, invisibility cloaks experimentally realized thus far can… read more here.

Keywords: invisibility cloak; invisibility cloaks; invisibility; cloak ... See more keywords

Thermal cloak with adaptive heat source to proactively manipulate temperature field in heat conduction process

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recommendations! Published in 2018 at "International Journal of Heat and Mass Transfer"

DOI: 10.1016/j.ijheatmasstransfer.2018.07.035

Abstract: Abstract Thermal cloaks can thermally hide an object without disturbing background thermal field. The coordinate transformation method for designing conventional thermal cloaks face some challenges that the physical properties of metamaterials are required to be… read more here.

Keywords: cloak; field; heat source; heat ... See more keywords

Nonlinear transformation-based broadband cloaking for flexural waves in elastic thin plates

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recommendations! Published in 2019 at "Journal of Sound and Vibration"

DOI: 10.1016/j.jsv.2018.12.025

Abstract: Abstract Controlling and guiding elastic waves in solids is more complicated compared with electromagnetic and acoustic waves; design and fabrication of an elastic wave cloak with non-singular, homogeneous, and isotropic material parameters is a challenging… read more here.

Keywords: flexural waves; nonlinear transformation; waves elastic; cloak ... See more keywords

Influences of imperfectness and inner constraints on an acoustic cloak with unideal pentamode materials

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recommendations! Published in 2019 at "Journal of Sound and Vibration"

DOI: 10.1016/j.jsv.2019.06.005

Abstract: Abstract Pentamode materials are elastic solids with vanishing shear modulus, and can be used to cloak underwater sound with solid state and broadband advantages. However, pentamode materials produced with microstructures have inevitable small shear modulus.… read more here.

Keywords: constraints acoustic; pentamode materials; cloak; acoustic cloak ... See more keywords

Infrared Invisibility Cloak Based on Polyurethane-Tin Oxide Composite Microtubes.

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recommendations! Published in 2019 at "ACS applied materials & interfaces"

DOI: 10.1021/acsami.8b22535

Abstract: An invisibility cloak based on visible rays with a refractive index similar to that of air can effectively conceal people or objects from human eyes. However, even if an invisibility cloak based on visible rays… read more here.

Keywords: invisibility cloak; cloak based; thermal radiation; cloak ... See more keywords
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Metasurface Approach to External Cloak and Designer Cavities

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recommendations! Published in 2018 at "ACS Photonics"

DOI: 10.1021/acsphotonics.7b01362

Abstract: A metasurface, with only a single layer of artificial atoms for ease of fabrication, can become a practical surface-equivalent route to transformation optical (TO) applications. The previous design paradigm for a metasurface carpet cloak is… read more here.

Keywords: approach external; cloak; external cloak; cloak designer ... See more keywords

Controlling frequency dispersion in electromagnetic invisibility cloaks

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recommendations! Published in 2019 at "Scientific Reports"

DOI: 10.1038/s41598-019-42481-7

Abstract: Electromagnetic cloaking, as challenging as it may be to the physicist and the engineer has become a topical subject over the past decade. Thanks to the transformations optics (TO) invisibility devices are in sight even… read more here.

Keywords: frequency dispersion; cloak; frequency; spherical cloak ... See more keywords

Large-scale underwater acoustic cloak based on honeycomb lattice pentamode metamaterials

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recommendations! Published in 2025 at "Scientific Reports"

DOI: 10.1038/s41598-025-11501-0

Abstract: This research explores the development and modeling of an underwater acoustic cloak utilizing pentamode metamaterials. The primary objective is to design a structure that acoustically mimics water, enabling the guidance of waves in such a… read more here.

Keywords: underwater acoustic; acoustic cloak; honeycomb lattice; structure ... See more keywords

Transmissive invisibility cloak using phase gradient metasurfaces

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recommendations! Published in 2024 at "Physica Scripta"

DOI: 10.1088/1402-4896/ad5c0e

Abstract: Different from the reflective approach of the carpet cloak designed to conceal surface irregularities on highly reflective surfaces, the transmission invisibility cloak, often capable of achieving perfect invisibility, operates within a transmission geometry. In this… read more here.

Keywords: invisibility cloak; phase gradient; invisibility; transmissive invisibility ... See more keywords

Broadband cross circularly polarized carpet invisibility cloak based on Pancharatnam–Berry phase reflective metasurface

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recommendations! Published in 2023 at "Laser Physics Letters"

DOI: 10.1088/1612-202x/acd7e1

Abstract: We present a broadband circularly polarized reflective metasurface carpet cloak. The metasurface unit cell is composed of two crossed H-shaped metal patterns. When the incident wave is left-handed circularly polarization (LCP), the metasurface can achieve… read more here.

Keywords: reflective metasurface; cross; cloak; carpet ... See more keywords

CLOAK: A Stream Cipher Based Encryption Protocol for Mobile Cloud Computing

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recommendations! Published in 2017 at "IEEE Access"

DOI: 10.1109/access.2017.2744670

Abstract: Mobile device and its applications have revolutionized the way we store and share data. It is becoming a warehouse of users personal information. Unluckily, most of these data are stored in an unencrypted format, prone… read more here.

Keywords: protocol; encryption; stream cipher; cloak ... See more keywords