Search Results - "Chu, Hongchen"
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1
Invisible surfaces enabled by the coalescence of anti-reflection and wavefront controllability in ultrathin metasurfaces
Published in Nature communications (26-07-2021)“…Reflection inherently occurs on the interfaces between different media. In order to perfectly manipulate waves on the interfaces, integration of antireflection…”
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2
Ultra-broadband reflectionless Brewster absorber protected by reciprocity
Published in Light, science & applications (23-04-2021)“…The Brewster’s law predicts zero reflection of p-polarization on a dielectric surface at a particular angle. However, when loss is introduced into the…”
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3
Hyperuniform disordered distribution metasurface for scattering reduction
Published in Applied physics letters (08-03-2021)“…Metasurfaces with spatially varying reflection phases have promised great possibilities in realizing diffusion-like backward scattering. However, most studies…”
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4
A hybrid invisibility cloak based on integration of transparent metasurfaces and zero-index materials
Published in Light, science & applications (15-08-2018)“…The invisibility cloak, a long-standing fantastic dream for humans, has become more tangible with the development of metamaterials. Recently, metasurface-based…”
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Realization of broadband coherent perfect absorption of spoof surface plasmon polaritons
Published in Applied physics letters (25-04-2022)“…In this work, we propose and demonstrate a scheme to realize broadband coherent perfect absorption of spoof surface plasmon polaritons (SPPs) using an…”
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6
Modified Luneburg Lens for Achromatic Subdiffraction Focusing and Directional Emission
Published in IEEE transactions on antennas and propagation (01-11-2021)“…Broadband achromatic subdiffraction focusing is in urgent need in application of imaging. However, the previously published broadband achromatic metalenses are…”
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Ultracompact Photonic Circuits without Cladding Layers
Published in Physical review. X (01-03-2022)“…Cladding layers of waveguides prevent interchannel interference yet are unfavorable for the integration of photonic circuits. Here, we report the realization…”
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Dewdrop Metasurfaces and Dynamic Control Based on Condensation and Evaporation
Published in Advanced science (01-10-2024)“…Dewdrops, the droplets of water naturally occurring on leaves and carapaces of insects, are a fascinating phenomenon in nature. Here, a man‐made array of…”
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9
A deep neural network for general scattering matrix
Published in Nanophotonics (Berlin, Germany) (27-06-2023)“…The scattering matrix is the mathematical representation of the scattering characteristics of any scatterer. Nevertheless, except for scatterers with high…”
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10
Pseudo‐Hermitian Systems Constructed by Transformation Optics with Robustly Balanced Loss and Gain
Published in Advanced photonics research (01-02-2021)“…Non‐Hermitian systems with parity‐time symmetry are found to exhibit real spectra of eigenvalues, indicating a balance between the loss and gain. However, such…”
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11
Crosstalk prohibition at the deep-subwavelength scale by epsilon-near-zero claddings
Published in Nanophotonics (Berlin, Germany) (18-05-2023)“…To prevent the crosstalk between adjacent waveguides in photonic integrated circuits, the minimum thickness of the cladding layers is around half a wavelength,…”
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12
Programmable flip-metasurface with dynamically tunable reflection and broadband undistorted transmission
Published in Nanophotonics (Berlin, Germany) (2024)“…We introduce a programmable flip-metasurface that can dynamically control the reflection while leaving the transmitted wavefront undistorted in an ultra-broad…”
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13
A Metacoupler for Converting Propagating Waves to Guided Waves in Wire Waveguides
Published in IEEE photonics journal (01-10-2017)“…Propagating electromagnetic waves in free space cannot directly couple to guided waves in waveguides due to momentum mismatch. Here, we propose a method to…”
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14
Mirror-Symmetry-Protected Metasurfaces Enabling Ultra-Broadband Tailored Transmission with Invariant Reflection
Published in Optics express (18-11-2024)Get full text
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15
Broadband binary-reflection-phase metasurfaces with undistorted transmission wavefront via mirror symmetry
Published in Optics express (22-05-2023)“…In this work, we report the realization of broadband binary-reflection-phase metasurfaces that simultaneously exhibit undistorted transmission wavefront. Such…”
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16
Three-Dimensional Electromagnetic Void Space
Published in Physical review letters (17-09-2021)“…Electromagnetic void space is a medium, while geometrically occupying a finite volume of space, optically equivalent to an infinitesimal point, in which…”
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17
Optically-transparent meta-window for wireless communication
Published in Optics express (06-11-2023)“…Circumventing the attenuation of microwaves during the propagation is of prime importance to wireless communication towards higher carrier frequencies. Here,…”
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18
Experimental demonstration of Luneburg lens based on hyperuniform disordered media
Published in Applied physics letters (04-02-2019)“…Hyperuniformity provides a means of categorizing many nanostructures including nano-composite materials, and the design methodology based on hyperuniform…”
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19
Band engineering method to create Dirac cones of accidental degeneracy in general photonic crystals without symmetry
Published in Optics express (07-06-2021)“…Symmetry usually plays a key role in the formation of the Dirac cone in the band structure of triangular or hexagonal systems. In this work, we demonstrate a…”
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Flip-component metasurfaces for camouflaged meta-domes
Published in Optics express (09-05-2022)“…Allowing microwaves to transmit through without changing the wavefront is one of the essential requirements of the dome structures of antenna arrays like…”
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