Results 111 to 120 of about 27,230 (299)
Scientific Reports, 2022 A broadband metasurface flat lens is proposed as a polarization-independent wideband superstrate for wave focusing and gain enhancement at Ka-band. The proposed metasurface structure consists of four metal layers and is designed with diagonally symmetric
Kanghyeok Lee +8 more
doaj +1 more source
On‐Chip Photonic Neural Network Architectures
Advanced Optical Materials, EarlyView.This review presents a comprehensive overview of on‐chip photonic neural network architectures, covering key photonic building blocks, representative network types, and emerging applications. Recent advances, implementation challenges, and future directions are examined, highlighting the potential of integrated photonics to enable ultrafast, energy ...
Seokjin Hong +7 more
wiley +1 more source
Metasurface augmented lens antennas
, 2022 In this paper the theoretical methodology of lens antennas augmented with metasurfaces is proposed and demonstrated with a 28 GHz 2D Luneburg lens. The paper presents details on a method of images to design a metasurface augmenting a lens antenna.
Alali, Bader +1 more
core +1 more source
Enhancement of Circular Dichroism in Chiral Dielectric Metasurfaces by Ion Beam Irradiation
Advanced Optical Materials, EarlyView.Ion beam irradiation enables post fabrication tuning of dissipative losses in chiral dielectric metasurfaces composed of C4 symmetric silicon nanostructures. By tailoring the absorption toward critical coupling condition, circular dichroism is enhanced from 0.70 to 0.85, demonstrating a versatile route for maximizing optical chirality and polarization ...
Anna Fitriana +6 more
wiley +1 more source
Planar metasurface retroreflector
Nature Photonics, 2017 Metasurfaces are two-dimensional arrangements of subwavelength scatterers that control the propagation of optical waves. Here, we show that cascaded metasurfaces, each performing a predefined mathematical transformation, provide a new optical design framework that enables new functionalities not yet demonstrated with single metasurfaces.
Amir Arbabi +4 more
openaire +2 more sources
, 2019 Densely integrated photonic circuits enable scalable, complex processing of optical signals, including modulation, multiplexing, wavelength conversion, and detection.
Henri J. Lezec (1716163) +13 more
core +1 more source
Advanced Optical Materials, EarlyView.Bismuth nanogratings are fabricated by pulsed laser deposition onto the nanostructured silver and polycarbonate surfaces of DVDs. They display spectrally‐narrow plasmon resonances yielding vivid colors, which are strongly sensitive to the polarization of light, angle of incidence, nature of the underlying surface and of the surrounding medium (air or ...
Fernando Chacón‐Sánchez +5 more
wiley +1 more source
Results in PhysicsPiezoelectric energy harvesting of mechanical waves exhibits great potential applications in electricity generation for low-powered electronic devices.
Kai Wang +6 more
doaj +1 more source
Application of metasurfaces in the design of performance-enhanced low-profile antennas
EPJ Applied Metamaterials, 2018 This paper presents a review of metasurface-based antennas conducted at the Microwave Communication Laboratory (MCL) of Ajou University in the Republic of Korea.
Park Ikmo
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Scalable Design and Optimization of Reconfigurable Sb2S3 Metasurfaces
Advanced Optical Materials, EarlyView.Scalable optimization methodologies are developed for reconfigurable Sb2S3 Huygens metasurfaces by combining localized phase‐match and overlap‐integral cost functions that account for inter‐element coupling. The framework enables computationally efficient design of large‐area, dual‐state flat optical devices with arbitrary wavefront transformations ...
Siddharth Padmanabha +2 more
wiley +1 more source