Results 31 to 40 of about 40,022 (295)

Electro-optic metasurfaces

Optics Express, 2022
We numerically study metasurfaces that incorporate electro-optic materials and show that they can achieve large amplitude and phase modulations across a distance that is a fraction of the operation wavelength. We show that the metasurfaces made of dielectric discs placed on a film of lithium niobate can exhibit three main types of resonances ...
Luyao Wang, Ilya Shadrivov
openaire   +2 more sources

Hunting for Monolayer Black Phosphorus with Photoluminescence Microscopy

Photonics
Monolayer black phosphorus (BP) holds great promise for naturally hyperbolic polaritons and correlated states in rectangular moiré superlattices. However, preparing and identifying high-quality monolayer BP are challenging due to its instability and high
Chenghao Pan, Yixuan Ma, Quan Wan, Boyang Yu, Shenyang Huang, Hugen Yan   +5 more
doaj   +1 more source

Luminescent hyperbolic metasurfaces [PDF]

Nature Communications, 2017
AbstractWhen engineered on scales much smaller than the operating wavelength, metal-semiconductor nanostructures exhibit properties unobtainable in nature. Namely, a uniaxial optical metamaterial described by a hyperbolic dispersion relation can simultaneously behave as a reflective metal and an absorptive or emissive semiconductor for electromagnetic ...
Smalley, JST, Vallini, F, Montoya, SA, Ferrari, L, Shahin, S, Riley, CT, Kanté, B, Fullerton, EE, Liu, Z, Fainman, Y   +9 more
openaire   +5 more sources

Regional proximity effect correction for replicating 28 nm lines/spaces in HSQ as dielectric diffraction gratings with high aspect ratio

Micro and Nano Engineering
With the rapid advances of extreme ultraviolet (EUV) lithography toward ultra-high resolution, characterization technique of EUV resists by interference lithography (IL) for 14-nm node process needs urgent upgrading because of the considerable loss of ...
Qingxin Wu, Wentao Yuan, Qiucheng Chen, Hao Quan, Yifang Chen   +4 more
doaj   +1 more source

Singular graphene metasurfaces [PDF]

EPJ Applied Metamaterials, 2019
The spatial tunability of the electron density in graphene enables the dynamic engineering of metasurfaces in the form of conductivity gratings, which can bridge the momentum gap between incident radiation and surface plasmons. Here, we discuss singular graphene metasurfaces, whose conductivity is strongly suppressed at the grating valleys.
Emanuele Galiffi, John Pendry, Paloma Arroyo Huidobro   +2 more
openaire   +4 more sources

Abnormal beam steering with kirigami reconfigurable metasurfaces

Nature Communications
Dynamically controlling electromagnetic waves at will is highly desired in many applications, but most previously realized mechanically reconfigurable metasurfaces are of restricted wave-control capabilities due to the limited tuning ranges of structural
Guobang Jiang, Yingying Wang, Ziyu Zhang, Weikang Pan, Yizhen Chen, Yang Wang, Xiangzhong Chen, Enming Song, Gaoshan Huang, Qiong He, Shulin Sun, Jizhai Cui, Lei Zhou, Yongfeng Mei   +13 more
doaj   +1 more source

Transmitted electron exposure in electron beam lithography for double-side patterning of bi-layer metasurfaces on a SiNx membrane

Micro and Nano Engineering
Metasheets, composed of two identical metasurfaces closely aligned to each other within a mode-coupling distance on the two opposite sides of a SiNx membrane, are of unique functionalities for effective modulation of electromagnetic waves by nanoscale ...
Jinyu Guo, Yifei Wang, Hao Quan, Shuoqiu Tian, Qiucheng Chen, Wentao Yuan, Qingxin Wu, Kangping Liu, Yifang Chen, Qiong He, Lei Zhou   +10 more
doaj   +1 more source

Broadband Achromatic Metasurfaces for Longwave Infrared Applications

Nanomaterials, 2021
Longwave infrared (LWIR) optics are essential for several technologies, such as thermal imaging and wireless communication, but their development is hindered by their bulk and high fabrication costs.
Naitao Song, Nianxi Xu, Dongzhi Shan, Yuanhang Zhao, Jinsong Gao, Yang Tang, Qiao Sun, Xin Chen, Yansong Wang, Xiaoguo Feng   +9 more
doaj   +1 more source

Non Thermal‐Driven Photocatalytic Ammonia Decomposition at Near‐Room Temperature on a Plasmonic Nanocone Array

Advanced Functional Materials, EarlyView.
Plasmonic photocatalytic ammonia decomposition occurs at near‐room temperature on a plasmonic Au nanocone array under visible light illumination. The nanostructure efficiently harnesses plasmonic modes, leading to increased reaction rates upon plasmon decay.
Thanh‐Lam Bui, S. M. Hossein Hejazi, Jan Navrátil, Hana Kmentová, Petr Bábor, Olivier Henrotte, Luca Mascaretti, Matteo Bisetto, Stephen K. Sanders, Andrea Schirato, Michal Otyepka, Piotr Błoński, Tiziano Montini, Radek Zboril, Paolo Fornasiero, Alessandro Alabastri, Alberto Naldoni, Stepan Kment   +17 more
wiley   +1 more source

A review of light‐controlled programmable metasurfaces for remote microwave control and hybrid signal processing

Engineering Reports, 2023
Programmable metamaterials and metasurfaces have gained great interest due to real‐time electromagnetic control and digital information processing capabilities. Different from traditional electrically‐controlled programmable metasurfaces, recently, light‐
Xin Ge Zhang, Ya Lun Sun, Zhixiang Huang, Wei Xiang Jiang   +3 more
doaj   +1 more source