Results 31 to 40 of about 20,833 (309)

Terahertz Leaky-Wave Antennas Based on Metasurfaces and Tunable Materials [PDF]

, 2019
Terahertz frequencies are increasingly gaining attention due to the recent efforts made in narrowing the technological gap among microwave and optical components.
Tofani, Silvia, Silvia Tofani, Burghignoli P, Alessandro Galli, Tofani S, Baccarelli P, Paolo Baccarelli, Walter Fuscaldo, Fuscaldo, Walter, Galli, Alessandro, Burghignoli, Paolo, Galli A, Baccarelli, Paolo, Paolo Burghignoli, Fuscaldo W   +14 more
core   +1 more source

Graphene-based tunable coding metasurfaces in terahertz band

EPJ Applied Metamaterials, 2020
Two graphene-based tunable coding metasurfaces are proposed for beam steering in terahertz band. The coding metasurfaces are composed of the unit cell with a sandwich-like structure, which contains the top layer of anisotropic rectangular graphene ...
Feng Jialin, Shi Hongyu, Zhang Anxue, Xu Zhuo   +3 more
doaj   +1 more source

Membrane Metasurfaces

, 2022
We introduce Mie-resonant dielectric membrane metasurfaces for THz frequencies. We design silicon membrane metasurfaces with the 2 \pi phase coverage and high transmission efficiencies to provide novel opportunities for an efficient wavefront control and
Xu, Yuehong, Yang, Quanlong, Wang, Qingwei, Srivastava, Yogesh Kumar, Kravchenko, Ivan I, Han, Jiaguang, Kivshar, Yuri, Shadrivov, Ilya, Kruk, Sergey, Singh, Ranjan, Koshelev, Kirill   +10 more
core   +1 more source

3D-Printed Metasurface Units for Potential Energy Harvesting Applications at the 2.4 GHz Frequency Band

Crystals, 2021
The capability of three-dimensional printed cut-wire metasurfaces to harvest energy in frequencies around 2.4 GHz, is studied in this paper. Cut-wire metasurfaces were constructed using the Fused Filament Fabrication technique.
Z. Viskadourakis, E. Tamiolakis, O. Tsilipakos, A. C. Tasolamprou, E. N. Economou, G. Kenanakis   +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

All-Dielectric Metasurfaces with High-Fluorescence-Enhancing Capability

Applied Sciences, 2018
All-dielectric metasurfaces are an emerging subfield in photonics. Light-wave manipulation has been extensively explored in these metasurfaces. Although light–matter interaction has also been investigated in these metasurfaces, only a limited ...
Masanobu Iwanaga
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

2nd COLLOQUIUM ON THE PHYSICS AND APPLICATIONS OF METASURFACES

, 2022
Conventional optical components control light using gradual phase accumulation through propagation in refractive materials. Recently, ultrathin optical interfaces capable of controlling the light properties, including amplitude - phase - polarization and
Stéphane Lanteri, Costantino De Angelis, Rita Asquini, Giuseppe Leo, Patrice Genevet, Sébastien Cueff   +5 more
core  

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

Ultrasensitive Optical Sensing Based on Non-Hermitian Metasurfaces

, 2019
We present here an ultrasensitive optical sensing technique based on the parity-time (PT)-symmetric non-Hermitian metasurfaces. The system is composed of a pair of active and passive metasurfaces with the subtle gain-loss balance. Specifically, these two
Chen, Pai-Yen, Farhat, Mohamed
core   +1 more source