Results 51 to 60 of about 1,043 (213)

Asynchronous Circuits as an Enabler of Scalable and Programmable Metasurfaces [PDF]

2018 IEEE International Symposium on Circuits and Systems (ISCAS), 2018
Metamaterials and metasurfaces have given possibilities for manipulating electromagnetic (EM) waves that in the past would have seemed impossible. The majority of metasurface designs are suitable for a particular frequency and angle of incidence. One long-sought objective is the design of programmable metasurfaces to dynamically manipulate a variety of
Petrou, Loukas, Karousios, Petros, Georgiou, Julius, Petrou, Loukas, Karousios, Petros, Georgiou, Julius   +5 more
openaire   +3 more sources

Evolution of the Electromagnetic Manipulation: From Tunable to Programmable and Intelligent Metasurfaces

Micromachines, 2021
Looking back on the development of metamaterials in the past 20 years, metamaterials have gradually developed from three-dimensional complex electromagnetic structures to a two-dimensional metasurface with a low profile, during which a series of ...
Sisi Luo, Jianjiao Hao, Fuju Ye, Jiaxin Li, Ying Ruan, Haoyang Cui, Wenjun Liu, Lei Chen   +7 more
doaj   +1 more source

Programmable VO2 metasurface for terahertz wave beam steering

iScience, 2022
Summary: Programmable vanadium dioxide (VO2) metasurface is proposed at THz frequencies. The insulating and metallic states of VO2 can be switched via external electrical stimulation, resulting in the dynamical modulation of electromagnetic response. The
Daquan Yang, Weiguang Wang, Erpeng Lv, Haiming Wang, Bingchao Liu, Yanzhao Hou, Jin-hui Chen   +6 more
doaj   +1 more source

Programmable polariton canalization in reconfigurable metasurfaces. [PDF]

Sci Adv
The topological transition of polariton dispersion in twisted van der Waals layers at the photonic magic angle results in the diffraction-less and collimated propagation state, termed canalization regime. This type of robust transport of polaritons (i.e., polariton canalization) holds promise for subwavelength control of energy flows. However, the lack
Xu Y, Su X, Deng F, Wang Y, Yang Y, Alonso-González P, Chen H, Li J, Duan J, Guo Z.   +9 more
europepmc   +4 more sources

Programmable Metasurface-Based Multicast Systems: Design and Analysis [PDF]

IEEE Journal on Selected Areas in Communications, 2020
This paper considers a multi-antenna multicast system with programmable metasurface (PMS) based transmitter. Taking into account of the finite-resolution phase shifts of PMSs, a novel beam training approach is proposed, which achieves comparable performance as the exhaustive beam searching method but with much lower time overhead.
Xiaoling Hu 0001, Caijun Zhong, Yongxu Zhu, Xiaoming Chen 0001, Zhaoyang Zhang 0001   +4 more
openaire   +2 more sources

Programmable metasurface RCS prediction under obstacles based on DNN

Frontiers in Materials, 2022
Programmable metasurfaces have attracted significant attention in various applications such as radar and 6G communications, owing to their ability freely shape the far-field pattern.
Yutong Jiang, Rongrong Zhu, Rongrong Zhu, Bo Yang, Huan Lu, Huan Lu, Tianhang Chen, Bin Zheng, Bin Zheng   +8 more
doaj   +1 more source

Chiral Phase Change Nanomaterials

Advanced Functional Materials, EarlyView.
This work demonstrates reversible, non‐volatile phase transitions in chiral Ge2${\rm Ge}_2$Sb2${\rm Sb}_2$Te5${\rm Te}_5$ (GST) nanohelices for high‐speed optical modulation of chirality and dynamic control of the state of polarization (SOP). The chiral nanostructures are fabricated using a highly directional, wafer‐scale physical vapor deposition ...
Joshua A. Burrow, Md Shah Alam, Riad Yahiaoui, Evan M. Smith, Ryan Laing, Jules Gardener, Thomas A. Searles, Piyush J. Shah, Shivashankar Vangala, Joshua R. Hendrickson, Andrew M. Sarangan, Imad Agha   +11 more
wiley   +1 more source

From Photoalignment to Structured Light: Liquid Crystal Platforms for Beam Shaping and Complex Wavefronts

Advanced Functional Materials, EarlyView.
Photoaligned and photopatterned liquid crystal platforms provide programmable control of optical phase, polarization, and spin‐orbit interactions, enabling compact generation of structured light and complex wavefronts. This review highlights how tailored molecular orientations transform simple beams into designed optical fields, opening versatile ...
Le Zhou, Tingjun Zhong, Sijie Liu, Pouya Nosratkhah, Ke Xu, Yuzhen Zhao, Kristiaan Neyts   +6 more
wiley   +1 more source

Magnesium‐Based Transient Bioelectronics, Bio‐Optics and Bio‐Scaffolds

Advanced Functional Materials, EarlyView.
This paper reviews the state of the art and recent advances in magnesium‐based thin‐film, foils, and scaffolds for applications in transient bio‐optics, bioelectronics and tissue engineering. The design principles, fabrication methods, material properties, and integration strategies are discussed in detail.
Massimo Mariello, Yves Leterrier
wiley   +1 more source

Fault Tolerance in Programmable Metasurfaces: The Beam Steering Case [PDF]

2019 IEEE International Symposium on Circuits and Systems (ISCAS), 2019
Metasurfaces, the two-dimensional counterpart of metamaterials, have caught great attention thanks to their powerful control over electromagnetic waves. Recent times have seen the emergence of a variety of metasurfaces exhibiting not only countless functionalities, but also a reconfigurable or even programmable response.
Taghvaee, Hamidreza, Abadal, Sergi, Georgiou, Julius, Cabellos-Aparicio, Albert, Alarcón, Eduard, Taghvaee, Hamidreza, Abadal, Sergi, Georgiou, Julius, Cabellos-Aparicio, Albert, Alarcón, Eduard   +9 more
openaire   +4 more sources