scholarly journals Multifunctional phase modulated metasurface based on thermally tunable InSb-based terahertz meta-atom

2021 ◽  
Author(s):  
Wenxuan Wu ◽  
Rong Lin ◽  
Na Ma ◽  
Ping Jiang ◽  
Xiaoyong Hu
Keyword(s):  
Meta Atom

scholarly journals Phase-to-pattern inverse design paradigm for fast realization of functional metasurfaces via transfer learning

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Ruichao Zhu ◽  
Tianshuo Qiu ◽  
Jiafu Wang ◽  
Sai Sui ◽  
Chenglong Hao ◽  
...  
Keyword(s):  
Transfer Learning ◽  
Electromagnetic Waves ◽  
Inverse Method ◽  
Inverse Design ◽  
Learning Network ◽  
Design Paradigm ◽  
Simulation And Experiment ◽  
Meta Atom ◽  
Trained Network ◽  
Input Phase

AbstractMetasurfaces have provided unprecedented freedom for manipulating electromagnetic waves. In metasurface design, massive meta-atoms have to be optimized to produce the desired phase profiles, which is time-consuming and sometimes prohibitive. In this paper, we propose a fast accurate inverse method of designing functional metasurfaces based on transfer learning, which can generate metasurface patterns monolithically from input phase profiles for specific functions. A transfer learning network based on GoogLeNet-Inception-V3 can predict the phases of 28×8 meta-atoms with an accuracy of around 90%. This method is validated via functional metasurface design using the trained network. Metasurface patterns are generated monolithically for achieving two typical functionals, 2D focusing and abnormal reflection. Both simulation and experiment verify the high design accuracy. This method provides an inverse design paradigm for fast functional metasurface design, and can be readily used to establish a meta-atom library with full phase span.

scholarly journals Asymmetric Diffraction in Plasmonic Meta-Gratings Using an IT-Shaped Nanoslit Array

Sensors ◽  
2021 ◽  
Vol 21 (12) ◽  
pp. 4097
Author(s):  
Hee-Dong Jeong ◽  
Seong-Won Moon ◽  
Seung-Yeol Lee
Keyword(s):  
Plane Wave ◽  
Periodic Structures ◽  
Single Layer ◽  
Optical Diffraction ◽  
Back Side ◽  
Infrared Band ◽  
Effective Period ◽  
Wave Nature ◽  
Control Light ◽  
Meta Atom

Diffraction is a fundamental phenomenon that reveals the wave nature of light. When a plane wave is transmitted or reflected from a grating or other periodic structures, diffracted light waves propagate at several angles that are specified by the period of the given structure. When the optical period is shorter than the wavelength, constructive interference of diffracted light rays from the subwavelength-scale grating forms a uniform plane wave. Many studies have shown that through the appropriate design of meta-atom geometry, metasurfaces can be used to control light properties. However, most semitransparent metasurfaces are designed to perform symmetric operation with regard to diffraction, meaning that light diffraction occurs identically for front- and back-side illumination. We propose a simple single-layer plasmonic metasurface that achieves asymmetric diffraction by optimizing the transmission phase from two types of nanoslits with I- and T-shaped structures. As the proposed structure is designed to have a different effective period for each observation side, it is either diffractive or nondiffractive depending on the direction of observation. The designed structure exhibits a diffraction angle of 54°, which can be further tuned by applying different period conditions. We expect the proposed asymmetric diffraction meta-grating to have great potential for the miniaturized optical diffraction control systems in the infrared band and compact optical diffraction filters for integrated optics.

Multiband left handed biaxial meta atom at microwave frequency

2017 ◽  
Vol 4 (3) ◽  
pp. 035015 ◽  
Author(s):  
Md Mehedi Hasan ◽  
Mohammad Rashed Iqbal Faruque ◽  
Mohammad Tariqul Islam
Keyword(s):  
Microwave Frequency ◽  
Left Handed ◽  
Meta Atom

scholarly journals Double-negative acoustic metamaterial based on hollow steel tube meta-atom

2013 ◽  
Vol 113 (10) ◽  
pp. 104902 ◽  
Author(s):  
Huaijun Chen ◽  
Hongcheng Zeng ◽  
Changlin Ding ◽  
Chunrong Luo ◽  
Xiaopeng Zhao
Keyword(s):  
Steel Tube ◽  
Double Negative ◽  
Acoustic Metamaterial ◽  
Meta Atom

scholarly journals Optomechanical terahertz detection with single meta-atom resonator

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Cherif Belacel ◽  
Yanko Todorov ◽  
Stefano Barbieri ◽  
Djamal Gacemi ◽  
Ivan Favero ◽  
...  
Keyword(s):  
Terahertz Detection ◽  
Meta Atom

Circular dichroism property of conjugated gammadion meta-atom integrated on silicon waveguide

2021 ◽  
Vol 14 (3) ◽  
pp. 032006
Author(s):  
Chia-Yi Lin ◽  
Yu-Yu Chen ◽  
Pao Tai Lin ◽  
Shih-Hui Gilbert Chang
Keyword(s):  
Circular Dichroism ◽  
Silicon Waveguide ◽  
Meta Atom ◽  
Circular Dichroïsm

scholarly journals Acoustic omni meta-atom for decoupled access to all octants of a wave parameter space

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Sukmo Koo ◽  
Choonlae Cho ◽  
Jun-ho Jeong ◽  
Namkyoo Park
Keyword(s):  
Parameter Space ◽  
Wave Parameter ◽  
Meta Atom

scholarly journals Flexible and tunable electromagnetic meta-atom based on silver nanowire networks

2019 ◽  
Vol 181 ◽  
pp. 107982 ◽  
Author(s):  
Chang Liu ◽  
Jun Cai ◽  
Xinghao Li ◽  
Wenqiang Zhang ◽  
Deyuan Zhang
Keyword(s):  
Silver Nanowire ◽  
Meta Atom ◽  
Nanowire Networks

Investigation of Left-Handed Meta-Atom for Radio Frequency Shielding Application

2018 ◽  
Vol 10 (11) ◽  
pp. 1582-1587 ◽  
Author(s):  
Mohammad Tariqul Islam ◽  
Farhad Bin Ashraf ◽  
Touhidul Alam ◽  
Norbahiah Misran ◽  
Mandeep Singh Jit Singh
Keyword(s):  
Radio Frequency ◽  
Left Handed ◽  
Meta Atom
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