Broadband diffusion metasurface based on a single anisotropic element and optimized by the Simulated Annealing algorithm.
TLDR
The proposed method provides an efficient way to design diffusion metasurface with a simple structure, which has been proved by both simulations and measurements.Abstract:
We propose a new strategy to design broadband and wide angle diffusion metasurfaces. An anisotropic structure which has opposite phases under x- and y-polarized incidence is employed as the "0" and "1" elements base on the concept of coding metamaterial. To obtain a uniform backward scattering under normal incidence, Simulated Annealing algorithm is utilized in this paper to calculate the optimal layout. The proposed method provides an efficient way to design diffusion metasurface with a simple structure, which has been proved by both simulations and measurements.read more
Citations
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Deep neural networks for the evaluation and design of photonic devices
TL;DR: In this paper, the authors show how deep neural networks, configured as discriminative networks, can learn from training sets and operate as high-speed surrogate electromagnetic solvers, inverse modelling tools and global device optimizers, and how deep generative networks can learn geometric features in device distributions and even be configured to serve as robust global optimizers.
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Coding metasurface for broadband microwave scattering reduction with optical transparency.
TL;DR: A scheme to realize broadband backward scattering reduction through diffusion-like microwave reflection by utilizing a flexible indium-tin-oxide (ITO)-based ultrathin coding metasurface (less than 0.1 wavelength thick) with high optical transparence is reported.
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Coding Metasurfaces for Diffuse Scattering: Scaling Laws, Bounds, and Suboptimal Design
Massimo Moccia,Shuo Liu,Rui Yuan Wu,Giuseppe Castaldi,Antonello Andreone,Tie Jun Cui,Vincenzo Galdi +6 more
TL;DR: A simple, deterministic suboptimal design strategy is introduced that yields results comparable with those typically obtained by approaches based on brute‐force numerical optimization, at a negligible fraction of their computational burden, thereby paving the way to the design of structures with arbitrarily large electrical size.
Journal ArticleDOI
Deterministic Approach to Achieve Broadband Polarization-Independent Diffusive Scatterings Based on Metasurfaces
He-Xiu Xu,He-Xiu Xu,Shaojie Ma,Xiaohui Ling,Xiaohui Ling,Xiao-Kuan Zhang,Shiwei Tang,Tong Cai,Shulin Sun,Qiong He,Lei Zhou +10 more
TL;DR: In this article, a robust and deterministic approach to design metasurfaces to achieve polarization-independent diffusive scatterings of electromagnetic (EM) waves within an ultrabroad frequency band and for wide-range of incident angles is proposed.
Journal ArticleDOI
An Information Theory-Inspired Strategy for Design of Re-programmable Encrypted Graphene-based Coding Metasurfaces at Terahertz Frequencies.
TL;DR: This work reveals new opportunities for the extension of re-programmable THz-coding metasurfaces and may be of interest for reflection-type security systems, computational imaging, and camouflage technology.
References
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Optimization by Simulated Annealing
TL;DR: There is a deep and useful connection between statistical mechanics and multivariate or combinatorial optimization (finding the minimum of a given function depending on many parameters), and a detailed analogy with annealing in solids provides a framework for optimization of very large and complex systems.
Book
Antenna Theory: Analysis and Design
TL;DR: The most up-to-date resource available on antenna theory and design as mentioned in this paper provides an extended coverage of ABET design procedures and equations making meeting ABET requirements easy and preparing readers for authentic situations in industry.
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Light Propagation with Phase Discontinuities: Generalized Laws of Reflection and Refraction
Nanfang Yu,Patrice Genevet,Patrice Genevet,Mikhail A. Kats,Francesco Aieta,Francesco Aieta,Jean-Philippe Tetienne,Jean-Philippe Tetienne,Federico Capasso,Zeno Gaburro,Zeno Gaburro +10 more
TL;DR: In this article, a two-dimensional array of optical resonators with spatially varying phase response and subwavelength separation can imprint phase discontinuities on propagating light as it traverses the interface between two media.
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Perfect metamaterial absorber.
TL;DR: This work fabricate, characterize, and analyze a MM absorber with a slightly lower predicted A(omega) of 96%.
Journal ArticleDOI
Dielectric metasurfaces for complete control of phase and polarization with subwavelength spatial resolution and high transmission
TL;DR: A metasurface platform based on high-contrast dielectric elliptical nanoposts that provides complete control of polarization and phase with subwavelength spatial resolution and an experimentally measured efficiency ranging from 72% to 97%, depending on the exact design.