24 papers · ranked by Valyu relevance
Shuo Liu, Tie Jun Cui, Lei Zhang, Quan Xu + 9 more
'Jian Qiang Gu' 'Wen Xuan Tang' 'Mei Qing Qi' 'Jia Guang Han' 'Wei Li Zhang' 'Xiao Yang Zhou' 'Qiang Cheng'] The concept of coding metasurface makes a link between physically metamaterial particles and digital codes, and hence it is possible to perform digital signal processing on the coding metasurface to realize…
Parsa Farzin, Amir Saman Nooramin, Mohammad Soleimani
In recent years, there has been notable advancement in programmable metasurfaces, primarily attributed to their cost-effectiveness and capacity to manipulate electromagnetic (EM) waves. Nevertheless, a significant limitation of numerous available metasurfaces is their capability to influence wavefronts only in…
Shuo Liu, Tie Jun Cui
Metamaterials or metasurfaces have been designed to precisely manipulate the scattering at every angle. Here, we propose to control the probability of random scattering appearing in the desired range of angles, which is defined in this letter as scattering cloud. We present a controllable random metasurface by simply…
Tie Jun Cui, Mei Qing Qi, Xiang Wan, Jie Zhao + 1 more
As artificial structures, metamaterials are usually described by macroscopic effective medium parameters, which are named as "analog metamaterials". Here, we propose "digital metamaterials" in two steps. Firstly, we present "coding metamaterials" that are composed of only two kinds of unit cells with 0 and π phase…
Seyed Ehsan Hosseininejad, Kasra Rouhi, Mohammad Neshat, Reza Faraji-Dana + 3 more
'Reza Faraji-Dana' 'Albert Cabellos-Aparicio' 'Sergi Abadal' 'Eduard Alarcón'] Recent emergence of metasurfaces has enabled the development of ultra-thin flat optical components through different wavefront shaping techniques at various wavelengths. However, due to the non-adaptive nature of conventional metasurfaces…
Jianzhong Chen, Chengwei Zhang, Yutong Zhao, Lei Lin + 5 more
'Tao Su' 'Bian Wu' 'Jinshan Ding' 'George Kenanakis'] A polarization-insensitive diffusion metasurface using a period-changed unit cell is presented for reducing the radar cross-section (RCS) of metallic objects in ultrawideband. Two metallic Minkowski loops are proposed as coding elements, different from traditional…
Ke Chen, Yijun Feng, Zhongjie Yang, Li Cui + 3 more
'Tian Jiang'] Ultrathin metasurface compromising various sub-wavelength meta-particles offers promising advantages in controlling electromagnetic wave by spatially manipulating the wavefront characteristics across the interface. The recently proposed digital coding metasurface could even simplify the design and…
Shuo Liu, Tie Jun Cui, Ahsan Noor, Zui Tao + 4 more
'Guo Dong Bai' 'Yan Yang' 'Xiao Yang Zhou'] Complete control of spatially propagating waves (PWs) and surface waves (SWs) is an ultimate goal that scientists and engineers seek for, in which negative reflection of PW and negative surface wave are two exotic phenomena. Here, we experimentally demonstrate an anisotropic…
Seyed Ehsan Hosseininejad, Kasra Rouhi, Mohammad Neshat, Reza Faraji‐Dana + 3 more
'Reza Faraji‐Dana' 'Albert Cabellos‐Aparicio' 'Sergi Abadal' 'Eduard Alarcón'] Recent emergence of metasurfaces has enabled the development of ultra-thin flat optical components through different wavefront shaping techniques at various wavelengths. However, due to the non-adaptive nature of conventional metasurfaces…
Hamid Rajabalipanah, Ali Abdolali, Javad Shabanpour, Ali Momeni + 1 more
'A. Cheldavi'] Recent years have witnessed an extraordinary spurt in attention toward the wave manipulating strategies revealed by coding metasurfaces as they build up a bridge between the physical and digital worlds. Newly, it has been shown that when two different coding patterns responsible for doing separate…
Parsa Farzin, Amir Saman Nooramin, Mohammad Soleimani
—In recent years, there has been notable advancement in programmable metasurfaces, primarily attributed to their costeffectiveness and capacity to manipulate electromagnetic (EM) waves. Nevertheless, a significant limitation of numerous available metasurfaces is their capability to influence wavefronts only in…
Dapeng Lao, Lianlin Li, Jun Ding, Yun Bo Li + 1 more
—The microwave imaging based on inverse scattering strategy holds important promising in the science, engineering, and military applications. Here we present a compressed-sensing (CS) inspired large- aperture computational single-sensor imager using 1-bit programmable coding metasurface for efficient microwave imaging…
Seyed Ehsan Hosseininejad, Kasra Rouhi, Mohammad Neshat, Albert Cabellos‐Aparicio + 2 more
'Albert Cabellos‐Aparicio' 'Sergi Abadal' 'Eduard Alarcón'] Abstract—Metasurfaces, the two-dimensional counterpart of metamaterials, have caught great attention thanks to their powerful capabilities on manipulation of electromagnetic waves. Recent times have seen the emergence of a variety of metasurfaces exhibiting…
Kasra Rouhi, Ali Abdolali, Susan Fallah
— In this paper, a wideband and low-scattering metasurface in terahertz (THz) is introduced. The proposed coding metasurface is composed of four different graphene square patches in one layer, which has a distinct bias voltage. By optimizing the chemical potential of each patch, the reflection phase and amplitude of a…
Anna Archetti, Matteo Bruzzone, Giulia Tagliabue, Marco dal Maschio
Bessel Beams (BBs) and BB lattices are structured-light excitation profiles frequently applied in material processing, nonlinear spectroscopy and in many fluorescence microscopy methods such as Light Sheet Microscopy (LSM). In LSM, BBs and BB-lattices offer wider excitation profiles, higher acquisition rate, enhanced…
Authors not listed
Conducting polymers (CPs) have been a versatile and effective material for dynamically controlling optical properties with applications ranging from electrochromic windows and displays to variable infrared (IR) emittance devices and terahertz modulators. In particular, its biocompatibility, flexibility, reversibility…
Yoshiaki Nishijima, Naoki To, Armandas Balcytis, Sauliur Juodkazis
Detailed spectral analysis of radiation absorption and scattering behaviors of metasurfaces was carried out via finite-difference time-domain (FDTD) photonic simulations. It revealed that, for typical metal-insulator-metal (MIM) nanodisc metasurfaces, absorbance and scattering cross-sections exhibit a ratio of…
Authors not listed
We demonstrate the numerical optimization and design of thermal emission metasurfaces that selectively radiate mid-infrared (mid-IR) circularly-polarized light. The proposed three-dimensional chiral structure, formed by the multilayer stacking of antenna elements, inherently exhibits circular polarization selectivity…
Steven H. Huang, Jiaruo Li, Zhiyuan Fan, Robert Delgado + 1 more
Infrared spectroscopy has found wide applications in the analysis of biological materials. A more recent development is the use of engineered nanostructures – plasmonic metasurfaces – as substrates for metasurface-enhanced infrared reflection spectroscopy (MEIRS). Here, we demonstrate that strong field enhancement from…
Steven H. Huang, Po-Ting Shen, Aditya Mahalanabish, Giovanni Sartorello + 3 more
Mid-Infrared (MIR) chemical imaging provides rich chemical information of biological samples in a label-free and non-destructive manner. Yet, its adoption to live-cell analysis is limited by the strong attenuation of MIR light in water, often necessitating cell culture geometries that are incompatible with the…
Jacob Waitkus, JaeWoo Park, Theodore Ndukaife, Sui Yang + 1 more
This study demonstrates a silicon nanopillar metasurface coupled with localized surface plasmon resonance (LSPR) mediated by the presence of cephalexin antibiotics in solution for biosensing applications. A facile fabrication process was developed to create the metasurface on silicon wafers with a unique resonance…
Authors not listed
In the field of mid-infrared (m-IR) applications, there is a need to control thermal radiation from metal-insulator-metal (MIM) metasurfaces without any optical components. Here, we introduce the concept of metalens for the MIM metasurfaces. The finite difference time domain (FDTD) simulation was used to design the…
Yoshiaki Nishijima, Saulius Juodkazis
Coupling between light and molecular vibrational modes is dependent on efficiency of molecular absorption. Here we demonstrate how to control coupling between molecular mid-infrared absorption/emission at chemical fingerprinting spectral window and metasurface using SiO2 as the absorber/emitetr and CaF2 as a spacer to…
Yoshiaki Nishijima, Shunya Kimura, Yu Takeshima, Saulius Jodkazis
Control of light absorption and transmission by metal-insulator-metal (MIM) metasurfaces are important for applications in optical windows. In this study we show realization of photo-thermal energy conversion for the radiative cooling. By controlling absorption and transparency of MIM metasurfaces with thin metal…