Article
Engineering, Electrical & Electronic
Quan-Wei Lin, Shaker Alkaraki, Hang Wong, James R. Kelly
Summary: This article presents a novel CP antenna based on an anisotropic metamaterial that can convert linear polarization to circular polarization over a wideband of frequencies in the X-band. The antenna consists of a metamaterial-based polarizer mounted above the aperture of a rectangular waveguide, oriented at 45 degrees to the waveguide's E-plane. The polarizer is composed of multiple metamaterial layers and incorporates rectangular split ring resonators on both sides of a dielectric slab. Impedance matching layers are introduced to enhance the axial-ratio bandwidth.
IEEE TRANSACTIONS ON ANTENNAS AND PROPAGATION
(2023)
Article
Multidisciplinary Sciences
Wanrong Gao
Summary: This work introduces the concept of anisotropic dielectric susceptibility matrix of anisotropic medium for both nondepolarizing and depolarizing medium, providing a new way of analyzing light scattering properties of anisotropic media illuminated by polarized light. The explicit expressions for the elements of the scattering matrix, Jones matrix, and Mueller matrix are given, which may prove stimulating for researchers working on new methods for analyzing light scattering properties.
SCIENTIFIC REPORTS
(2021)
Article
Environmental Sciences
Jiajin Li, Hongyuan Liu, Ran Liao, Hongjian Wang, Yan Chen, Jing Xiang, Xiangrong Xu, Hui Ma
Summary: Microplastics, posing a human health risk as marine pollution, are difficult to detect and recognize due to their different materials, irregular shapes, and broad size distributions. This study successfully classifies four different materials of spherical particles, including microplastics, using their Mueller matrices. Furthermore, it also effectively recognizes two types of common microplastics with broad size distributions, irregular shapes, and random orientations through the Mueller matrix. These results highlight the importance of refractive index in the recognition of microplastics suspended in water and provide insights into the physics origin of how refractive index affects Mueller matrix coupling with size and structure.
MARINE POLLUTION BULLETIN
(2023)
Article
Chemistry, Analytical
Srijan Datta, Saptarshi Mukherjee, Xiaodong Shi, Mahmood Haq, Yiming Deng, Lalita Udpa, Edward Rothwell
Summary: This paper introduces the design and application of a metamaterial lens in microwave imaging and nondestructive evaluation. Experimental results demonstrate that the metamaterial lens combined with a microwave system can achieve high sensitivity detection of subwavelength defects.
Article
Materials Science, Multidisciplinary
Muhammad Hafidzurrahman, Hadi Teguh Yudistira, Teuku Meurah Indra Riayatsyah, Adhitya Gandaryus Saputro
Summary: Multilayer metamaterials have been used to tailor material properties, but the alignment of each layer remains a critical challenge. This study focuses on the performance of negative refractive index using a touching circular unit cell of single-layer metamaterials, with varying dielectric thickness. Simulation and experimental results reveal that negative refractive index values occur for each dielectric thickness variation in single-layer metamaterials. The peaks of negative refractive index values shift with the varied dielectric thickness, and although there are disparities between simulation and experimental results due to imperfect fabrication samples, the trend in the simulation result is similar to the experimental result.
Article
Physics, Applied
Mariacarla Gonzalez, Razvigor Ossikovski, Tatiana Novikova, Jessica C. Ramella-Roman
Summary: A Mueller matrix can characterize the polarimetric properties of a medium, and parameters like depolarization, retardance and diattenuation can be obtained through decomposition methods. The introduction of a simplified 3 x 4 Mueller matrix and decomposition algorithm provides an effective way to measure and characterize samples, calculating properties such as depolarization, retardance and orientation.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Optics
Yi-Hsin Lin, Yu-Jen Wang, Hung-Chun Lin, Ming-Long Lee, Po-Lun Chen
Summary: This paper investigates optical wave propagation through a curved-birefringent medium with anisotropic absorption. An optical model based on the Mueller matrix was built to predict the spatial distributions in light intensity and polarization. Experimental demonstrations using ellipsometry were also performed to showcase the use of the optical model.
Article
Optics
Khitam Alsaedi, Khosro Madanipour
Summary: The polarization state of light has an impact on nonlinear refractive index measurement. This study combines Mueller matrix polarimetry with z-scan technique to investigate the reciprocal effects of optical nonlinearity and polarization. Through classical Mueller matrix polarimetry, the polarization states are generated before the sample in the z-scan system and analyzed after the sample and before the closed aperture detector. The thermal nonlinear refractive index of an Azo dye, Janus Green B, was measured using a CW laser at a wavelength of 655 nm, and the results were found to be highly sensitive to polarization states. The measured Mueller matrix at each position of the sample resulted in a nonlinear dependence of the related Deattenuation, Retardance, and Depolarization parameters.
OPTICS AND LASERS IN ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Zhao Chen, Yaolun Yu, Yilin Wang, Zhiling Hou, Li Yu
Summary: This study proposes a novel nanophotonics system that utilizes the interaction between high refractive index dielectric and two-dimensional metallic photonic crystal to achieve plasmon-induced transparency (PIT). The transmission and reflection characteristics of the system are demonstrated through simulations. The results show the successful implementation of stable 3D atom trapping, indicating significant potential for practical applications.
Article
Chemistry, Multidisciplinary
Fan Gao, Peicheng Yuan, Shaojun Gao, Juan Deng, Zhiyu Sun, Guoli Jin, Guanglu Zeng, Bo Yan
Summary: This paper proposes an active controlled EIT effect based on a graphene-dielectric hybrid metamaterial, which achieves a dynamic EIT effect with high quality factor and high group index, as well as demonstrating high refractive index sensitivity.
Article
Materials Science, Multidisciplinary
Wan Wang, Junhua Gao, Haibo Hu, Yuxin Jiang, Haichen Wu, Xiaoyun Li, Xiuhong Li, Lingyan Liang, Hongliang Zhang, Hongtao Cao
Summary: A novel porous dielectric material with ultrafine nanohole structure and tunable refractive index has been proposed, showing broadband high transmittance and low haze properties. Additionally, the material is mechanically stable, waterproof, and antifouling.
MATERIALS TODAY PHYSICS
(2022)
Article
Multidisciplinary Sciences
Antoine Wegrowski, Wei-Chih Wang, Chileung Tsui
Summary: In this study, we investigate three cases of metamaterials with refractive index discontinuities along the frequency spectrum. By reproducing the numerical simulations and comparing them to reported cases, we confirm or refute negative refraction at resonance frequency. Additionally, we carry out numerical and theoretical investigations on the discontinuity and show that the dynamics of the phases remain unchanged at the boundaries of the metamaterials.
SCIENTIFIC REPORTS
(2022)
Article
Automation & Control Systems
Harbinder Singh, C. P. Gandhi, Amit Gupta, Surbhi Bakshi
Summary: The study examines fuzzy cross entropy to enhance the designing and analysis of a compact single layer double negative metamaterial with varying oblique incidents. Experimental results show the structure behaving as a double negative metamaterial for all azimuth angles, achieving desired wave velocity and refractive index.
ENGINEERING APPLICATIONS OF ARTIFICIAL INTELLIGENCE
(2021)
Article
Optics
Fei Liu, Meiling Zou, Zhenjie Feng, Bo Ni, Baisong Ye, Yunji Wang
Summary: In this study, an all-dielectric metamaterial absorber composed of a ring nanocavity array, a spacer layer, and a metallic substrate is designed and investigated. The simulation results demonstrate two perfect absorption peaks (99.91% and 99.96%) achieved at 539 nm and 673 nm. The different electric and magnetic field distributions of the ring nanocavity structure result in two resonance modes, leading to distinct absorption and sensing properties. Furthermore, the influence of structural parameters, such as the width of the nanocavity, on the sensing characteristics is explored and discussed.
Article
Nanoscience & Nanotechnology
Wenjing Guo, LiHong Zhai, Zeinhom M. El-Bahy, Zhumao Lu, Lu Li, Ashraf Y. Elnaggar, Mohamed M. Ibrahim, Huiliang Cao, Jing Lin, Bin Wang
Summary: In this research, a terahertz metamaterial biosensor based on the open square ring structure is designed and its absorption performance and sensing performance are analyzed through simulation and testing. The results demonstrate that the sensor exhibits a narrow absorption peak at a resonant frequency of 0.635 THz with an absorption rate of 98.7% and a half-wave width of 8.02 GHz. The sensor shows the best absorbance when the analyte thickness is 30 μm and the opening width is 10 μm. The sensor also exhibits a high-quality factor of 79.26 and a sensitivity of 91.5 GHz/refractive index unit (RIU), making it suitable for label-free high-sensitivity biomedical sensing.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2023)
