Article
Chemistry, Physical
Md Salah Uddin Afsar, Mohammad Rashed Iqbal Faruque, Md Bellal Hossain, Mohammad Tariqul Islam, Mayeen Uddin Khandaker, D. A. Bradley, Jamel Nebhen
Summary: This paper presents a new compact octagonal split ring resonator metamaterial absorber for C-band application. The absorber, made of octagonal ring resonators and tuning fork-hammer shaped metal strips, shows dual resonance peaks and high absorption rates. The proposed design is optimized based on different parameter studies and has wide potential applications.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Energy & Fuels
Habibe Durmaz, Yuyu Li, Yasa Eksiog
Summary: This paper presents the design, simulation, and measurement of a single broad-band metamaterial absorber composed of a consecutive layer of conical-shaped SiO2/Al/SiO2/Al. The circular symmetry of the conical-shaped resonator enables the absorber to be polarization insensitive, allowing for maximum absorption of sunlight. Numerical calculations and experiments were conducted to investigate the physical behavior and the effect of geometric parameters and layer thicknesses. The results show that the absorber has an average absorption strength of around 80% within the spectral range of 400-1000 nm, and the experimental and simulation spectra are well-consistent. The proposed platform has potential applications in solar cells, photodetectors, cameras, and more.
SOLAR ENERGY MATERIALS AND SOLAR CELLS
(2023)
Article
Chemistry, Multidisciplinary
Jitendra K. Behera, Kuan Liu, Meng Lian, Tun Cao
Summary: The article presents a reconfigurable HMM perfect absorber based on alternating gold and GST225 layers for the near-infrared region, showing a red-shift of the absorptance peak and omnidirectional, polarization-independent characteristics. The absorptance peak can be reversibly switched in just five nanoseconds by changing the state of GST225.
NANOSCALE ADVANCES
(2021)
Article
Optics
Guozhang Wu, Xiaofei Jiao, Yuandong Wang, Zeping Zhao, Yibo Wang, Jianguo Liu
Summary: The proposed ultra-wideband metamaterial perfect absorber based on vanadium dioxide shows a high terahertz absorption bandwidth and controllable absorption peak intensity. By optimizing the geometric structure and using interference cancellation and impedance matching theory, the absorber achieves better absorption performance and efficiency. It has wide-angle absorption effects in both TE and TM waves, making it suitable for various applications in modulation, sensing, and imaging technology.
Article
Optics
Zhangbo Li, Xiaoan Sun, Churong Ma, Jie Li, Xiangping Li, Bai-ou Guan, Kai Chen
Summary: This study proposes ultra-narrow-band MPAs based on WS2 nanodisk arrays on gold films, achieving a 15nm ultra-narrow band in the near infrared wavelength range. The design shows great potential for applications in thermal emitters or biosensors.
Article
Engineering, Multidisciplinary
Jun Zhu, Changsong Wu
Summary: Most amino acid detection techniques currently have limitations in equipment operation procedures, detection periods, and accuracy, which do not meet the requirement of high-standard amino acid identification in the food industry. This study proposes a novel detection and identification method based on the different refractive indices of aqueous amino acid solutions. Experimental results show that this method can accurately identify amino acids, providing an important reference for further development of metamaterial sensors.
Article
Chemistry, Physical
Chenxu Zhao, Huan Wang, Yanyan Bu, Hui Zou, Xiangfu Wang
Summary: This paper introduces the absorption mechanism and design directions of metamaterial perfect absorbers (MPAs), highlighting equivalent impedance matching, plasma resonance, and interference effect as the main absorption mechanisms. The design aspects of MPAs include multiband absorption, ultra-wideband and ultra-narrowband absorption, polarization and angle insensitive absorption, and dynamically controllable tunable absorption.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Optics
Yulian Li, Wei Gao, Li Guo, Zihao Chen, Changjian Li, Haiming Zhang, Jiajia Jiao, Bowen An
Summary: A dynamically tunable ultra-broadband terahertz perfect metamaterial absorber based on vanadium oxide (VO2) has been proposed, with absorption bandwidth greater than 90% from 3.03 to 8.13 THz. By changing the conductivity of VO2, the absorption intensity can be dynamically tuned from 1.47% to 100%, showing significantly improved bandwidth and flexibility compared to previous reports.
Article
Chemistry, Physical
M. S. T. Ishrat Jahan, Mohammad Rashed Iqbal Faruque, Md Bellal Hossain, Sabirin Abdullah
Summary: We developed an ultra-thin metamaterial absorber that is insensitive to incident angle and operates in triple bands. It achieves high absorption levels of 97.8%, 99.9%, and 99.9% in the C-band, X-band, and K-band, respectively, under various incident conditions. The absorber's performance has been tested and verified, making it suitable for applications such as radar systems and electromagnetic interference reduction.
Article
Nanoscience & Nanotechnology
Xiangbo Ji, Wenzhi Qin, Xuannan Wu, Yao Wang, Fuhua Gao, Liang Wang, Yidong Hou
Summary: This study demonstrates a high-performance Laser Driven Flyer (LDF) by using a perfect metamaterial absorber (PMA) to improve the energy utilization efficiency of light. The designed Ag nanopillar array in anodic aluminum oxide templates greatly reduces the reflectivity of the flyer, resulting in an increased final speed of the flyer generated in the PMA-enhanced LDF approach.
Article
Optics
Baoqing Wang, Cuiping Ma, Peng Yu, Alexander O. Govorov, Hongxing Xu, Wenhao Wang, Lucas V. Besteiro, Zhimin Jing, Peihang LI, Zhiming Wang
Summary: In this work, an ultra-broadband nanowire metamaterial absorber composed of vertically aligned dielectric nanowires with coaxial metallic rings is proposed. The absorber exhibits strong absorption from 0.2 to 7 μm wavelength range, making it suitable for various applications.
PHOTONICS RESEARCH
(2022)
Article
Chemistry, Physical
Shruti, Bhargav Appasani, Sasmita Pahadsingh
Summary: This paper proposes a graphene-based terahertz metamaterial perfect absorber that can be used for refractive index sensing. The absorber achieves high absorption rates at four different frequencies and is insensitive to the polarization of the incident wave. It can be used to detect changes in the refractive index of chemicals. The absorption spectrum of the absorber can be adjusted by varying the Fermi energy of the graphene layer.
Article
Nanoscience & Nanotechnology
Pouria Zamzam, Pejman Rezaei, Seyed Amin Khatami
Summary: This paper presents a quad-band, polarization-insensitive metamaterial perfect absorber based on bi-layer graphene. By stacking the double layer graphene metasurface, a quad-band perfect absorber with an average absorption of 99.43% at four different frequencies is achieved. The proposed structure has advantages of tunable resonant frequency, polarization insensitivity, and tolerance to incident angles, showing potential in filtering, detection, imaging, and photodetector applications.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Materials Science, Multidisciplinary
Yadong Xie, Zhimin Liu, Fengqi Zhou, Xin Luo, Ziqiang Cheng, Ruihan Yang, Cheng Ji, Guangxin Yang
Summary: This article proposes a multifrequency narrow-band perfect absorber based on graphene-patterned metamaterial, and calculates its absorption spectrum in the NIR band. The absorber shows high absorption rates at specific wavelengths and can be influenced by factors such as polarized light, graphene pattern, and ambient refractive index. The absorber's absorption peaks display high FOM values and sensitivities. Due to its various advantages, it can be widely applied in NIR thermal radiation, optical detectors, and NIR sensors.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Thermodynamics
Jun Wu, Yasong Sun, Biyuan Wu, Chunlei Sun, Xiaohu Wu
Summary: This article designs and studies a polarization insensitive, broadband and wide-angle perfect metamaterial absorber for solar energy harvesting, which has high absorption rate and large fabrication tolerance. The absorption spectra are consistent with solar spectrum and robust against incident angle changes.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2022)
Article
Optics
Hang Dong, Zhixin Sun, Jingyi Li, Yahui Li, Wei Zhang, Guangyong Jin
Summary: This paper calculates thermal stresses and adsorption forces to determine laser cleaning conditions and establishes relevant models. Experimental results show that the removal effect is better with increasing nanosecond pulse delay, with the best effect achieved at 600 milliseconds pulse delay. Based on the findings, the mechanisms of oxide film removal involve thermal stress against adsorption and plasma shock wave breaking the oxide layer.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Junjie Zhang, Wenjun Li, Bingtao Li, Zheng-Da Hu, Jicheng Wang, Feng Zhang, Lei Wang
Summary: A multilayer thin film device structure based on Tamm plasmons is proposed for high-performance near-infrared hot electron photodetectors. By optimizing the device structure parameters, high responsivity detection can be achieved.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hong Huang, Zhiguang Han
Summary: This paper proposes a new ghost imaging reconstruction method using ordered orthogonal Hadamard derived speckle as the illumination speckle series, and introduces the alternating direction multiplier method to improve the imaging performance. The evaluation results show that the method can achieve high-quality reconstructed images under low sampling conditions.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Moritsugu Sakamoto, Yuki Ono, Kohei Noda, Tomoyuki Sasaki, Nobuhiro Kawatsuki, Masayuki Tanaka, Hiroshi Ono
Summary: The effect of wavelength and polarization of illuminating light in polarization imaging for birefringent objects placed behind a scattering structure was experimentally investigated. The result shows that the spatial distribution of the birefringent object was more clearly visualized in the longer wavelength combined with circularly polarized light illumination. This finding indicates the potential of using polarization imaging with circularly polarized light illumination in the near-infrared range for visualizing birefringent objects with scattering.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Peihui Du, Hongfang Wang, Pengwei Li, Rukeyemuhan Abadula, Hmbat Batelbek, Min Gao
Summary: In this study, we theoretically demonstrate the strong coupling between Tamm plasmons and exciton polaritons in metal Al/DBR-molecular structures, extending the operating wavelength to the deep ultraviolet region. The coupling strength can be effectively manipulated by adjusting the structure parameters, offering potential benefits for the development of new-style optical filters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Priyanka Chaudhary, Akhilesh Kumar Mishra
Summary: We design and numerically investigate the switching dynamics between two outer waveguides in a parity-time (PT)-symmetric adiabatically coupled three waveguides nonlinear directional coupler (NLDC) system. The study shows that the device can provide switching even when the middle waveguide is nonlinear and the outer waveguides are linear. Furthermore, the effect of loss to gain ratio on critical switching power and the impact of launched light power and gain (loss) value on transmitted power are also studied.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Wei Feng, Yongcong Yi, Shuyang Li, Zhi Xiong, Boya Xie, Zhen Zeng
Summary: Traditional imaging techniques are ineffective in achieving clear underwater imaging due to the presence of scattering media. Single-pixel imaging (SPI) system based on Unet++ offers a solution for reconstructing high-quality images in highly turbid water environments.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiaorui Qu, Jufeng Zhao, Haijun Tian, Junjie Zhu, Guangmang Cui
Summary: This paper studies the structural similarity between RGB and spectral images and proposes a non-iterative Images Structure Similarity (ISS) method for fast reconstruction of spectral images. Additionally, the input of the Deep Image Prior (DIP) method is optimized for the first time by using the initial spectral data reconstructed by ISS, leading to an improved starting value for the iteration. The experimental results show that the proposed method can enhance the reconstruction quality in both spectral and spatial resolutions, while significantly reducing the reconstruction time compared to other DIP-based methods.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Donghe Sheng, Zhe Han, Zanyang Qiao, Tianpei Dong, Chenxi Wang, Huiping Tian
Summary: In this study, a distributed multi-parameter sensor based on an etched few-mode multi-core fiber is proposed, allowing simultaneous sensing of temperature, strain, and sample refractive index. By combining space division multiplexing and stimulated Brillouin scattering, the sensor achieves high sensitivity in detecting these parameters.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Dehao Chen, Zhenwu Mo, Zehong Liang, Junjie Jiang, Huilin Tang, Yidan Sun, Ziyu Wang, Quanfeng Wei, Yanru Chen, Dongmei Deng
Summary: In this study, a novel family of elliptical Airyprime vortex beams (EAPVBs) is introduced, which inherits the excellent self-focusing properties of the circular Airyprime vortex beam (CAPVB). The asymmetric focusing of EAPVB leads to some novel properties, such as the splitting of high-order optical vortex and the formation of two foci. By taking advantage of these properties, EAPVB is constructed as a tunable optical bottle for particle capture.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Xiao Ma, Qiongchan Shao, Jian-Jun He
Summary: In this study, an SHS chip based on Su8 waveguide was designed and fabricated. By physically adjusting the metal electrodes and compensating for transmissivity fluctuations, the generation of side ripples was successfully suppressed.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Hongbin Zhang, Jiansen Du, Zongtao Chi, Hailin Cong, Bin Wang
Summary: In this paper, a novel type of dual-wavelength confocal metalens is proposed to solve the spatial crosstalk between two wavelengths. The metalens can greatly reduce the spatial crosstalk and achieve high precision and efficiency in confocal imaging. It can also focus light in specific wavelength ranges, making it suitable for imaging, microscopy, and optical fiber communication.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Rui Qiu, Guanmao Zhang, Shaokai Du, Jie Liu, Hongyu Jib, Kaiyun Bi, Bochuan Xing, Guangchao Diao
Summary: Recent research has developed an achromatic metalens that shows potential for replacing traditional lenses. This study focuses on a continuously variable focus height broadband achromatic metalens for long-wavelength infrared applications. By optimizing materials and parameters, chromatic aberration is effectively corrected, making it suitable for high-resolution LWIR imaging and spectroscopy systems.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Marcos Troncoso-Costas, Gaurav Jain, Yiming Li, Mohammed Patel, Lakshmi Narayanan Venkatasubramani, Sean O'Duill, Frank Smyth, Andrew Ellis, Francisco Diaz-Otero, Colm Browning, Liam Barry
Summary: In this work, a fast-switching tuneable laser capable of wide wavelength coverage, low noise and linewidth levels suitable for high-order modulation formats is demonstrated. The laser is characterized to cover a wavelength range of 35 nm in the C-band with nanosecond switching time. It is used to successfully demonstrate 480 Gbit/s 16QAM transmission over 25 km of single-mode fiber for a wavelength range of 19 nm.
OPTICS COMMUNICATIONS
(2024)
Article
Optics
Takeshi Moriyasu, Masahiko Tani, Hideaki Kitahara, Takashi Furuya, Jessica Afalla, Toshiro Kohmoto, Daishiro Koide, Hiroki Sato, Mitsutaka Kumakura
Summary: Optical pump-terahertz probe spectroscopy was used to study the photocarrier dynamics and optical characteristics of semiconductor Si. The results showed that the thickness of Si influenced the transmitted terahertz field amplitude and peak delay time, indicating differences in photocarrier dynamics between different Si materials.
OPTICS COMMUNICATIONS
(2024)