Article
Physics, Multidisciplinary
Zhi Ren, Wanqing Wang, Yinghui Zhao, Siqi Chang, Guanhua Ren, Songtao Li, Ruoxing Wang
Summary: Based on the phase change properties of vanadium dioxide (VO2), we propose a terahertz metamaterial absorber that can be switched flexibly between ultra-broadband and dual bands. The absorber achieves switching by changing the conductivity of VO2 through thermal control. Simulation results show that the absorber realizes high absorption bandwidth in the ultra-broadband mode and dual-band absorption at specific frequencies in the dual-band mode. This design significantly improves absorption performance compared to previous studies and has potential applications in terahertz devices.
FRONTIERS IN PHYSICS
(2023)
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, 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
Materials Science, Multidisciplinary
Yadgar Abdulkarim, Fatih Ozkan Alkurt, Halgurd N. Awl, Fahmi F. Muhammadsharif, Mehmet Bakir, Sekip Dalgac, Muharrem Karaaslan, Heng Luo
Summary: A new ultra-thin and dual band metamaterials perfect absorber (MPA) design was proposed in this work, operating in the frequency range from 15 to 35 THz with high absorptivity. The proposed design is insensitive to incident angles and polarization angles, suitable for applications in stealth technology and imaging.
RESULTS IN PHYSICS
(2021)
Article
Engineering, Electrical & Electronic
Pouria Zamzam, Pejman Rezaei
Summary: This paper introduces a new model of multi-layer metamaterial perfect absorber in the terahertz region, with an absorption rate of 99.99%. By adjusting parameters, dual-band and broadband absorption effects can also be achieved.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Nanoscience & Nanotechnology
Haoduo Jia, Xin Tang, Hui Li, Ziwen Qian, Ming Li, Dai Wu, Peng Li, Jianxin Wang, Xinghua Zhu, Dingyu Yang
Summary: By adjusting the graphene Fermi energy parameters, a tunable terahertz metamaterial absorber with nearly perfect absorption (100%) can be achieved. The distinct properties of graphene enable tunable terahertz absorption, and excellent absorption performance is maintained within a certain range of incident angles.
Article
Optics
Dongxu Wang, Kai-Da Xu, Siyuan Luo, Yuqing Cui, Liuyang Zhang, Zhen Liao, Jianlei Cui
Summary: In this paper, a dual-band terahertz absorber based on a metamaterial structure is designed, fabricated, and measured. The absorber achieves two absorption peaks at 0.715 and 1.013 THz with high Q-factors of 152.1 and 98.3, respectively, under TE and TM polarized incidence. The prototype of the metamaterial absorber is fabricated using electron beam lithography and electron beam evaporation technology, and its performance is tested using terahertz time-domain spectroscopy. This work offers a new option for designing multi-band terahertz metamaterial absorbers.
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
Optics
Dongwen Zeng, Shu Zong, Guiqiang Liu, Wen Yuan, Xiaoshan Liu, Zhengqi Liu
Summary: In this study, a high-performance wideband terahertz wave functional perfect absorber is presented, based on a hybrid structure of graphene and vanadium dioxide resonators. The absorber achieves dynamically adjustable absorption by managing the resonant properties via the external surroundings. The study also demonstrates the ability to manipulate the absorber's absorption bandwidth and chirality characteristics.
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
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
Multidisciplinary Sciences
Somayyeh Asgari, Tapio Fabritius
Summary: In this paper, a graphene-based multi-functional anisotropic metamaterial is designed and proposed for the 0.1-5.5 THz region. Simulations are performed using the finite element method (FEM) and an equivalent circuit modeling (ECM) approach. The metamaterial exhibits polarization-sensitive behavior and can act as a THz switch, inverter, and bi-functional mirror. It has potential applications in future THz devices and systems.
SCIENTIFIC REPORTS
(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
Ashish Kumar Chowdhary, Tanmay Bhowmik, Debabrata Sikdar
Summary: The study presents an ultrabroadband perfect metamaterial absorber with an unprecedented average absorbance of around 99% in the 300 to 4500 nm spectral range. The design is polarization-independent and angle-insensitive, making it a potential candidate for thermophotovoltaics in solar energy harvesting.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Jun Zhu, Changsong Wu, Yihong Ren
Summary: The study proposed a metamaterial absorber composed of graphene, and demonstrated that dynamic tuning of the absorption range and absorption bandwidth could be achieved by adjusting the Fermi level of the graphene. This has theoretical and engineering significance in the domains of thermal photo-voltaics, solar cells, and sensors.
RESULTS IN PHYSICS
(2021)
Article
Optics
Chang-Long Liao, Guang-Lai Fu, Sheng-Xuan Xia, Hong-Ju Li, Xiang Zhai, Ling-Ling Wang
JOURNAL OF MODERN OPTICS
(2018)
Article
Chemistry, Physical
Hai-Yu Meng, Ling-Ling Wang, Xiang Zhai, Gui-Dong Liu, Sheng-Xuan Xia
Article
Materials Science, Multidisciplinary
Quan Li, Liang Xu, Kai-Wu Luo, Ling-Ling Wang, Xiao-Fei Li
MATERIALS CHEMISTRY AND PHYSICS
(2018)
Article
Materials Science, Multidisciplinary
Jian-Ping Tang, Wen-Zhi Xiao, Ling-Ling Wang
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2018)
Article
Optics
Jing Yue, Xin Luo, Xiang Zhai, Lingling Wang, Qi Lin
OPTICS AND LASER TECHNOLOGY
(2018)
Article
Optics
Li Liu, Sheng-Xuan Xia, Xin Luo, Xiang Zhai, Ya-Bin Yu, Ling-Ling Wang
OPTICS COMMUNICATIONS
(2018)
Article
Optics
Pei-Nian Huang, Sheng-Xuan Xia, Guang-Lai Fu, Mei-Zhen Liang, Meng Qin, Xiang Zhai, Ling-Ling Wang
OPTICS COMMUNICATIONS
(2018)
Article
Optics
Gui-Dong Liu, Xiang Zhai, Hai-Yu Meng, Qi Lin, Yu Huang, Chu-Jun Zhao, Ling-Ling Wang
Article
Chemistry, Multidisciplinary
Yu Huang, Xian Zhang, Emilie Ringe, Lingwei Ma, Xiang Zhai, Lingling Wang, Zhengjun Zhang
Article
Physics, Applied
Shihao Ban, Haiyu Meng, Xiang Zhai, Xiongxiong Xue, Qi Lin, Hongjian Li, Lingling Wang
Summary: A convertible metamaterial device based on BDS and VO2 is proposed, showcasing triple-band and broad-band absorption characteristics without altering structural parameters. The system allows for dynamic tuning of resonance frequency and absorption intensity in the THz range, opening up various potential applications.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Optics
Yong Li, Shiyu Wang, Yanghong Ou, Guoli He, Xiang Zhai, Hongjian Li, Lingling Wang
Summary: The study introduces a dynamically tunable anisotropic narrowband absorber based on monolayer black phosphorous and silicon grating in the terahertz band, featuring high absorption efficiency controlled by critical coupling conditions, exceptional tunability, intrinsic anisotropy, and ease of manufacturing.
Article
Materials Science, Multidisciplinary
Liang Xu, Jian Zeng, Xin Luo, Libin Xia, Zongle Ma, Bojun Peng, Zhengquan Li, Xiang Zhai, Lingling Wang
Summary: A dual-band perfect absorber based on (CH3NH3)PbI3 is designed to significantly enhance its absorption capability by exciting localized plasmon and surface plasmon modes. The absorber forms dual-band perfect absorption peaks in the communication regime, with the absorption of (CH3NH3)PbI3 layer increased to 43.1% and 64.2% at the dual-band absorption peaks. The physical mechanism in this absorber can also be utilized to strengthen the absorption of other halide perovskites, maintaining good performance under wide angles of incidence and different polarization states.
Article
Physics, Applied
Changchun Ma, Qi Lin, Lingling Wang, Kai Huang
Summary: A novel bulk Dirac semimetal metasurface is introduced to achieve tunable dual BICs, which can transform into quasi-BICs with different lineshapes by breaking structural symmetry. The excitation mechanisms involve the coupling between magnetic quadrupole and electric dipole modes for quasi-BIC I, or the coupling of two magnetic quadrupole modes for quasi-BIC II. The resonant wavelength of BICs can be dynamically tuned by varying the Fermi energy of BDS, offering a new pathway for ultra-compact active BIC devices without re-optimizing the geometrical structures.
APPLIED PHYSICS EXPRESS
(2021)
Article
Chemistry, Physical
Liang Xu, Jian Zeng, Quan Li, Libin Xia, Xin Luo, Zongle Ma, Bojun Peng, S. X. Xiong, Zhengquan Li, Ling-Ling Wang, Yongpeng Lei
Summary: By studying 2D/2D hBN/g-C3N4 nanocomposites with different types of defects, it was found that defect-induced Z-scheme vdW heterojunctions play a key role in enhancing photocatalytic performance. Compared to perfect structures, defective structures show stronger charge transfer and full visible-light response.
APPLIED SURFACE SCIENCE
(2021)
Article
Chemistry, Physical
Jian Zeng, Liang Xu, Xin Luo, Bojun Peng, Zongle Ma, Ling-Ling Wang, Youwen Yang, Cijun Shuai
Summary: The study constructed a SiH/CeO2(111) type-II heterojunction with high stability and visible light response, showing potential as an effective photocatalyst for splitting water to hydrogen.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2021)