Article
Physics, Applied
Yingjie Zhang, Junqing Li, Rui Zhao, Xingguang Liu
Summary: A cylindrical chiral-graphene-dielectric waveguide structure is proposed and the characteristics of its surface plasmonic mode are theoretically investigated. The proposed waveguide can only support vortex modes with hybrid polarization distribution, which is due to the spin-momentum locking of evanescent electromagnetic waves. The circular birefringence of chiral materials breaks the degeneracy between same-order vortex modes. The number of modes can be controlled by changing the radius of the dielectric nanowire and the Fermi level of graphene. The proposed waveguide shows potential applications in multiplex communication, chiral sensing, and the fabrication of tunable nano-photonic devices.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Engineering, Electrical & Electronic
Zhihong Li, Haiyong Zhu, Chaolong Fang
Summary: This study introduces a novel method for exciting fiber-optic SWRs using a tilted fiber grating coated with nanometric-scale gold and silicon films, leading to polarization-dependent mode transitions. Different surface waveguide modes are successfully excited and tunable TM-/TE-polarized SWRs are achieved.
JOURNAL OF LIGHTWAVE TECHNOLOGY
(2021)
Article
Optics
Haiqin Deng, Chengpeng Ji, Xinye Zhang, Pei Chen, Licheng Wu, Jie Jiang, Haishan Tian, Leyong Jiang
Summary: It has been found that the influence of surface plasmon polaritons and planar waveguide mode on TM-polarization reflected light significantly affects the threshold electric fields for optical bistable behavior. Coupling surface plasmon polaritons and planar waveguide mode can further reduce the switching threshold, thereby providing a way to realize low-threshold and tunable optical bistable devices.
OPTICS COMMUNICATIONS
(2021)
Article
Engineering, Electrical & Electronic
Mariam Saeed, Abdul Ghaffar, Majeed A. S. Alkanhal, Yasin Khan
Summary: A detailed theoretical analysis of the hybrid surface plasmon mode generation and propagation at a chiral graphene metal (CGM) interface for a cylindrical structure is presented. The study shows that the frequency band gap between lower and upper plasmon modes is sensitive and tunable with respect to chiral strength, radial distance of the waveguide, and chemical potential of graphene. Additionally, the propagation length and effective refractive index can be modulated by varying the chiral strength and chemical potential, making the proposed structure applicable for chiroptical and chemical sensing in the THz frequency regime.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Tom Yager, George Chikvaidze, Qin Wang, Ying Fu
Summary: In this study, we combined graphene with asymmetric metal metasurfaces and optimized the geometry-dependent photoresponse for optoelectronic molecular sensor devices. By precise control and characterization, along with simulations, nanofabrication, and spectroscopy, we achieved control over mid-infrared peak response wavelengths, transmittance, and reflectance. Our methods enable simple, reproducible, and targeted mid-infrared molecular sensing over a wide range of geometrical parameters. With its potential for atomic thickness and diverse nanomaterial combinations, these technologies hold high impact potential for environmental monitoring, threat detection, and point of care diagnostics.
Article
Nanoscience & Nanotechnology
Jian-Ping Liu, Wei-Lin Wang, Fang Xie, Chen Li, Xia Zhou, Ji-Hai Yu, Si-Qi Li, Ling-Ling Wang
Summary: A directional coupler consisting of a cylindrical silicon nanowire waveguide and a metal-based cylindrical hybrid plasmon waveguide is proposed in this paper, showing low insertion loss, high coupling efficiency, and extinction ratio. This coupler has the potential application in signal exchanging and mode switching between dielectric and plasmon waveguides in photonic integrated circuits.
Article
Chemistry, Physical
Akbar Asadi, Mohammad Reza Jafari, Mehran Shahmansouri
Summary: This paper introduces a symmetric graphene dielectric hybrid plasmonic waveguide structure with ultra-deep subwavelength confinement in the mid-infrared spectrum. By adjusting the waveguide geometry dimensions and graphene Fermi energy, excellent mode characteristics can be achieved, while the proposed structure exhibits very small crosstalk effects.
Article
Engineering, Electrical & Electronic
Congya You, Wenjie Deng, Ming Liu, Peng Zhou, Boxing An, Bo Wang, Songlin Yu, Yongzhe Zhang
Summary: The graphene/HgCdTe heterostructure infrared photodetectors, through utilizing a Schottky junction between n-type HgCdTe and p-type graphene, effectively dissociate photogenerated electron-hole pairs, resulting in high external quantum efficiency and responsivity.
IEEE SENSORS JOURNAL
(2021)
Article
Materials Science, Multidisciplinary
Hongyu Ren, Qianyi Shangguan, Zijun Song, Yong Zhao, Zao Yi, Guolu Ma, Jianguo Zhang, Hua Yang, Shifa Wang, Pinghui Wu
Summary: This paper presents a graphene metamaterial absorber based on impedance matching, which achieves a theoretically perfect absorption in the mid-infrared band. The designed absorber is capable of multiband stable high absorption and maintains excellent performance in a wide incident angle range. The results indicate that the graphene absorber has potential applications in biosensing, photodetection, and photocell fields.
Article
Engineering, Electrical & Electronic
Zhang-Biao Yang, Dongfang Guan, Qingfeng Zhang, Hantao Xu, Mingtuan Lin, Ximeng Zhang, Rentang Hong, Shao-Wei Yong
Summary: A novel composite waveguide based on hybrid substrate integrated waveguide and spoof surface plasmon polariton (SIW-SSPP) is proposed in this paper. By utilizing different feeding methods, the odd mode and even mode of SSPP are excited simultaneously and operate at the same frequency band, achieving co-frequency mode multiplexing for the proposed odd-even mode composite waveguide (OEMCW). Experimental results demonstrate that the proposed waveguide can operate in the range of 10.3 GHz to 18 GHz with significant isolation between the modes.
IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
(2021)
Article
Chemistry, Multidisciplinary
Chenchen Wu, Xiangdong Guo, Yu Duan, Wei Lyu, Hai Hu, Debo Hu, Ke Chen, Zhipei Sun, Teng Gao, Xiaoxia Yang, Qing Dai
Summary: In this study, a tunable infrared transparent microfluidic system with graphene plasmons was developed to identify nanoscale proteins. By adjusting the system's transparency, the infrared absorption of water was eliminated, allowing for accurate measurements of the proteins. This study provides a new platform for studying biological processes.
ADVANCED MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Mingming Feng, Baoqing Zhang, Haotian Ling, Zihao Zhang, Yiming Wang, Yilin Wang, Xijian Zhang, Pingrang Hua, Qingpu Wang, Aimin Song, Yifei Zhang
Summary: This paper presents a device that combines metal and graphene materials to achieve significant phase modulation of surface plasmon polaritons (SPPs). The experiment demonstrates that the cut-off frequency and phase of SPPs can be modulated by changing the chemical potential of graphene, and the transmittance is also controlled.
Article
Chemistry, Multidisciplinary
Kenan Elibol, Peter A. Van Aken
Summary: Controlled fabrication of devices for plasmonics on suspended graphene enables tunable localized surface plasmon resonances and the creation of hybrid 3D-2D systems, which have potential applications in adjustable dipole-dipole coupling and plasmon-mediated catalysis.
Article
Chemistry, Physical
Junxiong Guo, Lin Lin, Shangdong Li, Jianbo Chen, Shicai Wang, Wanjing Wu, Ji Cai, Tingchuan Zhou, Yu Liu, Wen Huang
Summary: Graphene plasmonic photodetectors with tunable dual-band infrared spectral selectivity driven by ferroelectric superdomain have been developed, exhibiting tunable resonance photoresponse. These devices enable applications in infrared imaging systems and detection of stationary and moving objects.
Article
Physics, Condensed Matter
Aymen Hlali, Zied Houaneb, Hassen Zairi
Summary: A novel type of tunable attenuator based on a hybrid metal-graphene structure for spoof surface plasmon polaritons (SSPP) waveguide is proposed in this paper. By adjusting the graphene's surface conductivity via a biased voltage, the attenuation of the waveguide can be tuned. Numerical simulations show that the proposed attenuator has a wide range of adjustability.
PHYSICA B-CONDENSED MATTER
(2022)
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
Chemistry, Physical
Li-Ping Sun, Xiang Zhai, Qi Lin, Gui-Dong Liu, Ling-Ling Wang
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
Optics
Xin Luo, Xiang Zhai, Lingling Wang, Qi Lin
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)