Article
Crystallography
Kaixiang Sun, Jiukai Fang, Yanpeng Shi, Shengnan Shi, Shan Zhang, Jinmei Song, Meiping Li, Xiaodong Wang, Fuhua Yang
Summary: This paper presents a structure for refractive index sensors in the terahertz band, utilizing enhanced extraordinary optical transmission to generate strong local electromagnetic field for sensing. Depending on the sensing position, the sensitivity can vary, with the highest being 51.56 GHz/RIU based on Mie scattering and the lowest being 5.13 GHz/RIU based on surface plasmon polaritons. The sensor is also capable of detecting the thickness of the analyte, with a minimum detectable height of 0.2 μm.
Article
Optics
Jingjing Hong, Xingping Zhou, Rui Zhuang, Wei Peng, Jiawei Liu, Aiping Liu, Qin Wang
Summary: A stable and manipulatable nanoparticle trapping method called Counter-Surface Plasmon Polariton Lens (CSPPL) is proposed in this paper. By adjusting the incident angle and phase difference, the optical potential depth and center position on CSPPL can be accurately controlled. This study promotes the development of integrated optical tweezers.
CHINESE OPTICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
M. J. Maleki, M. Soroosh, G. Akbarizadeh
Summary: In this study, a new structure based on surface plasmon polariton propagation is introduced for decode operation in optical circuits. A graphene monolayer is used for terahertz wave transmission, while a silicon ridge helps achieve high confinement. The designed structure shows low loss and long coupling length, controlled by adjusting the graphene chemical potential.
DIAMOND AND RELATED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Shinpei Ogawa, Shoichiro Fukushima, Masaaki Shimatani
Summary: The study found that embedded hexagonal boron nitride in metallic nanoslits exhibits extraordinary optical transmission phenomena in the infrared spectrum, attributed to the hybridization of HPPs and SPRs. The calculated electric field distribution indicates that the phenomenon is due to the unique resonance induced by the hybridization of HPPs and SPRs.
Article
Biochemistry & Molecular Biology
Feng Xu, Zhiliang Zhang, Jun Ma, Churong Ma, Bai-Ou Guan, Kai Chen
Summary: Reliable gas sensors are crucial for hydrogen gas detection and storage. In this study, large-area Pd nanostructures were fabricated, and their H-2 sensing performance was systematically studied. The results showed clear transmittance changes in the visible-near infrared range for both Pd nanoholes and nanotriangles after hydrogen absorption.
Article
Optics
Yuqing Cheng, Mengtao Sun
Summary: This study solves Maxwell's Equations to obtain the properties of PSPP and LSPR supported in Ag nanowire and Au nanorod, analyzing the propagation length and transmitted spectra, and unifying the two phenomena by finding they result from the same mechanism. The work provides an alternative way to describe SPP modes and is helpful for applications using SPP.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
B. F. Diaz-Valencia
Summary: This work theoretically demonstrates a significant enhancement of the transversal magneto-optical Kerr effect in a type II hyperbolic metamaterial through excitation of the lowest order-bulk plasmon polariton mode, leading to high localization of the electromagnetic field inside the metamaterial.
Article
Optics
P. Moroshkin, J. Plumitallo, T. Ochiai, R. Osgood III, Jimmy Xu
Summary: The optical rectification effect is observed in periodically structured metal films with broken inversion symmetry. The finite width of the metasurface and the proximity of its edges contribute to the rectification current, which is enhanced at surface plasmon polariton resonances. Position-and angle-resolved measurements show that this mechanism is more efficient than other symmetry-breaking mechanisms. The existing theory of optical rectification partially explains the observed phenomena.
Article
Chemistry, Multidisciplinary
Jun-Wei Liao, Zhen-Ting Huang, Chia-Hung Wu, Nikita Gagrani, Hark Hoe Tan, Chennupati Jagadish, Kuo-Ping Chen, Tien-Chang Lu
Summary: In this study, localized surface plasmon lasing at room temperature in the communication band was achieved using metallic nanoholes as plasmonic nanocavity and InP nanowires as gain medium. Optimization of laser performance was demonstrated through coupling between two metallic nanoholes, allowing for manipulation of lasing properties. These plasmonic nanolasers offer lower power consumption, smaller mode volumes, and higher spontaneous emission coupling factors, making them promising for high-density sensing and photonic integrated circuits.
Article
Materials Science, Multidisciplinary
Jinmei Song, Yanpeng Shi, Xiaoyu Liu, Meiping Li, Xiaodong Wang, Fuhua Yang
Summary: Enhanced extraordinary optical transmission (EOT) is achieved in the terahertz (THz) region by a gold hole array with a concentric hemisphere, resulting in significantly enhanced transmission intensity and bandwidth, as well as reduced structure size. The optical characteristics of the hemisphere-in-hole structure are thoroughly analyzed, and altering the shapes and sizes of the central particles affects the enhanced EOT. This research expands the application prospects for many THz plasmonic devices.
OPTICAL MATERIALS EXPRESS
(2021)
Article
Optics
M. S. Sutrisno, N. S. Sabri, M. H. M. Zaid, R. Hisam
Summary: The optical dispersion properties of the 20Li2O-xBi2O3-(78-x)TeO2-1Er2O3-1Ag glass system were studied. The Eo and Ed values decrease with increasing Bi2O3 concentration, reaching a maximum at x = 11 mol%. Bi2O3 acts as a glass former, inducing bond formation and contributing to average bond strength. It also minimally transforms the glass network, leading to a maximum in Ed. The dielectric properties of the glass samples were computed. The er and ei values initially decrease at x <= 7 mol% before reaching a maximum at x = 11 mol%. The localized surface plasmon resonance of the Ag NP is dependent on the dielectric properties of Er3+ host glass. The electrical chi and Clausius-Mossotti polarizability aL show a maximum at x = 13 mol%, contributing to strong localized surface plasmon resonance.
OPTICS AND LASER TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mengdi Lu, Wei Peng, Ming Lin, Fang Wang, Yang Zhang
Summary: A self-assembled templating technique using block copolymer layer was proposed for LSPR sensors, resulting in a high uniformity and density of gold nanoparticle monolayer. The performance in LSPR resonance wavelength and refractive index sensitivity significantly improved compared to conventional techniques, with a notable decrease in detection limit.
Article
Computer Science, Hardware & Architecture
Xiaolan Liu, Shiyao Chong, Yuwei Qu, Yanzhen Han
Summary: This study aims to enhance the photoconductive current and radiation characteristics of THz photoconductive antenna (PCA) by utilizing Extraordinary Optical Transmission (EOT) of light passing through subwavelength metal structures. The influence of metal grating's EOT on the transmission field of PCA was investigated by grooving the grating electrode structure. Simulation results show a significant effect of local electric field enhancement, with a 16.4-fold increase in the local electric field and a 72.3-fold increase in photocurrent intensity compared to structures without grooves. This improved plasma photoconductive structure enhances the transmission field strength and current of the PCA, thereby improving THz radiation capability.
JOURNAL OF CIRCUITS SYSTEMS AND COMPUTERS
(2023)
Article
Chemistry, Multidisciplinary
Xin Li, Yijun Zhang, Mingxiao Li, Yang Zhao, Lingqian Zhang, Chengjun Huang
Summary: An improved protocol for preparing 2D colloidal monolayers at the air/water interface was proposed, resulting in wafer-scale monolayers with increased crystal domain size and prevention of nanosphere sinking.
Article
Chemistry, Multidisciplinary
Olena Khoruzhenko, Volodymyr Dudko, Sabine Rosenfeldt, Josef Breu
Summary: Metamaterials, possessing unique properties not found in nature, have become a popular subject of research and engineering. This paper presents an effective method to produce metasurfaces with a combination of optical and thermal properties. The method utilizes liquid crystalline suspensions of nanosheets coated onto various substrates, allowing for efficient conversion of sunlight into heat. This scalable and affordable wet colloidal processing technique offers a new way to create metamaterials without high vacuum or lithographic techniques.
MATERIALS HORIZONS
(2023)
Article
Engineering, Mechanical
Yafeng Chen, Jensen Li, Jie Zhu
Summary: A topology optimization approach was developed for designing second-order phononic topological insulators based on the quantum spin Hall effect, resulting in the creation of phononic crystals with record-breaking size of overlapped bandgap. The optimized PCs were successfully used to create SPTIs arranged by hexagon and rhombus unit cells, validating the effectiveness of the optimization results. Additionally, the spatial decay of corner states was quantitatively characterized based on complex band theory, bridging topology optimization with SPTIs and enriching the understanding of corner states.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2022)
Article
Physics, Multidisciplinary
Zejian Ren, Dong Liu, Entong Zhao, Chengdong He, Ka Kwan Pak, Jensen Li, Gyu-Boong Jo
Summary: This study implemented dissipative spin-orbit-coupled bands filled with ultracold fermions and observed the breaking of parity-time symmetry as a result of the competition between spin-orbit coupling and dissipation. Tunable dissipation, introduced by state-selective atom loss, allowed for the tuning of the energy gap and its closure at the critical dissipation value, the exceptional point. In the vicinity of the critical point, the state evolution exhibited a chiral response, enabling the dynamic tuning of spin-orbit coupling and dissipation and revealing topologically robust chiral spin transfer.
Article
Physics, Multidisciplinary
Yan Meng, Xiaoxiao Wu, Yaxi Shen, Dong Liu, Zixian Liang, Xiang Zhang, Jensen Li
Summary: This article introduces a new device based on non-Hermitian topological systems, which combines the advantages of topological robustness and non-Hermiticity to achieve continuous and quantitative control of energy distribution ratio of waves. The device can be used as a sensitive beam splitter or a coupler switch, with potential applications in elastic circuits or networks.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Nanoscience & Nanotechnology
Xiaolin Chen, Hongfei Wang, Jensen Li, Kwok-yin Wong, Dangyuan Lei
Summary: In this study, the scattering properties of coupled parity-time (PT) symmetric chiral nanospheres were investigated using a scattering matrix formalism. The results showed that the scattering cross section exhibited asymmetry under different incident light environments, while the optical cross section displayed circular dichroism, especially when the PT-symmetric scatter possessed chirality. Additionally, gain and loss were found to control optical chirality, enhancing chiroptical interactions and paving the way for studying resonant chiral light-matter interactions in non-Hermitian photonics.
Article
Nanoscience & Nanotechnology
Tsz Kit Yung, Hong Liang, Jiawei Xi, Wing Yim Tam, Jensen Li
Summary: The study presents a method for Jones matrix imaging based on two-photon interference. By using a reference metasurface and measuring the interference between the reference and an unknown object, the polarization responses of the object can be obtained at pixel level. The parallelization of optical measurements in this approach eliminates the need for switching the incident polarization, and takes advantage of the parallelization prevalent in any quantum algorithms.
Article
Physics, Multidisciplinary
Xinhua Wen, Heung Kit Yip, Choonlae Cho, Jensen Li, Namkyoo Park
Summary: We propose a concept called acoustic amplifying diode that combines signal isolation and amplification in a single device. The signal is exponentially amplified in one direction with no reflection and perfectly absorbed in another direction. By using impedance matching, the device eliminates reflection in both directions and prevents backscattering to the signal source. We demonstrate the amplifying diode using an active metamaterial with nonreciprocal Willis coupling, and discuss the flexibility of implementation with the presence of both reciprocal and nonreciprocal couplings.
PHYSICAL REVIEW LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Jiawei Xi, Jian Shen, Man To Chow, Tan Li, Jack Ng, Jensen Li
Summary: Multiplexing holography combined with metasurfaces using different degrees of light freedom has provided new applications in display and information processing. Polarization-multiplexed holograms can store the maximum amount of information, but it requires using bianisotropic metasurfaces instead of conventional single-layer nanostructures, which complicates the design and generation of holograms. In this study, an integrated neural network approach is developed to directly obtain metasurface profiles from independent holograms, allowing for complex polarization holograms without detailed knowledge of physical constraints.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Physics, Multidisciplinary
Hong Liang, Hammad Ahmed, Wing Yim Tam, Xianzhong Chen, Jensen Li
Summary: In this study, a geometric phase metasurface is used to remotely and continuously control the vortex states of a heralded photon. Metasurfaces, which utilize engineered nanostructures, offer control over different dimensions of light and have versatile applications. By selecting the polarization of the heralding photon, the orbital angular momentum (OAM) of the signal photon can be remotely controlled. This research has important implications for quantum communication and information processing.
COMMUNICATIONS PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Qing Tong, Jensen Li, Shubo Wang
Summary: This research investigates the circular dichroism effect in acoustic systems. It is found that the effect is negligible in lossy metamaterials with C4 rotational symmetry but can be strongly enhanced in C2-symmetric systems with inhomogeneous loss. This enhancement is attributed to the presence of polarization band gaps and non-Hermitian exceptional points.
Article
Medicine, General & Internal
Xi Guo, Naijiang Liu, Mingkai Liu
Summary: This study aimed to investigate the role of LINC00336 in the tumorigenesis of bladder cancer (BCa). LINC00336 was found to be significantly up-regulated in BCa tissues and cell lines. Knockdown of LINC00336 blocked cell proliferation and invasion, and induced cell cycle arrest and apoptosis. These findings suggested that LINC00336 may serve as an oncogene in the initiation and progression of BCa and could be a potential therapeutic target.
ARCHIVES OF MEDICAL SCIENCE
(2023)
Article
Nanoscience & Nanotechnology
Pengfei Zhao, Liyou Luo, Yongquan Liu, Jensen Li
Summary: This study develops a transformation theory for manipulating the illusion effects of flexural waves. By introducing tailor-made thickness profiles on different curved shapes, the flexural waves can propagate in a way that is different from the actual configuration. Numerical simulations and experimental mapping confirm the effectiveness of this approach and reveal its potential applications in structural designs.
Article
Materials Science, Multidisciplinary
Xinghon Zhu, Hong-Wei Wu, Yu Zhuo, Zilin Liu, Jensen Li
Summary: This study establishes the temporal effective medium theory for acoustic metamaterials with time-varying frequency dispersion for compressibility. The formulas for the effective medium vary with different modulation parameters and the transition between dispersive and nondispersive regimes. The results have potential applications in designing temporal functional devices in classical waves such as acoustics, elastodynamics, and electromagnetism.
Article
Optics
Wai Chun Wong, Kai Ming Lau, Hong Liang, Tsz Kit Yung, Bei Zeng, Jensen Li
Summary: In this paper, we describe the quantum optical scattering of a linear dissipative metasurface using an equivalent Liouvillian dynamics. We demonstrate that the input-output relationship on the photon density matrix can be obtained by propagating the photon-moment matrix using a complete basis of the semiclassical Liouvillian superoperator. Our findings are important for characterizing quantum scattering of generally bianisotropic metasurfaces and for designing passive parity-time symmetric and non-Hermitian metasurfaces for quantum information processing applications.
Article
Materials Science, Multidisciplinary
Ya-Xi Shen, Yu-Gui Peng, Pei-Chao Cao, Jensen Li, Xue-Feng Zhu
Summary: In this study, the localization and delocalization of flat-band states in an acoustic cubic lattice are investigated theoretically and experimentally. The construction of flat-band states is found to depend only on the excitation pressures and coupling coefficients, which are frequency independent. The flat-band state can either spread into the whole lattice or be localized in a primitive cell, depending on the excitation frequency.
Article
Nanoscience & Nanotechnology
Ranran Zhang, Qiuling Zhao, Xia Wang, Kai Ming Lau, Tsz Kit Yung, Jensen Li, Wing Yim Tam
Summary: Metasurfaces with ultrathin artificial structures have garnered attention for their ability in light manipulations, especially with controllable responses. Twisted chiral structures in metasurfaces offer asymmetric responses for opposite incidences, increasing degrees of freedom in wave detections and controls. Most studies in the past focused on amplitude responses, neglecting bi-directional phase responses in characterization and light manipulation of chiral metasurfaces.
