Article
Optics
Wei Li, Ming Xin, Wenze Lan, Qinghu Bai, Shuo Du, Gang Wang, Baoli Liu, Changzhi Gu
Summary: By fabricating a metal-isolator-metal Salisbury-type perfect absorber, a 60-fold enhancement in photoluminescence of monolayer MoS2 was successfully achieved, with linear polarization approaching 60%. This paves a new way for developing optoelectronic devices based on TMDs.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Leixin Liu, Haiyun Wang, Lin Liu, Yan Ye, Fei Wang, Yangjian Cai, Xiaofeng Peng
Summary: We introduce a new type of radially polarized twisted partially coherent vortex beam and investigate its propagation properties through numerical examples. The results show that the beam's properties strongly depend on the handedness of the twist phase and the vortex phase. When the handedness of the two phases is the same, the beam profile remains a dark hollow shape and rotates faster during propagation.
Article
Chemistry, Multidisciplinary
Chen Wang, Luyao Feng, Junxiao Liu, Jing Fu, Jinglin Shen, Wei Qi
Summary: Au nanocluster (AuNCs)-based luminescent materials have attracted attention due to their small size, surface modification, phosphorescence lifetime, and biocompatibility. However, the low luminescence quantum yield of AuNCs limits their practical applications. In this study, AuNCs modified by 4,6-diamino-2-mercaptopyrimidine hydrate (DPT-AuNCs) were synthesized. Organic acids, citric acid (CA) and tartaric acid (TA), were used for co-assembly with DPT-AuNCs to enhance the luminescence of AuNCs-based materials. CA significantly enhanced the emission of DPT-AuNCs, while TA induced the formation of circularly polarized luminescence (CPL)-active nanofibers. This work provides a convenient method to build luminescent materials and CPL-active materials using AuNCs through co-assembly.
Article
Optics
Rui Shi, Zongzhao Wang, Shih-Te Hung, Christian Hellmann, Frank Wyrowski
Summary: Through numerical analysis, we found that tiny focal spots can be obtained by focusing through micro/nanoparticles and investigated the influence of misalignment of a real lens system on the focal spots.
Article
Chemistry, Multidisciplinary
Tsung-Shine Ko, Yen-Lun Chen
Summary: This study proposes a structure in which MoS2 is decorated with Au NPs on Si NSHs for SERS applications. The results show that the structure exhibits low detection limit and high enhancement factor, making it suitable for biomedical detection.
Article
Nanoscience & Nanotechnology
Larionette P. L. Mawlong, Kamal Kumar Paul, P. K. Giri
Summary: This study demonstrates a dramatic enhancement of photoluminescence emission from direct chemical vapor deposited monolayer MoS2 on a fluorine-doped TiO2/Au nanoparticle plasmonic substrate, attributing the enhancement to the formation of a TiO2/Au/1L-MoS2 ternary core-shell heterojunction. The enhanced absorption and improved light coupling were revealed through UV-vis absorption and Raman spectra. The observed giant PL enhancement is a result of heavy p-doping of the MoS2 lattice and exciton-plasmon coupling initiated by localized surface plasmons in Au nanoparticles underneath the MoS2 film at the interface.
Article
Optics
Lu Lu, Zhiqiang Wang, Yangjian Cai
Summary: This study derives an analytical formula for the self-focusing length of a radially polarized beam and evaluates its relation with the states of polarization. It is found that a beam with spatially inhomogeneous polarization can have a longer self-focusing length, and a low topological charge can achieve high-power density.
Article
Optics
Rosa M. Martinez-Ojeda, Carlos Hernandez-Garcia, Juan M. Bueno
Summary: This study proposes using radially polarized beams to improve the quality of SHG microscopy images, which has been shown to increase the efficiency of SHG processes and image quality, particularly for deep imaging.
OPTICS COMMUNICATIONS
(2021)
Article
Optics
Zerihun Tadele Godana, Janos Hebling, Laszlo Palfalvi
Summary: It is well-known that tight focusing of radially polarized beams using a high numerical aperture parabolic mirror can result in a strong longitudinal electric field and a small spot size. The longitudinal electric field component can accelerate electrons along the propagation axis at high intensities in the focal region, which opens up applications in particle acceleration.
Article
Chemistry, Multidisciplinary
Jing Li, Shuang Wang, Qi Jiang, Haoji Qian, Shike Hu, He Kang, Chen Chen, Xiaoyi Zhan, Aobo Yu, Sunwen Zhao, Yanhui Zhang, Zhiying Chen, Yanping Sui, Shan Qiao, Guanghui Yu, Songang Peng, Zhi Jin, Xinyu Liu
Summary: This study successfully achieved the epitaxial growth of single crystal MoS2 (SC-MoS2) monolayer on an Au (111) film, allowing for the unidirectional alignment of MoS2 domains with seamless stitching into a single crystal monolayer without GBs formation. This breakthrough in growth mode provides a new direction for the practical applications of TMDCs in microelectronics.
Article
Computer Science, Interdisciplinary Applications
Yaoju Zhang, Qiong Yu, Xinyi Chen, Bo Zhang
Summary: A solid immersion Fresnel zone plate (SI-FZP) is designed and its near-field diffraction characteristics are analyzed using the vector angular spectrum (VAS) method. The proposed analytical VAS model of formulism is validated by comparing numerical results obtained by the finite-difference time-domain simulation.
INTERNATIONAL JOURNAL OF MODERN PHYSICS C
(2022)
Article
Mathematics, Interdisciplinary Applications
Liping Zhang, Shangling He, Xi Peng, Lingqin Huang, Xiangbo Yang, Guanghui Wang, Hongzhan Liu, Yingji He, Dongmei Deng
Summary: This paper reports on the tightly focused characteristics of the auto-focusing linear polarized circular Pearcey Gaussian vortex beams (CPeGVBs) with vortex pairs both on-axis and off-axis through high numerical aperture. The study reveals that the autofocusing linear polarized CPeGVBs exhibit rotation during the tight focusing process, and analyzes the relationship between autofocusing and tight focusing. Additionally, the superiority of linear polarization CPeGVBs is demonstrated through intensity contrasts and characterization of optical polarization singularity.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Materials Science, Multidisciplinary
Yueqi Li, Zhexue Chen, Xuanping Zhou, Xianxin Wu, Zhican Zhou, Zhangqiang Li, Liuyang Xiao, Qian Liu, Xinfeng Liu, Yong Zhang
Summary: This paper describes a method for the facile fabrication of monolayer molybdenum disulfide (MoS2) supported by porous anodic alumina (PAA) membranes. The PAA-MoS2 and PAA-Au-MoS2 structures, with nanopore/nanosphere supports, exhibit significantly enhanced optical performances compared to silicon wafer-supported MoS2.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Optics
Spencer W. Jolly, Miguel A. Porras
Summary: Radially polarized light beams have various applications, and this article clarifies the differences among three valid radially polarized solutions to the paraxial wave equation that involve Laguerre polynomials.
Article
Optics
Chenxu Lu, Jinsong Li, Guojin Feng, Xiumin Gao
Summary: This paper explores the magnetization properties of radially polarized Bessel-Gaussian vortex beams with radial phase modulation in a high numerical aperture focusing system. The results demonstrate the generation of longitudinal magnetization chains with adjustable length and the formation of two magnetization chains by modulating the radial modulation parameter. The spacing between the magnetization chains can be adjusted as well. These findings have potential applications in all-optical magnetic recording, atom capture, and magnetic resonance microscopy.
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION
(2023)
Article
Optics
Nannan Li, Qi Zou, Bo Zhao, Changjun Min, Xiaocong Yuan, Michael Somekh, Fu Feng
Summary: This paper carefully investigates the propagation properties of Tamm plasmon polaritons (TPPs). Directional propagation of polarization-controlled TPP waves is achieved with the aid of nanoantenna couplers. The asymmetric double focusing of TPP wave is observed by combining nanoantenna couplers with Fresnel zone plates. Additionally, radial unidirectional coupling of TPP wave can be achieved when the nanoantenna couplers are arranged along a circular or a spiral shape, which shows superior focusing ability compared to a single circular or spiral groove since the electric field intensity at the focal point is 4 times larger. In comparison with SPPs, TPPs possess higher excitation efficiency and lower propagation loss. Numerical investigation shows that TPP waves have great potential in integrated photonics and on-chip devices.
Article
Optics
Chuangye Zhang, Changjun Min, Ling LI, Yuquan Zhang, Shibiao Wei, Xianyou Wang, Xiaocong Yuan
Summary: As a powerful molecular detection approach, tip-enhanced Raman scattering (TERS) spectroscopy has nanoscale spatial resolution, label-free detection, and high enhancement factor, making it widely used in chemistry, materials, and life sciences. This research focuses on the different performances of optical focus and surface plasmon polariton (SPP) focus in the TERS system. The cooperation of these two focuses produces maximum enhancement in a local electromagnetic field. The research also investigates the Purcell effect for enhancing Raman scattering collection in the far field in such a TERS system.
Article
Engineering, Electrical & Electronic
Haiou Li, Dongxu Kang, Kangchun Qu, Xingpeng Liu, Rongqiao Wan
Summary: The emergence of vertical GaN devices solves the insufficient voltage withstand capacity issue of horizontal GaN devices. However, the current output capability of vertical GaN devices is not comparable to that of lateral GaN devices. Therefore, a Al0.3Ga0.7N/GaN current-aperture vertical electron transistor with a SiO2-In0.05Ga0.95N hybrid current-blocking layer (CBL) is proposed. Simulation and in-depth study show that the GaN/InGaN secondary channel enhances the saturation output current and transconductance of the device, achieving higher values compared to the single-channel SiO2 CBL device. The breakdown voltage is 230 V and the on-resistance (R (on)) is only 0.58 m omega cm(2).
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Jiapeng Su, Gongli Xiao, Hongyan Yang, Jiayu Chen, Haiou Li, Xingpeng Liu, Yunhan Luo, Jianqing Li
Summary: In this paper, a multi-channel photonic crystal fiber sensor with dual-polarization and multiple materials is proposed to achieve low-interference simultaneous detection of multiple channels. The sensor utilizes polished channels around a cylindrical fiber, with different metal films and plasmonic materials added to the sensing area of each channel. The maximum wavelength sensitivities of the optimized sensor design are calculated for each channel, and its capabilities for bio-detection are analyzed. The proposed sensor has a novel design, can detect multiple channels simultaneously, has strong anti-interference capability and high sensitivity, and exhibits good sensing characteristics.
Review
Cardiac & Cardiovascular Systems
Christin G. Hong, Elizabeth Florida, Haiou Li, Philip M. Parel, Nehal N. Mehta, Alexander V. Sorokin
Summary: This systematic review and meta-analysis explored the relationship between oxidized LDL and cardiovascular disease in patients with chronic inflammatory conditions. The findings indicate that oxidized LDL levels are significantly elevated in participants with cardiovascular disease in the presence of chronic inflammation. This suggests that oxidized LDL may serve as a useful biomarker for risk stratification of cardiovascular disease in patients with chronic inflammation.
FRONTIERS IN CARDIOVASCULAR MEDICINE
(2023)
Article
Optics
Li-cheng Wang, Yang Chen, Zhen-nan Tian, Ying-de Wang, Xi-feng Ren, Qi-dai Chen
Summary: This letter investigates the influence of next-nearest-neighbor interactions on the topological properties of the SSH model. The experimental observations of delocalization transition of light in SSH lattices with nontrivial phase are in good agreement with theoretical predictions.
Article
Physics, Applied
Yuan Zhou, Sisi Gu, Ke Wang, Gang Cao, Xuedong Hu, Ming Gong, Hai-Ou Li, Guo-Ping Guo
Summary: In this work, we demonstrate a new approach to enhance the tunability of a quantum system through Floquet engineering based on longitudinal driving. By studying a multilevel model of gate-defined double quantum dots, we observe coherent interference and significantly enhanced tunability under longitudinal driving. This research is of great importance for quantum information processing.
PHYSICAL REVIEW APPLIED
(2023)
Article
Chemistry, Multidisciplinary
Xin-Xin Yang, Xiao-Yan Yang, Liang-Liang Guo, Lei Du, Peng Duan, Zhi-Long Jia, Hai-Ou Li, Guo-Ping Guo
Summary: One significant source of decoherence in superconducting circuits, known as two-level systems (TLSs), is found in amorphous oxide layers. These circuits can also be utilized as spectral and temporal TLS probes. Recent advancements in superconducting qubits allow for comprehensive investigations on the physics of TLSs. In this study, the tunable Xmon qubit decoherence time and resonance frequency were measured for over 3 days to study stochastic fluctuations. Analysis of time-domain Allan deviation and frequency-domain power spectral density indicates that two TLSs near resonance with the qubit are responsible for the fluctuations. The location of these two TLSs near the junctions was determined through extracted oscillation in T1 decay.
APPLIED SCIENCES-BASEL
(2023)
Article
Optics
Yunkun Wu, Yutao Tang, Zixian Hu, Lantian Feng, Guangcan Guo, Xifeng Ren, Guixin Li
Summary: Optical spin-orbit interaction (SOI), which simultaneously controls the spin and orbital angular momentum of light, is important for classical and quantum information applications. While SOI of light has been extensively studied in linear and nonlinear optics, it has not been explored in quantum nonlinear optical processes such as spontaneous parametric downconversion (SPDC). This study demonstrates that optical SOI in the SPDC process can be achieved through a nonlinear crystal with threefold rotational symmetry, enabling the generation and control of two-photon quantum states with controlled angular momentum.
Article
Optics
Lan-Tian Feng, Yu-Jie Cheng, Xiao-Zhuo Qi, Zhi-Yuan Zhou, Ming Zhang, Dao-Xin Dai, Guang-Can Guo, Xi-Feng Ren
Summary: This study investigates the spontaneous four-wave mixing effect in cryogenically-operated silicon waveguides and demonstrates its effectiveness in generating quantum photonic sources. The generated cryogenic photon-pair source is verified over multiple frequency channels within a bandwidth of approximately 2 THz and is utilized to generate high-quality frequency-multiplexed energy-time entangled states. This work advances the development of cryogenic nonlinear photonics and scalable integrated photonics for quantum information processing.
Article
Cardiac & Cardiovascular Systems
Alexander R. Berg, Rylee F. Petrole, Haiou Li, Alexander V. Sorokin, Alvaro Gonzalez-Cantero, Martin P. Playford, Nehal N. Mehta, Heather L. Teague
Summary: This study aimed to compare the lipoprotein profile in psoriasis patients with low cholesterol efflux capacity (CEC) to those with normal CEC using a novel nuclear magnetic resonance algorithm. The results showed that psoriasis patients with low CEC had smaller high-density lipoprotein (HDL) and low-density lipoprotein (LDL) particles, which were associated with vascular health.
FRONTIERS IN CARDIOVASCULAR MEDICINE
(2023)
Article
Optics
Shang-Yu Ren, Wei-Qiang Wang, Yu-Jie Cheng, Long Huang, Bing-Zheng Du, Wei Zhao, Guang-Can Guo, Lan-Tian Feng, Wen-Fu Zhang, Xi-Feng Ren
Summary: Dense quantum entanglement distribution is essential for practical quantum communication, quantum networks, and distributed quantum computation. In this study, we integrated a dense wavelength-division demultiplexing system and unbalanced Mach-Zehnder interferometers on a large-scale photonic chip to achieve multi-channel wavelength multiplexing entanglement distribution among distributed photonic chips. Our work demonstrates the feasibility and effectiveness of this integrated system and provides a path for practical applications of entanglement-based quantum key distribution and quantum networks.
Article
Acoustics
Wei Song, Changkui Guo, Yuting Zhao, Ya-chao Wang, Siwei Zhu, Changjun Min, Xiaocong Yuan
Summary: A study proposes an ultraviolet metasurface-assisted photoacoustic microscopy for fast, high-resolution label-free histological imaging of unprocessed tissues with uneven surfaces. This technique allows for the observation of microanatomical characteristics of cell nuclei and has the potential to benefit intraoperative pathological assessments and basic scientific research by alleviating laborious tissue preparations.
Article
Materials Science, Multidisciplinary
Yu Chen, Tao Fu, Ziquan Zhou, Daofan Wang, Zilan Deng, Ziqiang Yang, Yinbing An, Haiou Li
Summary: Improved coupled mode theory (i-CMT) is proposed to accurately fit the coupling relationship of multiple structures and express both the amplitude and phase of transmission curve. Experimental verification shows the accuracy of i-CMT and its potential in analyzing and design asymmetric coupled devices. Moreover, i-CMT confirms the presence of additional coupling terms in three or more coupled objects, leading to more accurate eigenfrequency calculation.
ADVANCED PHOTONICS RESEARCH
(2023)
Article
Optics
Zhi-Yan Wang, Xiao Xiong, Jin-Yu Liu, Qihuang Gong, Yun-Feng Xiao, Qi-Tao Cao
Summary: This study investigates the nonlinear strong coupling dynamics of second harmonic generation in an optical microresonator, revealing phenomena such as intensity-dependent Rabi oscillation and clamped maximum SHG conversion efficiency. Additionally, multiple nonlinear strong coupling physics phenomena are observed, including bistability, period-doubling bifurcation, and chaos. The study also identifies pseudoHermitian degeneracy, which enhances SHG efficiency through synchronized resonances. This work is important for the implementation of high-efficiency photonic devices and enriching the understanding of nonlinear dynamics and non-Hermitian physics in optical microresonators.
