2024

• Record 217 of
  
  Title:A 90 SrHfO 3 -based betavoltaic/beta-photovoltaic dual-effect integrated nuclear battery
  
  Author(s):Cui, Qiming(1); Lu, Jingbin(1); Zhang, Yu(1); Yuan, Xinxu(1); Li, Chengqian(1); Zhao, Yang(1); Zheng, Renzhou(2); Li, Xiaoyi(1); Liu, Yuxin(1); Liu, Xinrui(1)
  Source:Applied Physics Letters
  Volume: 125  Issue: 16  DOI: 10.1063/5.0230622  Published: October 14, 2024  
  Abstract:In this paper, the secondary conversion idea is used to reduce the self-absorption effect of the radioactive source by combining the radioactive source with the scintillation material, so as to enhance the energy conversion efficiency of the battery. A theoretical model of a dual-effect integrated nuclear battery based on 90 SrHfO 3 doped with Ce is proposed. The emission photon and electron spectra of the β -luminescent integrated radioactive source 90 SrHfO 3 have been calculated by GEANT4. The average outgoing electron energy of SrHfO3 was calculated, and the thickness of the energy reducing material was determined. The effect of structural parameters of GaAs materials on the dual-effect integrated nuclear battery was analyzed to obtain the optimal output performance according to theoretical calculation. From the perspective of conversion efficiency, the activity density and thickness of 90 SrHfO 3 are determined to be 1.6 Ci/cm2 and 53.6 μ m. At this time, the thickness of SrHfO3 is 1.28 mm. The total maximum output power density of the optimized dual-effect integrated nuclear battery is 9.31 μ W/cm2, and the energy conversion efficiency is 0.18 % . At this point, the doping concentrations of GaAs are N a = 1.26 × 1017 cm−3 and N d = 6.31 × 1018 cm−3, and x j is 0.05 μ m . Compared with nonintegrated batteries, the output performance is significantly improved. © 2024 Author(s).
  Accession Number: 20244317252392
• Record 218 of
  
  Title:Highly sensitive CD40L protein discrimination via label-free fiber sensing technologies
  
  Author(s):Hu, Mingxuan(1); Li, Xuying(4); Li, Yansong(2); Wang, Ruiduo(1,3); Kang, Tongyuan(1); Xu, Fuxing(5); Bai, Jintao(1); Jiang, Man(1); Zhu, Yaomin(2)
  Source:Analyst
  Volume: 149  Issue: 20  DOI: 10.1039/d4an00867g  Published: August 16, 2024  
  Abstract:The recombinant Cluster of Differentiation 40 Ligand (CD40L) can be expressed in various cells and is closely related to various types of cancer. This association underscores the critical need for expedited and precise measurement of CD40L levels in clinical fluid specimens. A novel optical fiber biosensor has been devised, employing single-mode fibers that are sandwiched around a coreless fiber, with the diameter refined by etching with hydrogen fluoride. This innovative configuration allows for light transmission through the evanescent field, thereby enhancing the sensor's sensitivity to changes in the surrounding refractive index. Employing chemical binding techniques, CD40 was securely immobilized onto the fiber's surface, facilitating the detection of CD40L. The sensor exhibited a sensitivity of 1.126 nm (μg mL−1)−1 and a detection limit of 0.68 nM. Furthermore, the sensor's specificity for CD40L was validated using authentic clinical serum samples spiked with artificial analytes. In addition, the specificity of CD40L of the proposed sensor was proved using natural clinical serum samples with added artificial analyte, assisted by the ELISA method, and the results ideally conformed with the detection of standard samples. With the aid of the ELISA method, the outcomes were found to be in excellent agreement with those from standard sample detection. Consequently, the findings indicate that this sensor provides a specific, label-free, and highly sensitive method for CD40L detection, showcasing its significant potential for applications in molecular biology research. © 2024 The Royal Society of Chemistry.
  Accession Number: 20243617004110
• Record 219 of
  
  Title:Tailoring the visible light band of Watt-level SCs pumped via picosecond pulse with different Raman extent
  
  Author(s):Guo, Yashuai(1,2); Wang, Zhenguang(1); Hu, Xiaohong(1); Zhang, Ting(1,2); Zhang, Zhao(1,2); Zhang, Wei(1); Wang, Yishan(1)
  Source:Laser Physics
  Volume: 34  Issue: 8  DOI: 10.1088/1555-6611/ad552f  Published: August 2024  
  Abstract:We investigate the supercontinuum (SC) tailoring property by varying the transmission fiber length after the master oscillator power amplifier system. The conversion efficiency of the visible light band is effectively enhanced via tailoring the Raman extent of the injected 30 ps pulse into the nonlinear photonic crystal fiber (PCF). Experimentally, a 3.6 W all-fiber SC spanning from 414 nm to over 1750 nm (@20 dB) is accomplished by using a high duty cycle domestic PCF through precisely controlling the extent of Raman effect. The proposed method is instructive for the further realization of high power SC with an enhanced spectral intensity in the visible light band. © 2024 Astro Ltd.
  Accession Number: 20243817043261
• Record 220 of
  
  Title:Single shot depth-resolved imaging through dynamic turbid media
  
  Author(s):Li, Runze(1); Peng, Tong(1); Bai, Chen(1); Zhou, Meiling(1); Yu, Xianghua(1); Min, Junwei(1); Yang, Yanlong(1); Yao, Baoli(1,2)
  Source:Applied Physics Letters
  Volume: 124  Issue: 20  DOI: 10.1063/5.0201501  Published: May 13, 2024  
  Abstract:Guide star assisted wavefront shaping techniques have been exploited for focusing and imaging through turbid media by addressing a scatter inverse pattern. However, the turbid medium is required to be steady before finding the proper correction pattern, which limits applications in focusing and imaging through dynamic media, such as turbid water or blood. This study proposes a holography-based dual-polarization computational wavefront shaping method for imaging objects at variant depths behind dynamic turbid media. The orthogonal polarized output speckles of a point source (considered as a guide star) and an object are simultaneously recorded in holograms in separate regions of a single CCD camera. The holograms of the point source and object are subjected to the same distortion regardless of whether the media is static or dynamic. The hologram of the point source is used to determine the correction phase pattern for the distortion, while that of the object is used to record the complex scattered wavefront of the object. To reconstruct a clear object image, the wavefront of the scattered object is digitally corrected using the correction phase pattern and is then transferred to the image plane by calculating the transmission of the angular spectrum. Benefiting from the autofocusing feature of digital holography, objects at different depths can be recovered from a single shot hologram pair. The potential applications of the proposed method in diverse dynamic scattering media are demonstrated by imaging through a moving diffuser, turbid water, and pig blood with optical depth beyond 10. © 2024 Author(s).
  Accession Number: 20242116151946
• Record 221 of
  
  Title:Metasurface-based broadband full Stokes polarimeter with optimized simulation design
  
  Author(s):Zhao, Jiaqi(1,2); Li, Yingbo(1,2); Li, Siqi(1); Wang, Guoxi(1,2)
  Source:Applied Physics Letters
  Volume: 125  Issue: 12  DOI: 10.1063/5.0223058  Published: September 16, 2024  
  Abstract:A polarimeter, fundamental for characterizing the polarization state of light, is critical for advancing optical measurement techniques by delivering precise polarization information. A compact and portable polarimeter holds particular importance in applications like remote sensing and medical diagnosis. However, existing methods for developing a compact polarimeter are difficult to achieve full Stokes vector detection for broadband operation, and the noise immunity is also very weak. These defects significantly constrain the versatility of polarimeters across diverse application scenarios. Herein, a metadevice with dual-layer subwavelength grating structure for full Stokes vector detection has been proposed, capable of simultaneously achieving broadband detection and noise suppression. The intensity of the four elliptical polarization states of the incident light can be captured by four regions on this metadevice, enabling the computation of the full polarization state information via Mueller matrix inversion. Additionally, a set of optimized retardance at 0.73 π and orientation angles at 43°, 80°, 111°, and 146° is provided to effectively suppress the noise. The results indicate that the recovery error remains below 5% across the 450-650 nm spectral range, showcasing a 1.5-fold enhancement in noise suppression capability compared to conventional structures. © 2024 Author(s).
  Accession Number: 20243917109416
• Record 222 of
  
  Title:Femtosecond laser patterning with favorable outlines and bottom morphology based on a Dove prism system
  
  Author(s):Li, Chenchen(1,2,3); Yao, Baoli(1,3); Li, Ming(1); Zhang, Chunmin(2); Xi, Dongxue(4); Wang, Fugang(4)
  Source:Optics and Laser Technology
  Volume: 179  Issue:   DOI: 10.1016/j.optlastec.2024.111136  Published: December 2024  
  Abstract:Patterning of metal thin films on glass-ceramics with high quality is very important, but challenging, in electronic devices manufacturing. Femtosecond laser direct writing system with a Dove prism offers possibility for high quality structuring of transparent conductors on glass-ceramics and other substrates. The laser pulses movement and overlap distributions of the Dove prism laser system were investigated. The threshold and energy distribution with defocus distances for the metal thin film and glass ceramic were measured and calculated. The experiments demonstrated a clean removal of the metal thin film with a bottom roughness of 0.06 μm and a removal depth of the substrate less than 0.5 μm. The impedance was measured to be higher than 416 GΩ under 1000 V static electricity in the atmospheric environment. © 2024 Elsevier Ltd
  Accession Number: 20242516293912
• Record 223 of
  
  Title:Optimization Algorithm for Flattop Beam Shaping Using Analytically Initial Phase
  
  Author(s):Ding, Huimin(1); Mao, Jianyong(1); Chen, Wenqiang(1); Chen, Kai(2); Li, Xun(2); Tan, Yu(2); Li, Ming(2); Zhang, Lei(1)
  Source:IEEE Photonics Technology Letters
  Volume: 36  Issue: 21  DOI: 10.1109/LPT.2024.3426528  Published: 2024  
  Abstract:Accurate control over light field distribution is of great importance to laser-based technologies. Here, an improved Gerchberg-Saxton (GS) algorithm is proposed to calculate the diffraction phase for flattop beam generation. In comparison with GS algorithm with a random phase as the initial phase of the iteration process, an analytical phase with a circular distribution is employed as the initial phase in the proposed algorithm. It is verified that the proposed algorithm can be used to generate flattop beams with improved uniformity and energy utilization ratio. Furthermore, both speckle noises and the ringing effect are effectively suppressed. We believe that the proposed diffraction phase optimization algorithm can be widely applied to high-quality beam shaping applications. © 2024 IEEE. Personal use is permitted, but republication/redistribution requires IEEE permission.
  Accession Number: 20242916707375
• Record 224 of
  
  Title:Research of Induction Delay Line Anode Photon Counting Detector
  
  Author(s):Zhang, Rui-Li(1); Liu, Yong-An(1); Zhang, Ya-Long(1,2); Yang, Xiang-Hui(1); Liu, Zhe(1); Su, Tong(1); Zhao, Bao-Sheng(1); Sheng, Li-Zhi(1)
  Source:Guang Pu Xue Yu Guang Pu Fen Xi/Spectroscopy and Spectral Analysis
  Volume: 44  Issue: 5  DOI: 10.3964/j.issn.1000-0593(2024)05-1291-06  Published: May 1, 2024  
  Abstract:In this paper, we developed a photo-counting imaging detector based on the delay-line anode with induction readout, which has the advantages of high sensitivity and large detective area features. This novel detector is expected to be used in space astronomy, bioluminescence and spectral measurement applications. This detector consists of a microchannel plate (MCP) , position-sensitive anode and readout. Among these key parameters, the performance of position-sensitive anode decides the performances of detectors to a large extent. As a charge induction readout delay line anode, the delay line anode decodes the position information of the incident photon by measuring the time delay between two ends of a propagation line. The detector with the anode can obtain high detection sensitivity and a large imaging area. Image charge pickup anode is placed outside the sealed vacuum tube, which not only simplifies the process difficulty of anode production but also improves the detector's reliability. Firstly, An inductive readout delay line anode was designed. We analyzed the influence of different thicknesses and mediums material of the detector on the induction charge of the position-sensitive anode. Then, a method is used to tackle the induction charge of different layers unbalance issue. After that, we designed and fabricated a 40 mmX40 mm position-sensitive anode. The experiment results indicate that the transmission attenuation of the anode output is less than 10% , and the inter-pole crosstalk is less than 3%. Finally, we implemented aphoton-counting imaging experimental system based on this anode. This experimental system provides better than 150um spatial resolution and can promote the theoretical and practical development of large-area array and highly sensitive detector for space astronomical UV spectrum measurement. © 2024 Science Press. All rights reserved.
  Accession Number: 20242016104013
• Record 225 of
  
  Title:High-efficiency longwave 2085 nm laser output in low-loss Ho3+-doped fluorotellurite glass fiber by 1976 nm in-band pumping
  
  Author(s):Feng, Shaohua(1,2); Shen, Yewei(3); Zhu, Jun(1,2); Liu, Chengzhen(1,2); Xu, Yantao(1,2); Xiao, Xusheng(1,2); Guo, Haitao(1,2,4)
  Source:Optics and Laser Technology
  Volume: 177  Issue:   DOI: 10.1016/j.optlastec.2024.111179  Published: October 2024  
  Abstract:High-gain Ho3+-doped optical fibers are imperative exigency for > 2 µm single-mode fiber lasers. Here, we have successfully developed and fabricated a low-loss Ho3+-doped fluorotellurite glass fiber. The high-power laser irradiation tolerance of the fiber was verified, and the end face of Ho3+-doped fluorotellurite glass fiber remained undamaged under a ∼ 70 W of 981 nm CW laser irradiation. An unsaturated maximum 6.35 W@2085 nm single-mode laser output with a slope efficiency of 90.4 % was achieved in a 25 cm short fiber by homemade 1976 nm laser in-band pumping. To the best of our knowledge, this is currently the highest slope efficiency reported for Ho3+ doped fluorotellurite fiber lasers to date in a space laser cavity. The effects of the fiber length on the laser threshold, slope efficiency, and output wavelength are further discussed. This work offers valuable insights into prospective candidate materials and scheme designs for the future development of high-efficiency, long-wavelength mid-infrared ∼ 2.1 μm fiber lasers. © 2024 Elsevier Ltd
  Accession Number: 20242116111992
• Record 226 of
  
  Title:Fundamental and dipole gap solitons and their dynamics in the cubic–quintic fractional nonlinear Schrödinger model with a PT-symmetric lattice
  
  Author(s):Wang, Li(1,2,3); Zeng, Jianhua(3,4,5); Zhu, Yi(1,2)
  Source:Physica D: Nonlinear Phenomena
  Volume: 465  Issue:   DOI: 10.1016/j.physd.2024.134144  Published: September 2024  
  Abstract:The interplay of two linear controlled terms – fractional diffraction and parity-time (PT) symmetric lattice – gives rise to unique and interesting linear Bloch gap structures within where the nonlinear localized gap modes may exist. In this study, we explore the formation and dynamics of one-dimensional gap solitons in the cubic–quintic physical model combining the fractional diffraction and PT symmetric lattice. Two classes of gap solitons, which we name the fundamental gap solitons and dipole ones, are constructed and their stability regions within the first finite gap of the associated linear Bloch spectrum are identified by means of linear-stability analysis and direct perturbed numerical simulations. We stress that the gap solitons are always unstable under the condition of PT symmetry breaking (the imaginary part of which is above 0.5). The excitations of the stable two classes of gap solitons are also investigated by using the adiabatic variation of the system's parameters. The results predicted here shed some light on soliton physics in physical systems with combined fractional diffraction and PT symmetric lattice and the competing nonlinearities. © 2024
  Accession Number: 20242116134534
• Record 227 of
  
  Title:Structural insight of fluorophosphate glasses through F/O ratio: Case study of Raman and NMR spectra
  
  Author(s):Cao, Xin(1,2); Wang, Pengfei(1,2); Wan, Rui(1,2); Guo, Chen(1,2); Tian, Shuai(1,2)
  Source:Journal of Non-Crystalline Solids
  Volume: 637  Issue:   DOI: 10.1016/j.jnoncrysol.2024.123065  Published: August 1, 2024  
  Abstract:Fluorophosphate glass has excellent characteristics such as low nonlinear refractive index, anomalous partial dispersion, low phonon energy, high UV transparency and high rare earth doping concentration, etc. The two anion ions of fluorine (F) and oxygen (O) and their F/O ratio in fluorophosphate glasses provide important structural characteristics of the specific glass. To explore this, a series of fluorophosphate glass samples with theoretical F/O ratios ranging from 1 to 7 were prepared, Raman spectroscopy and 31P nuclear magnetic resonance (NMR) spectroscopy were mainly employed to elucidate the structural polyhedrons made of the network chain. The underlying correlation between the Qn units and F/O ratio was explored, i.e., the Q2 unit dominate when the F/O ratio is less than 0.3, and predominantly Q2 or Q1 unit is predominant as F/O ratio ranges from 0.3 to 1, it comes to be Q1 or Q0 unit as F/O ratio further increase to 4, while it becomes Q0 when the F/O ratio is greater than 4. The applicability of this interval estimation was verified by comprehensive analyzing a variety of structural results of fluorophosphate glasses with various glass compositions. The explored interrelation between the F/O ratio and structural property is of great significance for developing low nonlinear and UV transparent fluorophosphate glasses. © 2024 Elsevier B.V.
  Accession Number: 20242316192934
• Record 228 of
  
  Title:A Comprehensive Equivalent Circuit Model of Silicon Microring Modulators for Photonics-Electronics Codesign
  
  Author(s):Bao, Shenlei(1,2); Ma, Yingjie(2,3); Xue, Jintao(1,2); Wu, Jinyi(1,2); Qi, Nan(2,3); Wang, Binhao(1,2)
  Source:Journal of Lightwave Technology
  Volume: 42  Issue: 14  DOI: 10.1109/JLT.2024.3382091  Published: 2024  
  Abstract:Silicon microring modulators have huge potential for applications in co-packaged optics (CPO) and optical I/O (OIO) owing to the superior bandwidth, small footprint, and inherent wavelength multiplexing characteristics. To enable efficient and robust optical transceiver systems, codesign and cosimulation environments are essential for optimization of photonic devices, transceiver circuitry and electronic-photonic integrated circuits (EPIC). We introduce a comprehensive equivalent circuit model for single- and dual-segment silicon microring modulators (MRMs), which accurately capture the device behavior during high-speed modulation. This model includes electrical parasitics, nonlinear optical steady state and dynamics, and thermo-optic effects. Model parameters are extracted by curve fitting MRM optical transmission spectrum and small signal characteristics. The simulated eye diagrams exhibit excellent alignment with the measured eye diagrams at data rates of 80 Gb/s and 106 Gb/s. A cosimulation environment with a MRM driver in 28 nm CMOS and a MRM in 130 nm silicon photonics is demonstrated on an electronics design automation (EDA) platform. An optical eye diagram at a data rate of 212 Gb/s PAM8 is successfully achieved by optimizing the driver equalizer and the MRM two segment ratio. Then an EPIC with photonics-electronics closed-loop feedback control algorithm is demonstrated, achieving a significantly larger eye opening after thermal tuning, thanks to the accurate equivalent circuit model of the MRM. © 1983-2012 IEEE.
  Accession Number: 20241415849026