检索结果-内蒙古大学图书馆

Theoretical study on the exciton dynamics of coherent excitation energy transfer in the phycoerythrin 545 light-harvesting complex

引用

Chinese Physics B 2022年第1期31卷 631-641页

作者： Xue-Yan Cui Yi-Jing Yan Jian-Hua Wei Department of Physics&Beijing Key Laboratory of Optoelectronic Functional Materials and Micro-nano Devices Renmin University of ChinaBeijing 100872China Hefei National Laboratory for Physical Sciences at the Microscale&Department of Chemical Physics University of Science and Technology of ChinaHefei 230026China

The experimental observation of long-lived quantum coherence in the excitation energy transfer(EET)process of the several photosynthetic light-harvesting complexes at low and room temperatures has aroused hot *** challenges the common perception in the field of complicated pigment molecular systems and evokes considerable theoretical efforts to seek reasonable *** this work,we investigate the coherent exciton dynamics of the phycoerythrin 545(PE545)*** use the dissipation equation of motion to theoretically investigate the effect of the local pigment vibrations on the population transfer *** result indicates that the realistic local pigment vibrations do assist the energy *** demonstrate the coherence between different pigment molecules in the PE545 system is an essential ingredient in the EET process among various *** coherence makes the excitation energy delocalized,which leads to the redistribution of the excitation among all the chromophores in the steady ***,we investigate the effects of the complex high-frequency spectral density function on the exciton dynamics and find that the high-frequency Brownian oscillator model contributes most to the exciton dynamic *** discussions on the local pigment vibrations of the Brownian oscillator model suggest that the local heterogeneous protein environments and the effects of active vibration modes play a significant role in coherent energy transport.

关键词： exciton dynamics light-harvesting complex quantum coherence

来源：评论

学校读者我要写书评

暂无评论

Create Rich Oxygen Defects of Unique Tubular Hierarchical Molybdenum Dioxide to Modulate Electron Transfer Rate for Superior High-Energy Metal-Ion Hybrid Capacitor

引用

Energy & Environmental Materials 2023年第3期6卷 193-204页

作者： Heng Zhang Jinggao Wu Zhuo Zou Youcun Bai Chao Wu Qingxin Zeng Feng Liu Wei Shen Jian Jiang Chang Ming Li Institute of Clean Energy and Advanced Materials School of Materials and energySouthwest UniversityChongqing 400715China Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies Chongqing 400715China Key Laboratory of Rare Earth Optoelectronic Materials&Devices College of Chemistry and Materials EngineeringHuaihua UniversityHuaihua 418000China School of Chemistry and Chemical Engineering Chongqing UniversityChongqing 401331China Institute of Materials Science and Devices School of Materials Science and EngineeringSuzhou University of Science and TechnologySuzhou 215011China

Metal-ion capacitors could merit advantages from both batteries and capacitors,but they need to overcome the severe restrictions from their sluggish reaction kinetics of the battery type electrode and low specific capacitance of capacitor type electrode for both high energy and power ***,we use the Kirkendall effect for the first time to synthesize unique tubular hierarchical molybdenum dioxide with encapsulated nitrogen-doped carbon sheets while in situ realizing phosphorus-doping to create rich oxygen vacancies(P-MoO_(2-x)@NP-C)as a sodium-ion *** and theoretical analysis confirm that the P-doping introduced oxygen defects can partially convert the high-bond-energy Mo–O to low-bond-energy Mo–P,resulting in a low oxidation state of molybdenum for enhanced surface reactivity and rapid reaction *** as-prepared P-MoO_(2-x)@NP-C as an ion-battery electrode is further used to pair active N-doped carbon nanosheet(N-C-A)electrode for Na-ion hybrid capacitor,delivering excellent performance with an energy density of 140.3 Wh kg^(−1),a power density of 188.5 W kg^(−1)and long stable life in non-aqueous solution,which ranks the best among all reported MoO x-based hybrid capacitors.P-MoO_(2-x)@NP-C is also used to fabricate a zinc-ion hybrid capacitor,also accomplishing a remarkable energy density of 43.8 Wh kg^(−1),a power density of 93.9 W kg^(−1),and a long stable life@2A g^(−1)of 32000 cycles in aqueous solutions,solidly verifying its universal *** work not only demonstrates an innovative approach to synthesize high-performance metal ion hybrid capacitor materials but also reveals certain scientific insights into electron transfer enhancement mechanisms.

关键词： molybdenum dioxide oxygen vacancies phosphorus incorporation sodium-ion hybrid capacitor Zinc-ion hybrid capacitor

来源：评论

学校读者我要写书评

暂无评论

Preparation and Raman Spectroscopy of Low-Angle Twisted Trilayer Graphene 4

Preparation and Raman Spectroscopy of Low-Angle Twisted Tril...

引用

4th International Conference on optoelectronic Science and Materials, ICOSM 2022

作者： Zhou, Siyu Guo, Chucai Zhu, Mengjian College of Advanced Interdisciplinary Studies Hunan Provincial Key Laboratory of Novel Nano- Optoelectronic Information Materials and Devices National University of Defense Technology Hunan Changsha410073 China

ISBN: (纸本)9781510662209

Graphene is the most studied material in the world in recent years, from two dimensions to three dimensions, through Bernal stack to multilayer, and finally into graphite, we can see obvious dimensional changes. Therefore, the interaction between layers is very important, and one of them, twisted graphene, which is different from natural ordered stack, has also appeared. If the rotation angle is regarded as a new degree of freedom, angle related properties can be introduced into graphene, and a series of new physical phenomena have become a new research interest. This article shows a transfer glass slide for picking up two-dimensional materials, which can effectively pick up hBN, graphene, etc. The low-angle twisted (1+2) trilayer graphene and hexagonal boron-nitride heterojunction was made by tear-rotate-pick, and their stacking rules were observed by Raman spectroscopy. We found that after covering a certain thickness of hBN, the Raman characteristic peak intensity of the trilayer graphene has a certain attenuation, and has a great impact on the G peak, while the G peak and 2D peak positions have a shift of 2cm-1 and 5cm-1 respectively. The Raman spectrum of the low-angle twisted trilayer graphene prepared by us also shows a different characteristic peak pattern from that of the common ABA and ABC stacked trilayer graphene. Among them, the G peak of the 0.1° sample becomes flat, and the 2D peak appears an obvious inflection point. While the 0.5° sample is similar to the ABA stacked trilayer graphene, but the 2D peak is more gentle. © 2023 SPIE. All rights reserved.

关键词： Raman spectroscopy

来源：评论

学校读者我要写书评

暂无评论

High-efficiency focusing metalens based on metagrating arrays

引用

Photonics Research 2025年第2期13卷 351-359页

作者： JIA SHI GUANLONG WANG LONGHUANG TANG XIANG WANG SHAONA WANG CUIJUAN GUO HUA BAI PINGJUAN NIU JIANQUAN YAO JIDONG WENG Tianjin Key Laboratory of Optoelectronic Detection Technology and System School of Electronic and Information EngineeringTiangong UniversityTianjin 300387China Key Laboratory of Opto-Electronics Information Technology(Ministry of Education) School of Precision Instruments and Opto-Electronic EngineeringTianjin UniversityTianjin 300072China Institute of Fluid Physics China Academy of Engineering PhysicsMianyang 621900China

The flexible and precise control of wavefronts of electromagnetic waves has always been a hot issue,and the emergence of metasurfaces has provided a platform to solve this problem,but their design and optimization remain ***,we demonstrate two design and optimization methods for metagrating-based metalenses based on the highest manipulation efficiency and highest diffraction *** metalens operating at0.14 THz with numerical apertures of 0.434 is designed by these two methods for ***,the metalens is fabricated with photocuring 3D printing technology and an imaging system is built to characterize the distribution of focal *** the highest manipulation efficiency,the metalens shows a focal spot with the diameter of 0.93λand depth of focus(DOF)of 22.7λ,and the manipulation and diffraction efficiencies reach 98.1%and 58.3%.With the highest diffraction efficiency,the metalens shows a focal spot with the diameter of 0.91λand DOF of 24.6λ,and the manipulation and diffraction efficiencies reach 94.6%and 62.5%.The results show that the metalenses designed by both methods can perform a filamentous focal spot in the sub-wavelength scale with a long DOF;simultaneous high manipulation and diffraction efficiencies are obtained.A transmission imaging manner is used to verify the imaging capability of the metalenses,and the measurements are satisfactorily congruous with the anticipated *** proposed methods can stably generate focal spots beyond the physical diffraction limit,which has a broad application in terahertz imaging,communications,etc.

关键词： metalens design optimization methods metagrating arrays terahertz imaging manipulation efficiency photocuring D printing wavefront control imaging system

来源：评论

学校读者我要写书评

暂无评论

Reconfigurable optical matrix operations based on GST superlattice microring array 2

Reconfigurable optical matrix operations based on GST superl...

引用

2nd International Conference on Optical Communication and Optical Information Processing, OCOIP 2024

作者： Pang, Zhizhong Dong, Yida Shen, Mei Ge, Yanqi Lei, Lei Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province Shenzhen518060 China China College of Physics and Optoelectronic Engineering Shenzhen University Shenzhen518060 China Academy for Advanced Interdisciplinary Studies Department of Materials Science and Engineering Southern University of Science and Technology Shenzhen518000 China

ISBN: (数字)9781510688995

ISBN: (纸本)9781510688988

This paper presents a reconfigurable matrix operations for optical digital computing using microring resonator (MMR) array assisted by ZnS-SiO2/Ge2Sb2Te5 superlattice (GST-SL) phase-change material (PCM). By overlaying the GST-SL onto the MMR array, the resonant state of each MMR element can be adjusted according to the assigned matrix weights, thereby modifying the optical matrix transfer function to yield specific logical operations. This device combines both nonlinear and linear operations to achieve the building blocks, including logic minterms and maxterms, for complex logic functions. Based on the basic logic units, combinational logic functions such as full addition and full subtraction have been numerically demonstrated. Our nanostructure reduces computational complexity and provides a basis for future array expansion, offering a promising new approach for integrated optical computing and optical signal processing. © 2025 SPIE.

关键词： Optical signal processing

来源：评论

学校读者我要写书评

暂无评论

A reduction scheme of PAPR in CO-OFDM system using time-delay neural networks

引用

optoelectronics Letters 2025年

作者： TONG Zhengrong LIU Zhihong WANG Hao ZHANG Weihua ZHANG Tianhao JIA Qiqi Tianjin Key Laboratory of Thin Film Electronics and Communication Devices， Engineering Research Center for Optoelectronic Devices and Communication Technology of the Ministry of Education， School of Integrated Circuit Science and Engineering， Tianjin University of Technology

An iterative partial transmission sequence （IPTS） cascading time-delay neural network （TDNN） scheme is proposed to reduce peak-to-average power ratio （PAPR） in the coherent optical orthogonal frequency division multiplexing （CO-OFDM） systems. The IPTS algorithm further reduces computational complexity based on the partial transmission sequence （PTS） algorithm. TDNN is trained by the iterative clipping filtering （ICF） method. Simulation results show that the proposed scheme achieves a PAPR reduction of 5.84 dB when complementary cumulative distribution function （CCDF） is 10-4and an extra transmission distance of 200 km for 10-3bit error rate （BER） compared to the original signals.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Passively and actively enhanced surface plasmon resonance sensing strategies towards single molecular detection

引用

Nano Research 2022年第9期15卷 8367-8388页

作者： Boliang Jia Jiajie Chen Jie Zhou Youjun Zeng Ho-Pui Ho Yonghong Shao Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province College of Physics and Optoelectronics EngineeringShenzhen UniversityShenzhen 518060China School of Physics&Optoelectronic Engineering Guangdong University of TechnologyGuangzhou 510006China Department of Biomedical Engineering The Chinese University of Hong KongShatin 999077Hong KongChina

Surface plasmonic resonance(SPR)has been a corner stone for approaching single molecular detection due to its highsensitivity capability and simple detection mechanism,and has brought major advancements in biomedicine and life science *** decades,the successful integration of SPR with versatile techniques has been ***,several crucial limitations have hindered this technique for practical applications,such as long detection time and low overall *** review aims to provide a comprehensive summary of existing approaches in enhancing the performance of SPR sensors based on“passive”and“active”***,passive enhancement is discussed from a material aspect,including signal amplification tags and modifications of conventional ***,the focus is on the most popular active enhancement methods including electrokinetic,optical,magnetic,and acoustic manipulations that are summarized with highlights on their advantageous features and ability to concentrate target molecules at the detection ***,prospects and future development directions for developing SPR sensing towards a more practical,single molecular detection technique in the next generation are *** review hopes to inspire researchers’interests in developing SPR-related technology with more innovative and influential ideas.

关键词： surface plasmon resonance single molecular detection plasmonic materials nanotweezers(NTs) dielectrophoresis trap

来源：评论

学校读者我要写书评

暂无评论

Super retina TFT based full color microLED display via laser mass transfer

引用

Science China(Information Sciences) 2024年第11期67卷 5-19页

作者： Xu YANG Jinchai LI Xuhui PENG Chunfeng ZHAO Chao CHEN Xiaowei ZHANG Jinliang LIN Donghua LI Yuefen CHEN Zhaoxia BI Feng QIN Cheng LI Kai HUANG Junyong KANG Rong ZHANG Fujian Key Laboratory of Semiconductor Materials and Applications CI Center for OSEDEngineering Research Center of Micro-nano Optoelectronic Materials and Devices Ministry of EducationDepartment of Physics Xiamen University Future Display Institute of Xiamen Tianma Microelectronics Co. Ltd. School of Electronic Science and Engineering Xiamen University Tianma Advanced Display Technology Institute (Xiamen) Co. Ltd.

MicroLED display is considered one of the most promising technologies for next-generation displays. However, the high manufacturing cost has been a major obstacle to its accessibility to the general consumer market, and mass transfer, an essential process to achieve cost-effective manufacturing, has not yet reached commercial maturity. Critical issues, such as microLED chips, transfer equipments, and process materials, need to be addressed for the mass transfer technologies. In this work, we present a 1.63-inch full color microLED display module fabricated with laser mass transfer, which has a pixel density of 403 pixels per inch(PPI), the highest resolution ever achieved in the industry using mass transfer technologies. The laser mass transfer is realized with three process nodes: laser lift-off, laser induced forward transfer, and carrier bonding. Each node has been well explored to improve yields. Insights into the present progress and the future development of the laser mass transfer will be shared in this work.

关键词： microLED mass transfer LLO chip on wafer chip on carrier

来源：评论

学校读者我要写书评

暂无评论

Electromagnetically induced grating realization in phaseonium

引用

Communications in Theoretical Physics 2023年第8期75卷 150-155页

作者： Fazal Badshah Muqaddar Abbas Sobia Asghar Jin Xie Rahmatullah School of Electrical and Information Engineering Hubei University of Automotive TechnologyShiyan 442000China Ministry of Education Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Quantum Information and Quantum Optoelectronic DevicesSchool of PhysicsXi'an Jiaotong UniversityXi'an 710049China Quantum optics Lab.Department of Physics COMSATS University IslamabadIslamabadPakistan

We propose a method to implement electromagnetically induced grating in a phaseonium medium that has been coherently generated via atomic *** atoms have aΛ-type structure and three distinct energy levels;such atoms are originally generated in a coherent superposition of two lower *** phaseonium system is comprised of three-level atoms with aΛ-type configuration,which are initially prepared in a coherent superposition of two lower *** accomplish this spatial modulation based on the susceptibility of phaseonium medium,a standingwave field is *** looking at how an optical field diffracts at different relative phases,we find that the zeroth and first order diffraction intensities increase as the relative phase *** also investigate the impact of the Rabi frequency of the field on diffraction intensity and notice that an increasing strength of the Rabi frequency leads to amplification in the intensity of both central zeroth order and first-order ***,it has been observed that a significant rise in diffraction intensity occurs at longer interaction lengths between external fields and the atomic medium.

关键词： electromagnetically induced grating phaseonium diffraction order interaction length

来源：评论

学校读者我要写书评

暂无评论

Magnetization plateaus in the two-dimensional S=12 Heisenberg model with a 3×3 checkerboard structure

引用

Physical Review B 2025年第10期111卷 104426-104426页

作者： Xuyang Liang Dao-Xin Yao Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices State Key Laboratory of Optoelectronic Materials and Technologies Center for Neutron Science and Technology School of Physics Sun Yat-Sen University Guangzhou 510275 China

We investigate the S=1/2 antiferromagnetic Heisenberg model with a 3×3 checkerboard lattice structure in a longitudinal magnetic field. By using the stochastic series expansion quantum Monte Carlo method, we obtain the properties of the nonplateau XY phase; 1/9, 3/9, 5/9, and 7/9 magnetization plateau phases; and fully polarized phase. Then, we determine the precise phase transition critical points belonging to the three-dimensional XY universality class through finite-size scaling. Moreover, we study the longitudinal and transverse dynamic spin structure factors of this model in different phases. For the nonplateau XY phase, the energy spectra present a gap between the low-energy gapless branch and the high-energy part due to the competition of magnetic field and interaction. The gapless branch can be described by the spin wave theory of the effective “block spin” model in the canted antiferromagnetic phase. In the magnetization plateau phase, we identify that the low-energy excitations arise from the localized disturbances within the sublattice and are capable of spreading in momentum space. The high-energy quasiparticles could be the multiplet excitations similar to the “triplon” in the dimerized system and “doublon” and “quarton” in the trimerized system. This paper offers theoretical insights and interpretations for the characteristics of the ground state and the inelastic neutron scattering spectra in two-dimensional quantum magnetic materials. Specifically, it focuses on materials with odd-spin configurations in the checkerboard unit cells under the influence of a longitudinal magnetic field.

关键词： Stochastic systems

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：