检索结果-南通市图书馆

维普期刊数据库

Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources

在线全文

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第2期13卷 325-332页

作者： Jiawei Yang Yan Chen Zhixuan Rao Ziyang Zheng Changkun Song yujie Chen Kaili Xiong Pingxing Chen Chaofan Zhang Wei Wu Ying yu siyuan yu State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-Sen UniversityGuangzhou 510006China Institute for Quantum Science and Technology College of ScienceNational University of Defense TechnologyChangsha 410073China College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Hunan Key Laboratory of Quantum Information Mechanism and Technology National University of Defense TechnologyChangsha 410073 HunanChina Hefei National Laboratory Hefei 230088China

Cavity-enhanced single quantum dots(QDs)are the main approach towards ultra-high-performance solid-state quantum light sources for scalable photonic quantum technologies.Nevertheless,harnessing the Purcell effect requires precise spectral and spatial alignment of the QDs’emission with the cavity mode,which is challenging for most cavities.Here we have successfully integrated miniaturized Fabry-Perot microcavities with a piezoelectric actuator,and demonstrated a bright single-photon source derived from a deterministically coupled QD within this microcavity.Leveraging the cavity-membrane structures,we have achieved large spectral tunability via strain tuning.On resonance,a high Purcell factor of~9 is attained.The source delivers single photons with simultaneous high extraction efficiency of 0.58,high purity of 0.956(2)and high indistinguishability of 0.922(4).Together with its compact footprint,our scheme facilitates the scalable integration of indistinguishable quantum light sources on-chip,therefore removing a major barrier to the development of solid-state quantum information platforms based on QDs.

关键词： quantum removing purity

Single photon emitter deterministically coupled to a topological corner state

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Light(Science & Applications) 2024年第1期13卷 135-141页

作者： Mujie Rao Fulong Shi Zhixuan Rao Jiawei Yang Changkun Song Xiaodong Chen Jianwen Dong Ying yu siyuan yu State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySchool of PhysicsSun Yat-Sen UniversityGuangzhou 510006China Hefei National Laboratory Hefei 230088China

Incorporating topological physics into the realm of quantum photonics holds the promise of developing quantum light emitters with inherent topological robustness and immunity to backscattering.Nonetheless,the deterministic interaction of quantum emitters with topologically nontrivial resonances remains largely unexplored.Here we present a single photon emitter that utilizes a single semiconductor quantum dot,deterministically coupled to a second-order topological corner state in a photonic crystal cavity.By investigating the Purcell enhancement of both single photon count and emission rate within this topological cavity,we achieve an experimental Purcell factor of Fp=3.7.Furthermore,we demonstrate the on-demand emission of polarized single photons,with a second-order autocorrelation function g(2)(0)as low as 0.024±0.103.Our approach facilitates the customization of light-matter interactions in topologically nontrivial environments,thereby offering promising applications in the field of quantum photonics.

关键词： topological quantum deterministic

Stochastic Flexibility Evaluation for Virtual Power Plants by Aggregating Distributed Energy Resources

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CSEE Journal of Power and Energy Systems 2024年第3期10卷 988-999页

作者： siyuan Wang Wenchuan Wu Qizhan Chen Junjie yu Peng Wang Department of Electrical Engineering Tsinghua UniversityBeijing 100084China Zhongshan Power Supply Bureau of the Guangdong Power Grid Corporation Zhongshan 528400China Beijing Qingda Gaoke System Control Company Beijing 102208China CSEE IEEE

To manage a large amount of flexible distributed energy resources(DERs)in the distribution networks,the virtual power plant(VPP)is introduced into the industry.The VPP can optimally dispatch these resources in a cluster manner and provide flexibility for the power system operation as a whole.Most existing studies formulate the equivalent power flexibility of the aggregating DERs as deterministic optimization models without considering their uncertainties.In this paper,we introduce the stochastic power flexibility range(PFR)and timecoupling flexibility(TCF)to describe the power flexibility of VPP.In this model,both operational constraints and the randomness of the DERs’output are incorporated,and a combined model and data-driven solution is proposed to obtain the stochastic PFR,TCF,and cost function of VPP.The aggregating model can be easily incorporated into the optimization model for the power system operator or market bidding,considering uncertainties.Finally,a numerical test is performed.The results show that the proposed model not only has higher computational efficiency than the scenario-based methods but also achieves more economic benefits.

关键词： Chance constrained optimization combined model and data-driven stochastic power flexibility virtual power plant

Mesenchymal stromal cells modulate unfolded protein response and preserve β-cell mass in type 1 diabetes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

BIOCELL 2024年第7期48卷 1115-1126页

作者： siyuan LIU yuAN ZHAO yu yu DOU YE QIAN WANG ZHAOYAN WANG ZUO LUAN Department of Pediatrics The Sixth Medical CenterChinese PLA General HospitalBeijing100037China

Introduction:Transplantation of mesenchymal stromal cells(MSCs)is a promising therapy for type 1 diabetes(T1D).However,whether the infused MSCs affect the endoplasmic reticulum stress or subsequent unfolded protein response inβcells remains unclear.Methods:To investigate this,we induced early-onset T1D in non-obese diabetic mice using streptozotocin.Subsequently,T1D mice were randomly assigned to receive either MSCs or phosphate-buffered saline.We observed the in vivo homing of MSCs and assessed their effectiveness by analyzing blood glucose levels,body weight,histopathology,pancreatic protein expression,and serum levels of cytokines,proinsulin,and C-peptide.Results:Infused MSCs were found in the lungs,liver,spleen,and pancreas of T1D mice.They exhibited various effects,including reducing blood glucose levels,regulating immunity,inhibiting inﬂammation,increasingβ-cell areas,and reducing the expression of key proteins in the unfolded protein response pathway.Fasting serum proinsulin and C-peptide levels were signiﬁcantly higher in the MSCs treatment group than in the T1D model group.However,there was no signiﬁcant difference in the biomarker ofβ-cell endoplasmic reticulum stress,the ratio of fasting serum proinsulin to C-peptide,between the two groups.Conclusion:Ourﬁndings reveal that MSCs infusion does not alleviate endoplasmic reticulum stress inβcells directly but modulates the unfolded protein response pathway to preserveβ-cell mass and function in T1D mice.

关键词： Type 1 diabetes Mesenchymal stromal cells Endoplasmic reticulum stress Unfolded protein response Non-obese diabetic mice

Efficient and rapid capture of uranium(VI)in wastewater via multiamine modified b-cyclodextrin porous polymer

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Chemical Engineering 2024年第4期68卷 144-155页

作者： Xing Zhong yubin Tan siyuan Wu Caixia Hu Kai Guo Yongchuan Wu Neng yu Mingyang Ma Ying Dai School of Chemistry and Materials Science East China University of TechnologyNanchang 330013China

It is quite important to ensure the safety and sustainable development of nuclear energy for the treatment of radioactive wastewater.To treat radioactive wastewater efficiently and rapidly,two multi-amine b-cyclodextrin polymers(diethylenetriamine b-cyclodextrin polymer(DETA-TFCDP)and triethylenetetramine b-cyclodextrin polymer(TETA-TFCDP))were prepared and applied to capture uranium.Results exhibited that DETA-TFCDP and TETA-TFCDP displayed the advantages of high adsorption amounts(612.2 and 628.2 mg·g^(-1),respectively)and rapid adsorption rates,which can reach(88±1)%of their equilibrium adsorption amounts in 10 min.Moreover,the adsorbent processes of DETA-TFCDP and TETATFCDP on uranium(VI)followed the Langmuir model and pseudo-second-order model,stating they were mainly chemisorption and self-endothermic.Besides,TETA-TFCDP also showed excellent selectivity in the presence of seven competing cations and could be effectively reused five times via Na2CO_(3)as the desorption reagent.Meanwhile,X-ray photoelectron spectroscopy and Fourier transform infrared spectroscopy illustrated that the enriched multi-amine groups and oxygen-containing functional groups on the surface of TETA-TFCDP were the main active sites for capturing uranium(VI).Hence,multi-amine b-cyclodextrin polymers are a highly efficient,rapid,and promising adsorbent for capturing uranium(VI)from radioactive wastewater.

关键词： Adsorption Waste water Pollution Uranium(VI) b-Cyclodextrin

维普期刊数据库博看期刊

Network pharmacology and subsequent experimental validation reveal the synergistic myocardial protection mechanism of Salvia miltiorrhiza Bge.and Carthamus tinctorius L.

在线全文

学校读者我要写书评

暂无评论

Journal of Traditional Chinese Medical Sciences 2024年第1期11卷 44-54页

作者： Linying Zhong Ling Dong Jing Sun Jie Yang Zhiying yu Ping He Bo Zhu yuxin Zhu siyuan Li Wenjuan Xu School of Life Sciences Bejing University of Chinese MedicineBeijing 102488China School of Chinese Materia Medica Beijing University of Chinese MedicineBejing 102488China

Objective:To reveal the molecular mechanism underlying the compatibility of Salvia miltiorrhiza Bge(S.miltiorrhiza,Dan Shen)and C.tinctorius L.(C.tinctorius,Hong Hua)as an herb pair through network pharmacology and subsequent experimental validation.Methods:Network pharmacology was applied to construct an active ingredient-efficacy target-disease protein network to reveal the unique regulation pattern of s.miltiorrhiza and C.tinctorius as herb pair.Molecular docking was used to verify the binding of the components of these herbs and their potential targets.An H9c2 glucose hypoxia model was used to evaluate the efficacy of the components and their synergistic effects,which were evaluated using the combination index.Western blot was performed to detect the protein expression of these targets.Results:Network pharmacology analysis revealed 5 pathways and 8 core targets of s.miltiorrhiza and C.tinctorius in myocardial protection.Five of the core targets were enriched in the hypoxia-inducible factor-1(HIF-1)signaling pathway.S.miltiorrhiza-C.tinctorius achieved vascular tone mainly by regulating the target genes of the HIF-1 pathway.As an upstream gene of the HIF-1 pathway,STAT3 can be activated by the active ingredients cryptotanshinone(Ctan),salvianolic acid B(Sal.B),and myricetin(Myric).Cell experiments revealed that Myric,Sal.B,and Ctan also exhibited synergistic myocardial protective activity.Molecular docking verified the strong binding of Myric,Sal.B,and Ctan to STAT3.Western blot further showed that the active ingredients synergistically upregulated the protein expressionof STAT3.Conclusion:The pharmacodynamic transmission analysis revealed that the active ingredients of S.miltiorrhiza and C.tinctorius can synergistically resist ischemia through various targets and pathways.This study provides a methodological reference for interpreting traditional Chinese medicine compatibility.

关键词： S.miltiorrhiza-C.tinctorius herb pair Compatibilitymechanism Networkpharmacology Multipletargeteffect Myocardial protection

All-optical functions based on semiconductor ring lasers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Optics Letters 2010年第9期8卷 918-923页

作者： siyuan yu Department of Electronic and Electrical Engineering University of Bristol Bristol BS8 1 UB UK Visiting State Key Laboratory of ASIC and Department of Communications Engineering School of Information Science and Engineering Fudan University Shanghai 200433 China

Semiconductor ring laser （SRL） has been shown to possess robust bistability between its two possible directions, i.e., clockwise （cw） and counter-clockwise （ccw） lasing, routinely demonstrating directional extinction ratio （DER） of 〉 25 dB. In this paper, experimental schemes and results using the SRL as a universal photonic digital element to form all-optical logic, memory, and signal processing circuits are summarized. It is demonstrated that the SRL can be used for both combinatorial and sequential logic functions, and as all-optical regeneration devices. Furthermore, it is shown that a SRL logic circuit can be all-optically reconfigured to perform different all-optical logic functions.

关键词： Digital circuits Ring lasers Semiconductor lasers Signal processing Switching circuits

维普期刊数据库

High-performance distributed feedback quantum dot lasers with laterally coupled dielectric gratings

在线全文

学校读者我要写书评

暂无评论

Photonics Research 2022年第5期10卷 1271-1279页

作者： ZHUOHUI YANG ZHENGQING DING LIN LIU HANCHENG ZHONG SHENG CAO XINZHONG ZHANG SHIZHE LIN XIAOYING HUANG HUADI DENG YING yu siyuan yu State Key Laboratory of Optoelectronic Materials and Technologies School of Electronics and Information TechnologySun Yat-sen UniversityGuangzhou 510275China

The combination of grating-based frequency-selective optical feedback mechanisms,such as distributed feedback(DFB)or distributed Bragg reflector(DBR)structures,with quantum dot(QD)gain materials is a main approach towards ultrahigh-performance semiconductor lasers for many key novel applications,as either stand-alone sources or on-chip sources in photonic integrated circuits.However,the fabrication of conventional buried Bragg grating structures on GaAs,GaAs/Si,GaSb,and other material platforms has been met with major material regrowth difficulties.We report a novel and universal approach of introducing laterally coupled dielectric Bragg gratings to semiconductor lasers that allows highly controllable,reliable,and strong coupling between the grating and the optical mode.We implement such a grating structure in a low-loss amorphous silicon material alongside GaAs lasers with InAs/GaAs QD gain layers.The resulting DFB laser arrays emit at pre-designed 0.8 THz local area network wavelength division multiplexing frequency intervals in the 1300 nm band with record performance parameters,including sidemode suppression ratios as high as 52.7 dB,continuous-wave output power of 26.6 mW(room temperature)and 6 mW(at 55℃),and ultralow relative intensity noise(RIN)of<-165 dB/Hz(2.5-20 GHz).The devices are also capable of isolator-free operating under very high external reflection levels of up to-12.3 dB while maintaining high spectral purity and ultralow RIN qualities.These results validate the novel laterally coupled dielectric grating as a technologically superior and potentially cost-effective approach for fabricating DFB and DBR lasers free of their semiconductor material constraints,which are thus universally applicable across different material platforms and wavelength bands.

关键词： dielectric performance quantum

维普期刊数据库

A High Spatiotemporal Iontronic Single-Cell Viscometer

在线全文

学校读者我要写书评

暂无评论

Research 2022年第4期2022卷 239-247页

作者： Tianyang Zhang siyuan yu Bing Wang Yitong Xu Xiaomei Shi Weiwei Zhao Dechen Jiang Hongyuan Chen Jingjuan Xu State Key Laboratory of Analytical Chemistry for Life Science School of Chemistry and Chemical EngineeringNanjing UniversityNanjing210023China

Ideal single-cell viscometer has remained unachieved,leaving a gap in current palette of single-cell nanotools.Information of single-cell viscosity could contribute to our knowledge of fundamental biological processes,e.g.,mass diffusion,biochemical interaction,and cellular responses to many diseases and pathologies.Although advances have been made to this end,existing methods generally suffer from limitations,e.g.,low spatiotemporal resolution.Here,we describe a high spatiotemporal iontronic single-cell viscometer that operates upon a patch clamp integrated with double-barreled nanopores separated by a septum of ca.32 nm.The system enables reversible electroosmotic manipulation of the adjacent small fluid bridging two nanopores,the viscous alternation of which could be sensitively monitored by the ionic responses.In practical cellular studies,significantly,our findings reveal not only the less deviated medium viscosities than those of lysosomes and mitochondria but also the highest viscosities in the near-nuclear region than those of mitochondrion-dense and lysosome-dense regions.This work has provided an accessible single-cell viscometer and enriched the armory of single-cell nanotools.

关键词： pores viscosity bridging