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Innovation in metamaterials and beyond:an interview with *** Zhang

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Advanced Photonics 2022年第2期4卷 3-6页

作者： ren-min ma Peking University School of PhysicsState Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronicsBeijingChina Collaborative Innovation Center of Quantum matter BeijingChina

ren-min ma: Prof. Zhang, you have made a series of groundbreaking discoveries in metamaterials. How did you get started in this field?Xiang Zhang: The research in metamaterials started about two decades ago. We are ve... 详细信息

关键词： interview breaking Xiang

Lasing-enhanced surface plasmon resonance spectroscopy and sensing

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Photonics Research 2021年第9期9卷 1699-1714页

作者： ZHE ZHANG LEONA NEST SUO WANG SI-YI WANG ren-min ma State Key Laboratory for Mesoscopic Physics School of PhysicsPeking UniversityBeijing 100871China Department of Physics Free University BerlinBerlin 14195Germany Frontiers Science Center for Nano-optoelectronics&Collaborative Innovation Center of Quantum matter Beijing 100871China Yangtze Delta Institute of Optoelectronics Peking UniversityNantong 226010China

Surface plasmon resonance(SPR)sensors are a prominent means to detect biological and chemical analytes and to investigate biomolecular interactions in various ***,the performance of SPR sensors is ultimately limited by ohmic loss,which substantially weakens the resonance signal and broadens the response *** studies have shown that ohmic loss can be fully compensated in plasmonic nanolasers,which leads to a novel class of lasing-enhanced surface plasmon resonance(LESPR)sensors with improved sensing *** this paper,we detail the underlying physical mechanisms of LESPR sensors and present their implementation in various sensing *** review recent progress on their applications,particularly for refractive index sensing,gas detection and biological imaging,labeling,tracking,and *** then summarize the review and highlight remaining challenges of LESPR sensing technology.

关键词： technology. resonance surface

Ten years of spasers and plasmonic nanolasers

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Light(Science & Applications) 2020年第1期9卷 1133-1153页

作者： Shaimaa I.Azzam Alexander V.Kildishev ren-min ma Cun-Zheng Ning Rupert Oulton Vladimir M.Shalaev mark I.Stockman Jia-Lu Xu Xiang Zhang School of Electrical&Computer Engineering and Birck Nanotechnology Center Purdue UniversityWest LafayetteIN 47907USA Purdue Quantum Science and Engineering Institute Purdue UniversityWest LafayetteIN 47907USA State Key Lab for Mesoscopic Physics and School of Physics Peking UniversityBeijingChina Frontiers Science Center for Nano-optoelectronics&Collaborative Innovation Center of Quantum matter BeijingChina Department of Electronic Engineering and International Center for Nano-Optoelectronics Tsinghua University100084 BeijingChina School of Electrical Computerand Energy EngineeringArizona State UniversityTempeAZ 85287USA The Blackett Laboratory Imperial College LondonSouth KensingtonLondon SW72AZUK Center for Nano-Optics(CeNO)and Department of Physics and Astronomy Georgia State UniversityAtlantaGA 30303USA Nanoscale Science and Engineering Center University of CaliforniaBerkeleyBerkeleyCA 94720USA Faculties of Sciences and Engineering University of Hong KongHong KongChina

Ten years ago,three teams experimentally demonstrated the first spasers,or plasmonic nanolasers,after the spaser concept was first proposed theoretically in *** overview of the significant progress achieved over the last 10 years is presented here,together with the original context of and motivations for this *** a general introduction,we first summarize the fundamental properties of spasers and discuss the major motivations that led to the first demonstrations of spasers and *** is followed by an overview of crucial technological progress,including lasing threshold reduction,dynamic modulation,room-temperature operation,electrical injection,the control and improvement of spasers,the array operation of spasers,and selected applications of single-particle *** prospects are presented in relation to several directions of development,including further miniaturization,the relationship with Bose-Einstein condensation,novel spaser-based interconnects,and other features of spasers and plasmonic lasers that have yet to be realized or challenges that are still to be overcome.

关键词： lasers overcome operation

Twisted lattice nanocavity with theoretical quality factor exceeding 200 billion

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Fundamental Research 2023年第4期3卷 537-543页

作者： ren-min ma Hong-Yi Luan Zi-Wei Zhao Wen-Zhi mao Shao-Lei Wang Yun-Hao Ouyang Zeng-Kai Shao State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-Optoelectronics School of PhysicsPeking UniversityBeijing 100871China Collaborative Innovation Center of Quantum matter Beijing 100871China Peking University Yangtze Delta Institute of Optoelectronics Nantong 226010JiangsuChina National Biomedical Imaging Center Peking UniversityBeijing 100871China

Simultaneous localization of light to extreme spatial and spectral scales is of high importance for testing fundamental physics and various ***,there is a longstanding trade-off between localizing a light field in space and in *** we discover a new class of twisted lattice nanocavities based on mode locking in momentum *** twisted lattice nanocavity hosts a strongly localized light field in a 0.048𝜆3 mode volume with a quality factor exceeding 2.9×1011(∼250𝜇s photon lifetime),which presents a record high figure of merit of light localization among all reported optical *** on the discovery,we have demonstrated silicon-based twisted lattice nanocavities with quality factor over 1 *** result provides a powerful platform to study light-matter interaction in extreme conditions for tests of fundamental physics and applications in nanolasing,ultrasensing,nonlinear optics,optomechanics and quantum-optical devices.

关键词： Nanocavities Twisted lattice Quality factor Mode volume Flatband Mode coupling

Exosomes:the next-generation therapeutic platform for ischemic stroke

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Neural Regeneration Research 2025年第5期20卷 1221-1235页

作者： Wenjing Yin Hongyin ma Yang Qu Jiaxin ren Yingying Sun Zhen-Ni Guo Yi Yang Stroke Center Department of NeurologyFirst Hospital of Jilin UniversityChangchunJilin ProvinceChina Neuroscience Research Center Department of NeurologyFirst Hospital of Jilin UniversityChangchunJilin ProvinceChina

Current therapeutic strategies for ischemic stroke fall short of the desired objective of neurological functional ***,there is an urgent need to develop new methods for the treatment of this *** are natural cell-derived vesicles that mediate signal transduction between cells under physiological and pathological *** have low immunogenicity,good stability,high delivery efficiency,and the ability to cross the blood–brain *** physiological properties of exosomes have the potential to lead to new breakthroughs in the treatment of ischemic *** rapid development of nanotechnology has advanced the application of engineered exosomes,which can effectively improve targeting ability,enhance therapeutic efficacy,and minimize the dosages *** in technology have also driven clinical translational research on *** this review,we describe the therapeutic effects of exosomes and their positive roles in current treatment strategies for ischemic stroke,including their antiinflammation,anti-apoptosis,autophagy-regulation,angiogenesis,neurogenesis,and glial scar formation reduction ***,it is worth noting that,despite their significant therapeutic potential,there remains a dearth of standardized characterization methods and efficient isolation techniques capable of producing highly purified *** optimization strategies should prioritize the exploration of suitable isolation techniques and the establishment of unified workflows to effectively harness exosomes for diagnostic or therapeutic applications in ischemic ***,our review aims to summarize our understanding of exosome-based treatment prospects in ischemic stroke and foster innovative ideas for the development of exosome-based therapies.

关键词： blood–brain barrier electroacupuncture engineering exercise exosomes ischemic stroke mesenchymal stem cells microglia neuroprotection stents

Small extracellular vesicles derived from human induced pluripotent stem cell-differentiated neural progenitor cells mitigate retinal ganglion cell degeneration in a mouse model of optic nerve injury

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Neural Regeneration Research 2025年第2期20卷 587-597页

作者： Tong Li Hui-min Xing Hai-Dong Qian Qiao Gao Sheng-Lan Xu Hua ma Zai-Long Chi State Key Laboratory of Ophthalmology Optometry and Visual ScienceEye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina National Clinical Research Center for Ocular Diseases Eye HospitalWenzhou Medical UniversityWenzhouZhejiang ProvinceChina

Several studies have found that transplantation of neural progenitor cells(NPCs)promotes the survival of injured ***,a poor integration rate and high risk of tumorigenicity after cell transplantation limits their clinical *** extracellular vesicles(sEVs)contain bioactive molecules for neuronal protection and *** studies have shown that stem/progenitor cell-derived sEVs can promote neuronal survival and recovery of neurological function in neurodegenerative eye diseases and other eye *** this study,we intravitreally transplanted sEVs derived from human induced pluripotent stem cells(hiPSCs)and hiPSCs-differentiated NPCs(hiPSC-NPC)in a mouse model of optic nerve *** results show that these intravitreally injected sEVs were ingested by retinal cells,especially those localized in the ganglion cell *** with hiPSC-NPC-derived sEVs mitigated optic nerve crush-induced retinal ganglion cell degeneration,and regulated the retinal microenvironment by inhibiting excessive activation of *** analysis further revealed that hiPSC-NPC derived sEVs transported neuroprotective and anti-inflammatory miRNA cargos to target cells,which had protective effects on RGCs after optic nerve *** findings suggest that sEVs derived from hiPSC-NPC are a promising cell-free therapeutic strategy for optic neuropathy.

关键词： exosome miRNA neural progenitor cell neurodegeneration neuroinflammation neuroprotection optic nerve crush optic neuropathy retinal ganglion cell small extracellular vesicles

Study on the orthonormalization eigenstates of αq~3

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Chinese Journal of Lasers 1994年第4期 339-342页

作者： XIA Deyong(Harbin Normal University,Harbin 150080, China)ren min, ma Aiqun (Harbin College,Harbin 150020, China)SHI Weichun (Northeast Forestry University, Harbin 150080, China)

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关键词： orthonormalization eigenstutes q -hose annihilation operator

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单原子微波激射器中光场N阶压缩效应的研究

烟台师范学院学报（自然科学版） 1993年第2期9卷 21-26页

作者：任珉马爱群哈尔滨大学哈尔滨

利用Jaynes-Cummings模型研究单原子微波激射器中光场的N阶压缩效应,得到了该场N阶压缩的一般表达式;详细讨论了初始光场是真空场和n光子光场的N阶压缩的行为.

关键词：单原子微波激射器光场 N阶压缩

Multi-dimensional Bi@C electrocatalyst for Cr3+/Cr2+ redox reaction boosting high-performance iron-chromium flow batteries

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Science China Chemistry 2025年

作者： min Wu mingjun Nan Shumin Liu Caihe Zhong Lin Qiao Huamin Zhang Xiangkun ma Department of materials Science and Engineering Dalian Maritime University Division of Energy Storage Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences

With the increasing demand for energy storage technology, iron-chromium flow batteries（ICFBs） have been widely concerned because of their price advantage. However, the low electrochemical activity of Cr3+/Cr2+redox couples and the side hydrogen evolution reaction limit the industrial application of ICFBs. A multi-dimensional Bi/carbon composite electrocatalyst（Bi@C）for ICFB is designed and prepared to improve the electrochemical activity of Cr3+/Cr2+redox couples. Benefiting by using the Bimetal organic framework（Bi-MOF） with solid matrix as precursors, Bi nanospheres are highly dispersed on the Bi@C electrocatalyst that effectively enhances the electrochemical activity. The special morphology of Bi@C electrocatalyst helps the transfer of electrons and ions, significantly reducing the polarization of battery. Herein, the 3D porous carbon frames accelerate mass transfer, and the 2D carbon nanobelts and carbon layer coating on 0D Bi nanospheres improve the conductivity of Bi nanospheres. Therefore, the ICFB with multi-dimensional Bi@C electrocatalyst exhibits coulombic efficiency of 98.10% and energy efficiency of 79.14% at 140 ma cm-2, which is higher than ICFBs with commercial graphite carbon electrocatalyst and with heat treatment carbon felt. This work provides a simple and economical method to fabricate a high-performance multidimensional Bi@C electrocatalyst for Cr3+/Cr2+redox couples, boosting the development of ICFBs.

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