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Transient breathing dynamics during extinction of dissipative solitons in mode‑locked fiber lasers

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Frontiers of Optoelectronics 2024年第1期17卷 9-19页

作者： Zichuan Yuan Si Luo Ke Dai Xiankun Yao Chenning Tao Qiang Ling Yusheng Zhang Zuguang Guan Daru Chen Yudong Cui Hangzhou Institute of Advanced Studies Zhejiang Normal UniversityHangzhou 311231China State Key laboratory of Modern optical Instrumentation College of Optical Science and EngineeringZhejiang UniversityHangzhou 310027China Wuhan National laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074China Key laboratory of optical Information Detection and Display Technology of Zhejiang Zhejiang Normal UniversityJinhua 321004China School of physics Northwest UniversityXi’an 710127China

The utilization of the dispersive Fourier transformation approach has enabled comprehensive observation of the birth process of dissipative solitons in fiber ***,there is still a dearth of deep understanding regarding the extinction process of dissipative *** this study,we have utilized a combination of experimental and numerical techniques to thoroughly examine the breathing dynamics of dissipative solitons during the extinction process in an Er-doped mode-locked fiber *** results demonstrate that the transient breathing dynamics have a substantial impact on the extinction stage of both steady-state and breathing-state dissipative *** duration of transient breathing exhibits a high degree of sensitivity to variations in pump *** simulations are utilized to produce analogous breathing dynamics within the framework of a model that integrates equations characterizing the population inversion in a mode-locked *** results corroborate the role of Q-switching instability in the onset of breathing ***,these findings offer new possibilities for the advancement of various operational frameworks for ultrafast lasers.

关键词： Breathing soliton Fiber laser Dispersive Fourier transform Q-switched instability

From Topological Nodal-Line Semimetals to Quantum Spin Hall Insulators in Tetragonal SnX Monolayers(X=F,Cl,Br,I)

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Chinese physics Letters 2024年第6期41卷 98-111页

作者：朱晔赵宝薛阳徐玮徐文婷杨中芹 State Key laboratory of Surface physics Key Laboratory of Computational Physical Sciences(MOE)and Department of PhysicsFudan UniversityShanghai 200433China Shandong Key laboratory of optical Communication Science and Technology School of Physics Science and Information TechnologyLiaocheng UniversityLiaocheng 252059China School of physics East China University of Science and TechnologyShanghai 200237China Shanghai Qi Zhi Institute Shanghai 200030China

Two-dimensional(2D)topological materials have recently garnered significant interest due to their profound physical properties and promising applications for future quantum *** various topological states within one type of materials is,however,seldom *** on first-principles calculations and tightbinding models,we investigate topological electronic states in a novel family of 2D halogenated tetragonal stanene(T-SnX,X=F,Cl,Br,I).All the four monolayers are found to be unusual topological nodal-line semimetals(NLSs),protected by a glide mirror *** spin-orbit coupling(SOC)is turned on,T-SnF and TSnCl are still ascertained as topological NLSs due to the remaining band inversion,primarily composed of Sn pxy orbitals,while T-Sn Br and T-SnI become quantum spin Hall *** phase transition is ascribed to moving up in energy of Sn s orbitals and increasing of SOC *** topology origin in the materials is uniformly rationalized through elementary band *** robust and diverse topological states found in the 2D T-SnX monolayers position them as an excellent material platform for development of innovative topological electronics.

关键词： topological metals quantum

Ultrasound sensing with optical microcavities

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Light(Science & Applications) 2024年第8期13卷 1487-1511页

作者： Xuening Cao Hao Yang Zu-Lei Wu Bei-Bei Li Beijing National laboratory for Condensed Matter physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China School of optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074China Songshan Lake Materials laboratory Dongguan 523808 GuangdongChina

Ultrasound sensors play an important role in biomedical imaging,industrial nondestructive inspection,*** ultrasound sensors that use piezoelectric transducers face limitations in sensitivity and spatial resolution when miniaturized,with typical sizes at the millimeter to centimeter *** overcome these challenges,optical ultrasound sensors have emerged as a promising alternative,offering both high sensitivity and spatial *** particular,ultrasound sensors utilizing high-quality factor(Q)optical microcavities have achieved unprecedented performance in terms of sensitivity and bandwidth,while also enabling mass production on silicon *** this review,we focus on recent advances in ultrasound sensing applications using three types of optical microcavities:Fabry-Perot cavities,π-phase-shifted Bragg gratings,and whispering gallery mode *** provide an overview of the ultrasound sensing mechanisms employed by these microcavities and discuss the key parameters for optimizing ultrasound ***,we survey recent advances in ultrasound sensing using these microcavity-based approaches,highlighting their applications in diverse detection scenarios,such as photoacoustic imaging,ranging,and particle *** goal of this review is to provide a comprehensive understanding of the latest advances in ultrasound sensing with optical microcavities and their potential for future development in high-performance ultrasound imaging and sensing technologies.

关键词： optical millimeter offering

Tunable artificial plasmonic nanolaser with wide spectrum emission operating at room temperature

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Chinese physics B 2024年第5期33卷 466-471页

作者：周鹏郭佳琦梁琨金磊梁熊玉李俊强邓绪彦秦建宇张家森于丽 State Key laboratory of Information Photonics and optical Communications School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China State Key laboratory for Artificial Microstructures and Mesoscopic physics School of PhysicsPeking UniversityBeijing 100876China Peking University Yangtze Delta Institute of Optoelectronics Peking UniversityNantong 226010China

With the rapid development of information and communication technology,a key objective in the field of optoelectronic integrated devices is to reduce the nano-laser size and energy *** nanolasers are unable to exceed the diffraction limit and typically exhibit low modulation rates of several *** contrast,plasmonic nanolaser utilizes highly confined surface plasmon polariton(SPP)mode that can exceed diffraction limit and their strong Purcell effect can accelerate the modulation rates to several ***,we propose a parametrically tunable artificial plasmonic nanolasers based on metal–insulator–semiconductor–insulator–metal(MISIM)structure,which demonstrates its ability to compress the mode field volume toλ/*** the pump power increases,the proposed artificial plasmonic nanolaser exhibits 20-nm-wide output ***,we investigate the effects of various cavity parameters on the nanolaser’s output threshold,offering potentials for realizing low-threshold artificial plasmonic ***,we observe a blue shift in the center wavelength of the nanolaser output with thinner gain layer thickness,predominantly attributed to the increased exciton–photon coupling *** work brings inspiration to several areas,including spaser-based interconnects,nano-LEDs,spontaneous emission control,miniaturization of photon condensates,eigenmode engineering of plasmonic nanolasers,and optimal design driven by artificial intelligence(AI).

关键词： surface plasmon polaritons nanolaser ultrafast MISIM

Alcohol-dispersed polymer complex as an effective and durable interface modifier for n-i-p perovskite solar cells

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Journal of Energy Chemistry 2024年第6期93卷 243-252,I0007页

作者： Chang Shi Jiangling Li Shuping Xiao Ziyi Wang Wuchen Xiang Rui Wu Yang Liu Yinhua Zhou Weijun Ke Guojia Fang Pingli Qin Hubei Key laboratory of optical Information and Pattern Recognition Wuhan Institute of TechnologyWuhan 430205HubeiChina Wuhan National laboratory for Optoelectronics Huazhong University of Science and TechnologyWuhan 430074HubeiChina School of physics and Technology Key Laboratory of Artificial Micro-and Nano-structures of the Ministry of Education and School of Physics and TechnologyWuhan UniversityWuhan 430072HubeiChina

Abundant interfacial defects remain a significant challenge that hampers both the efficiency and stability of perovskite solar cells(PSCs).Herein,an alcohol-dispersed conducting polymer complex,denoted as PEDOT:F(Poly(3,4-ethylene dioxythiophene):Perfluorinated sulfonic acid ionomers),is introduced into the interface between perovskite and hole transporting layer in regular-structured ***:F serves as a multi-functional interface layer(filling grain boundaries and covering perovskite's grain-surface)to achieve a robust interaction with organic groups within perovskites,which could induce a structural transformation of PEDOT to increase its conductivity for the efficient ***,the strong interaction between PEDOT and perovskites could promote an effective coupling of undercoordinated Pb~(2+)ions with the lone electron pairs near O&S atoms in PEDOT molecules,thereby enhancing defect ***,PEDOT:F with inherent hydrophobic properties prevents effectively moisture invasion into perovskites for the improved long-term stability of the ***,the PEDOT:F-based PSCs achieved a champion efficiency of 24.81%,and maintained ca.92%of their initial efficiency after 7680 h of storage in a dry air environment,accompanied by the enhanced photothermal stability.

关键词： Alcohol-dispersed conducting polymer complex Interface passivation Grain boundaries Device stability Perovskite solar cells

Magnetically controllable multimode interference in topological photonic crystals

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Light(Science & Applications) 2024年第5期13卷 998-1005页

作者： Weiyuan Tang Mudi Wang Shaojie Ma Che Ting Chan Shuang Zhang New Cornerstone Science laboratory Department of PhysicsThe University of Hong KongHong KongChina. Department of physics The Hong Kong University of Science and TechnologyHong KongChina. Department of optical Science and Engineering Fudan UniversityShanghai 200433China

Topological photonic insulators show promise for applications in compact integrated photonic circuits due to their ability to transport light robustly through sharp *** number of topological edge states relies on the difference between the bulk Chern numbers across the boundary,as dictated by the bulk edge *** interference among multiple topological edge modes in topological photonics systems may allow for controllable functionalities that are particularly desirable for constructing reconfigurable photonic *** this work,we demonstrate magnetically controllable multimode interference based on gyromagnetic topological photonic insulators that support two unidirectional edge modes with different *** successfully achieve controllable power splitting in experiments by engineering multimode interference with the magnetic field intensity or the frequency of *** work demonstrates that manipulating the interference among multiple chiral edge modes can facilitate the advancement of highly efficient and adaptable microwave devices.

关键词： multimode controllable microwave

Localization effect in single crystal of RuAs2

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Chinese physics B 2024年第4期33卷 620-625页

作者：易哲铠刘琪光双魁徐升岳小宇梁慧李娜周颖吴丹丹孙燕李秋菊程鹏夏天龙孙学峰王义炎 Anhui Key laboratory of Magnetic Functional Materials and Devices Institute of Physical Science and Information TechnologyAnhui University Department of physics and Key laboratory of Strongly-Coupled Quantum Matter physics (CAS) University of Science and Technology of China Department of physics and Beijing Key laboratory of Opto-electronic Functional Materials & Micro-nano Devices Renmin University of China School of optical and Electronic Information Suzhou City University School of physics and Optoelectronic Engineering Anhui University Collaborative Innovation Center of Advanced Microstructures Nanjing University

We report the magnetotransport and thermal properties of RuAs2single crystal. RuAs2exhibits semiconductor behavior and localization effect. The crossover from normal state to diffusive transport in the weak localization（WL） state and then to variable range hopping（VRH） transport in the strong localization state has been observed. The transitions can be reflected in the measurement of resistivity and Seebeck coefficient. Negative magnetoresistance（NMR） emerges with the appearance of localization effect and is gradually suppressed in high magnetic field. The temperature dependent phase coherence length extracted from the fittings of NMR also indicates the transition from WL to VRH. The measurement of Hall effect reveals an anomaly of temperature dependent carrier concentration caused by localization effect. Our findings show that RuAs2is a suitable platform to study the localized state.

关键词： weak localization variable range hopping RuAs_2 single crystal

Broadband,Polarization-Sensitive,and Self-Powered High-Performance Photodetection of Hetero-Integrated MoS_(2)on Lithium Niobate

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Research 2024年第2期2023卷 203-212页

作者： Zhigang He Heyuan Guan Xijie Liang Junteng Chen Manyan Xie Kaiwen Luo Ran An Liang Ma Fengkai Ma Tiefeng Yang Huihui Lu Guangdong Provincial Key laboratory of optical Fiber Sensing and Communications Jinan UniversityGuangzhou 510632China Key laboratory of Optoelectronic Information and Sensing Technologies of Guangdong Higher Education Institutes Jinan UniversityGuangzhou 510632China institute of Fluid physics China Academy of Engineering PhysicsMianyang 621900China College of physics and Electronic Engineering Hengyang Normal UniversityHengyang 421008China

High-performance photodetectors hold promising potential in optical communication and imaging ***,conventional counterparts are suffering narrow detection range,high power consumption,and poor polarization *** originating from switchable polarization in ferroelectrics can be used to optimize the photo-to-electric procedure and improve the photodetection *** this regard,we constructed a configuration by integrating 2-dimensional molybdenum disulfide(MoS_(2))with ferroelectric lithium niobate(LiNbO_(3)),resulting in the MoS_(2)/LiNbO_(3)heterostructured *** from the pyroelectric effect of LiNbO_(3),the limitation of bandgap on the detection range can be broken,thus broadening the response band of the detector to 365 to 1,064 nm,as well as enabling the self-powered ***,high carrier mobility and decent light absorbance of MoS_(2)introduce robust light-matter interactions with the underlying LiNbO_(3),leading to ultrafast rise/fall times of≈150μs/250μs and switching ratios of up to≈***,the highest responsivity,specific detectivity,and external quantum efficiency achieved were 17.3 A·W^(-1),4.3×10^(11)Jones,and 4,645.78%,***,because of the anisotropy of the spontaneous-polarized LiNbO_(3)substrate,the photocurrent of the device achieved a dichroic ratio of 7.42,comparing favorably to most MoS_(2)-based *** work demonstrates the integration potential between ferroelectric LiNbO_(3)and 2-dimensional materials for high-performance photodetection.

关键词： polarization ferroelectric Polarization

New speckle pattern interferometry for precise in situ deformation measurements

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Chinese Optics Letters 2024年第1期22卷 34-40页

作者：章如月 Yu Fu 缪泓 CAS Key laboratory of Mechanical Behavior and Design of Materials Department of Modern MechanicsUniversity of Science and Technology of ChinaHefei 230027China Shenzhen Key laboratory of Intelligent optical Measurement and Detection College of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhen 518060China

A new electronic speckle pattern interferometry method is proposed to realize in situ deformation *** feature of the method is the combination of a high-speed camera and multiple laser Doppler vibrometers(LDVs)for synchronous *** high-speed camera is used to record and select effective interferograms,while the LDVs are used to measure the rigid body displacement caused by vibrations.A series of effective interferograms with known shifted phase values are obtained to calculate the deformation *** experimental results show that the method performs well in measuring static and dynamic deformations with high accuracy in vibrating environments.

关键词： speckle pattern interferometry laser Doppler vibrometers in situ deformation measurements