SPIE/SIOM Pacific Rim Laser Damage最新文献_第9页

Laser-induced damage of high power systems: phenomenology and mechanisms 高功率系统的激光损伤:现象学和机理

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2537106

L. Lamaignère, R. Courchinoux, N. Roquin, R. Parreault, T. Donval

{"title":"Laser-induced damage of high power systems: phenomenology and mechanisms","authors":"L. Lamaignère, R. Courchinoux, N. Roquin, R. Parreault, T. Donval","doi":"10.1117/12.2537106","DOIUrl":"https://doi.org/10.1117/12.2537106","url":null,"abstract":"Laser damage resistance is a key factor for the operation and the improvement of high power laser systems. Up today laser damage performance of optical components is mainly a defect related material characteristic. Metrology procedures have been developed to realize repeatable and accurate measurements of surface damage density due to nanosecond pulses. These measurement techniques were used to guide the improvement of surface damage resistance. Fractures must be eliminated from surfaces, in order not to suffer a damage growth phenomenon, whose exponential character will reduce the optical lifetime. High intensity hot spots due to beam modulations, spatial and/or temporal modulations, can also cause surface damage. Specific set-ups and experiments were carried out that allowed us to analyze and explain these phenomena: damage initiation mechanisms, damage growth and beam propagation inside the optical components. The presentation aims to highlight relevant progress on these topics (1) initiation mechanisms due to defects show two phases: a first incubation phase followed by the expansion one of the damage site ; it appears also that damage diameters are well correlated with the expansion fluence, (2) a refined bulk observation coupled to a fractal analysis allow the quantification of bulk damage and therefore to explain the laser damage growth and its dependence on beam parameters like pulse length and fluence (3) non-linear amplification of phase and amplitude modulations lead to the amplification of the spatial pre-existing small scale modulations that increase the laser energy density locally and finally the number of damage sites. The whole of results, damage initiation, damage growth and beam propagation, is discussed to the light of the laser damage observed on LMJ optics.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130249216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Effect of temperature on optical properties of CeOX film being irradiated by Co60 prepared by RF magnetron sputtering 温度对射频磁控溅射制备Co60辐照CeOX薄膜光学性能的影响

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2535797

Hui Wang, Bo Fu, Zaikui Xiang

引用次数: 0

Laser damage and damage performance caused by near-field of final optics assembles for high power laser system 高功率激光系统最终光学组件近场激光损伤及损伤性能

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2540080

Yajing Guo, Mingying Sun, Zhaoyang Jiao, Chong Liu, Xiuqing Jiang, B. Zhu, Jianqiang Zhu

引用次数: 0

Third-order nonlinear optical response of enzothiazole derivative doped Polymethyl methacrylate C18H15N3SFe 苯并噻唑衍生物掺杂聚甲基丙烯酸甲酯C18H15N3SFe的三阶非线性光学响应

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2539334

J. Zong, Chenghui Jang, Jiahuan He, Yanmin Zhang, Hua-song Liu, Yinglin Song

引用次数: 0

Efficient broadband light absorption enhancement in InP/ZnO core-shell nanocone arrays for photovoltaic application 光电应用中InP/ZnO核壳纳米锥阵列的高效宽带光吸收增强

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2536570

Zongyi Zhang, Yonggang Wu, Xuefei Qin, Zihuan Xia, Jian Zhou

{"title":"Efficient broadband light absorption enhancement in InP/ZnO core-shell nanocone arrays for photovoltaic application","authors":"Zongyi Zhang, Yonggang Wu, Xuefei Qin, Zihuan Xia, Jian Zhou","doi":"10.1117/12.2536570","DOIUrl":"https://doi.org/10.1117/12.2536570","url":null,"abstract":"Nanowire solar cells are of great interests due to their promising prospects as nano-electronic power sources. Here, we propose a standing semiconductor-dielectric core-shell nanocone array (CSNCA). We find that the CSNCA structure can not only concentrate the incident light into the structure, but also confine most of the concentrated light to the semiconductor (InP) core region, which enhances remarkably the light absorption of the more material-saving semiconductor core. Thanks to the gradient of diameter size along the axial in cone, incident light of different wavelengths can be maximally coupled into the core. We find guided resonance features along the radial and FP-resonant features along the axial by analyzing the electric field patterns at the absorption spectrum peaks. The CSNCA can support multiple higherorder HE modes, in comparison to the bare nanocone array (BNCA). Interaction of the adjacent higher-order HE modes results in broadband light absorption enhancement in the solar radiation spectrum. Carrier generation rates (G) have also been studied when the electrical part is discussed. CSNCAs show a unique advantage in G distribution. Results based on detailed balance analysis demonstrate that the core-shell design gives rise to higher short-circuit current and open-circuit voltage, and thus higher power conversion efficiency. This advantage is more apparent in thin structures compared with the thick ones. Detailed research is focused on the 1 μm high CSNCAs, and a remarkable enhancement (42.2%) is gained compared with the BNCAs. Our study shows that the CSNCAs can be promising candidates for application in super miniature photodetectors, nanometer power sources and ultra-thin film solar cells.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134079589","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Removal of defect bound exciton in aged monolayer WS2 by laser processing 时效单层WS2中缺陷束缚激子的激光去除

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2539242

Yuxiang Tang, Yizhen Sui, Runlin Miao, Han Li, K. Wei, Hao Hao, Yu Liu, Yuze Hu, Junhu Zhou, Yating Ma, Xiang’ai Cheng, Tian Jiang

{"title":"Removal of defect bound exciton in aged monolayer WS2 by laser processing","authors":"Yuxiang Tang, Yizhen Sui, Runlin Miao, Han Li, K. Wei, Hao Hao, Yu Liu, Yuze Hu, Junhu Zhou, Yating Ma, Xiang’ai Cheng, Tian Jiang","doi":"10.1117/12.2539242","DOIUrl":"https://doi.org/10.1117/12.2539242","url":null,"abstract":"The exciton complexes in two-dimensional materials have long fascinated scientists and researchers for their mechanisms in fundamental photo-physics. And it is well established that the evolution of defect bound excitons in twodimensional semiconducting TMDs brings largely unexplored opportunities for tailoring their optoelectronic properties. Yet thus far, the properties of defect bound excitons of TMDs have been rarely investigated. In this work, the intrinsic properties of defect bound excitons in aged CVD-grown monolayer WS2 are experimentally studied by the steady-state photoluminescence measurement. Specifically, the photoluminescence mapping experiment is conducted to demonstrate the spatial distribution of the defect bound excitons, whose spectral feature is located ~0.2 eV below the neutral free Aexcitons. Additionally, the power-dependent photoluminescence experiment is applied to investigate the behavior of the defect-state photoluminescence and a significant nonlinear dependence of defect bound excitons on excitation power is revealed. Furthermore, we directly observed the disappearance of defect-state photoluminescence by exposing sample to high laser power irradiation, which can be explained by the enhanced desorption process of molecules physiosorbed on surfaces under laser irradiation. The results of our work provide a comprehensive understanding for the defect bound excitons in monolayer tungsten disulfide, which is essential in promoting the development of defect engineering about two-dimensional semiconducting TMDs and may pave the way for tailoring the performance of the optoelectronic device.","PeriodicalId":197837,"journal":{"name":"SPIE/SIOM Pacific Rim Laser Damage","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122212013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Numerical investigation of growth model for laser-induced damage in optics under high power laser irradiation 高功率激光照射下光学材料激光损伤生长模型的数值研究

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2539816

Yi Chen, Sensen Li, Xiangyu Qu, Pengyuan Du, L. Ding, Zhiwei Lu, Yulei Wang, Xiusheng Yan

引用次数: 3

Research on autonomous landing of UAV based on vision sequence image 基于视觉序列图像的无人机自主着陆研究

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2535760

Wenkai Suo, Wengang Hu, Xia Li, Yan Zhang

引用次数: 0

Structural defects in ultra-low laser absorption fused silica 超低激光吸收熔融二氧化硅的结构缺陷

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2539953

Yuan-cheng Sun, Xiu-rong Du, Xiao-qiang Zhang, Xue-fu Song, Ning Hua

引用次数: 0

Study on band gap and dispersion model of Al2O3 thin films with different oxygen flow rates by ion beam sputtering 离子束溅射不同氧流速下Al2O3薄膜带隙及色散模型的研究

SPIE/SIOM Pacific Rim Laser Damage Pub Date : 2019-07-08 DOI: 10.1117/12.2539622

Jiahuan He, Dan Chen, Lishuan Wang, Shida Li, Dan-dan Liu, Yugang Jiang, Meiping Zhu, Hua-song Liu

引用次数: 1