检索结果-内蒙古大学图书馆

Realizing a flexible and wavelength-tunable random laser inspired by cicada wings

Journal of Materials Chemistry C 2024年第16期12卷 5701-5707页

作者： Chou, Chia-Jung Abe, Ayano Tang, Jian-Fu Lin, Tzu-Chau Kuo, Chi-Ching Lin, Ja-Hon Adachi, Chihaya Department of Electro-Optical Engineering Advanced Nanophotonics Technology Laboratory National Taipei University of Technology Taipei10608 Taiwan Kyushu University 744 Motooka Nishi-ku Fukuoka819-0395 Japan Department of Electronic Engineering Lunghwa University of Science and Technology Taoyuan333 Taiwan Department of Chemistry Photonic Materials Research Laboratory NCU-Covestro Research Center National Central University Taoyuan320 Taiwan Institute of Organic and Polymeric Materials National Taipei University of Technology Taipei106 Taiwan

A bio-tissue-inspired random laser (RL) has been successfully demonstrated using a dye-covered silk fibroin replica film (DC-SFRF) fabricated through soft lithography of a cicada's wing. Thanks to the increased light scattering between the nanopapillate structures of the DC-SFRF, the RL exhibits a lower lasing threshold, higher slope efficiency, and broader angular emission compared to those of the dye-covered silk fibroin film (DC-SFF). The low spatial coherence NIR RL can also serve as a suitable light source in bio-diagnosis to generate a low speckle noise image with a contrast of approximately 0.040. By employing flexible PET as a substrate, we have demonstrated the flexibility of the near-infrared random laser (NIR RL) through the application of mechanical stress to alter the distribution of nanopapillate structures on the surface of the replica film. As the curvature increases, the DC-SFRF RL exhibits a blue shift of 13.3 nm in the emission spectrum and a further reduction in the speckle contrast to 0.031. © 2024 The Royal Society of Chemistry

关键词： Emission spectroscopy

来源：评论

学校读者我要写书评

暂无评论

Generalized Inverse Source: Matter, Information and Energy

Generalized Inverse Source: Matter, Information and Energy

引用

Photonics for Energy 2021

作者： Hua, Liu Science and Technology on Electro-optic Control Laboratory China Luoyang Institute of Electro-optical Equipment of AVIC China Beijing Institute of Technology Beijing China

ISBN: (数字)9781510646360

ISBN: (纸本)9781510646353

In many fields of physics, there is a common inverse source problem, that is, there is a measured optical or electrical signal intensity distribution or scattering differential cross section to retrieve the lost phase information, so as to reconstruct the full wave function. The phase recovery of imaging system is one of these typical problems. The model and experiment based on theory play a role in the development of system optics. And then, we have obtained effective solutions. © 2021 SPIE.

关键词： Inverse problems

来源：评论

学校读者我要写书评

暂无评论

STRATEGIES TO ENHANCE CONFIGURATIONS FOR HIGH-PRECISION MULTI-DISCIPLINARY OPTIMIZATION 32

STRATEGIES TO ENHANCE CONFIGURATIONS FOR HIGH-PRECISION MULT...

引用

32nd Congress of the International Council of the Aeronautical sciences, ICAS 2021

作者： Liu, Hua Li, Mingsuo Zhu, Ronggang Ding, Quanxin Zhou, Liwei Science and Technology on Electro-optic Control Laboratory China Luoyang Institute of Electro-optical Equipment of AVIC China Beijing Institute of Technology Beijing China

ISBN: (纸本)9783932182914

For aim to establish a high-precision sensor system configuration, this paper presents a new approach to the software architecture to enhance the multidisciplinary design frame that facilitates the reuse of existing components, the addition new ones, and the scripting of multidisciplinary optimization procedures. Firstly, some strategies applied to implement the necessary components of a high-precision optoelectronic structural design environment for complete sensor system configurations, and demonstrate the advantages with different parts studied, that is optical system module, electronic module, control module, and the relationship among these correlative components. At the core of the configuration is a core photonics to define the system function and role to give solutions to external users, and three so that more than three subjects will be applied cooperative. © 2021 32nd Congress of the International Council of the Aeronautical sciences, ICAS 2021. All rights reserved.

关键词： optical systems

来源：评论

学校读者我要写书评

暂无评论

Stereo nerve network: Systematic construction, computational process, and intelligent manufacturing 5

Stereo nerve network: Systematic construction, computational...

引用

Advanced Laser Processing and Manufacturing V 2021

作者： Liu, Hua Ding, Quanxin Li, Mingsuo Zhu, Ronggang Science and Technology on Electro-optic Control Laboratory China Luoyang Institute of Electro-optical Equipment of AVIC China Beijing Institute of Technology Beijing China

ISBN: (数字)9781510646346

ISBN: (纸本)9781510646339

In intelligent manufacturing system, a systematic method of constructing stereo vision using neural network is proposed, and the operation and control mechanism in practical operation is put forward. In particular, the concept of calculation process is established. And this method overcomes the complexity of a large number of calculations. And it has significant advantages in the system scientifically, the operation speed and the operability. © 2021 SPIE.

关键词： Stereo vision

来源：评论

学校读者我要写书评

暂无评论

Comprehensive study of the ultrafast photoexcited carrier dynamics in Sb_(2)Te_(3)–GeTe superlattices

引用

Chinese Physics B 2024年第7期33卷 381-387页

作者：叶之江金钻明蒋叶昕卢琦贾梦辉钱冬黄夏敏李舟彭滟朱亦鸣 Terahertz Technology Innovation Research Institute Terahertz Spectrum and Imaging Technology Cooperative Innovation CenterShanghai Key Laboratory of Modern Optical SystemUniversity of Shanghai for Science and TechnologyShanghai 200093China Shanghai Institute of Intelligent Science and Technology Tongji UniversityShanghai 200092China Key Laboratory of Artificial Structures and Quantum Control(Ministry of Education) Shenyang National Laboratory for Materials ScienceSchool of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China GBA Branch of Aerospace Information Research Institute Chinese Academy of SciencesGuangzhou 510700China Guangdong Provincial Key Laboratory of Terahertz Quantum Electromagnetics Guangzhou 510700China University of Chinese Academy of Sciences Beijing 100039China

Chalcogenide superlattices Sb_(2)Te_(3)-GeTe is a candidate for interfacial phase-change memory(iPCM) data storage *** employing terahertz emission spectroscopy and the transient reflectance spectroscopy together,we investigate the ultrafast photoexcited carrier dynamics and current transients in Sb_(2)Te_(3)-GeTe *** orientation and excitation polarization dependences of the THz emission confirm that ultrafast thermo-electric,shift and injection currents contribute to the THz generation in Sb_(2)Te_(3)-GeTe *** decreasing the thickness and increasing the number of GeTe and Sb_(2)Te_(3) layer,the interlayer coupling can be enhanced,which significantly reduces the contribution from circular photo-galvanic effect(CPGE).A photo-induced bleaching in the transient reflectance spectroscopy probed in the range of~1100 nm to~1400 nm further demonstrates a gapped state resulting from the interlayer *** demonstrates play an important role in the development of iPCM-based high-speed optoelectronic devices.

关键词： Sb_(2)Te_(3)/GeTe superlattices ultrafast carrier dynamics interfacial phase change memory THz emission spectroscopy transient reflectance spectroscopy

来源：评论

学校读者我要写书评

暂无评论

A High-Speed Automatic Polarization controller based on the Silicon Photonics Platform

A High-Speed Automatic Polarization Controller based on the ...

引用

CLEO: science and Innovations in CLEO 2024, CLEO: S and I 2024 - Part of Conference on Lasers and electro-Optics

作者： Wang, Weiqin Zhou, Ziwen Zeng, Yifan Peng, Wenyi Wu, Hao Ding, Yunhong Yan, Siqi Tang, Ming School of Optical and Electronic Information Huazhong University of Science and Technology Wuhan430074 China Optics Valley Laboratory Wuhan430074 China School of Future Technology Wuhan430074 China Department of Electro Denmark Technical University Kongens Lyngby2800 Denmark

We proposed an automatic polarization controller based on a novel thermal phase tuning structure on the silicon platform, with a polarization control speed of up to 20 krad/s, which is the fastest reported silicon-bas... 详细信息

关键词： Polarization

来源：评论

学校读者我要写书评

暂无评论

All-optical logic gates based on hierarchical photonic crystal modulated photoluminescence of perovskite nanocrystals

引用

science China(Technological sciences) 2023年第9期66卷 2735-2742页

作者： WANG Yun ZHA YanFang YANG YunYi LIU CiHui DI YunSong CAO GuiYuan WEI ShiBiao CHEN ZhiHui GAN ZhiXing Center for Future Optoelectronic Functional Materials School of Computer and Electronic InformationSchool of Artificial IntelligenceNanjing Normal UniversityNanjing 210023China Centre for Translational Atomaterials School of ScienceSwinburne University of TechnologyHawthorn VIC 3122Australia Nanophotonics Research Center Shenzhen Key Laboratory of Micro-Scale Optical Information TechnologyShenzhen UniversityShenzhen 518060China Key Laboratory of Advanced Transducers and Intelligent Control Systems Ministry of Education and Shanxi ProvinceCollege of Electronic Information and Optical EngineeringTaiyuan University of TechnologyTaiyuan 030024China

Halide perovskites exhibit high performance in all sorts of optoelectronic and photonic areas, suggesting their huge potential in integrated photonic devices. However, until now, all optical logic gates based on perovskites are still rarely explored, hindering the development of all-optical networks and computing. Herein, a new concept of all-optical logic gates is proposed based on the modulation of photoluminescence(PL) from perovskite nanocrystals(PNCs). A hierarchical photonic crystal(Hie PhC) is developed by self-assembling polystyrene(PS) and SiO2nanoparticles, which exhibit a higher PL enhancement than that of a monolayer PhC. Moreover, the light-controlled PL is realized by taking advantage of the high thermal response of the PL from PNCs/Hie PhC on polyethylene(PE) substrate, assisted by a graphene layer for light-heat conversion. Consequently, optical diode and triode are achieved based on the modulated PL, which exhibit contrast ratios(CR) of 24.7 and 74.0 dB, ***-optical logic gates, including “AND”, “OR” and “NOT”, are realized based on the optical diode and triode.

关键词： perovskite nanocrystals photonic crystals all-optical logic gates modulation of photoluminescence

来源：评论

学校读者我要写书评

暂无评论

Dual-state emission and two-wavelength amplified spontaneous emission behaviors observed from symmetric dyes based on functionalized fluorene and benzotriazole units

引用

Chemical Communications 2024年第46期60卷 5948-5951页

作者： Lin, Tzu-Chau Cho, Shu-Tse Wu, Cheng-Lin Setyatama, Novia Eka Tung, Po-Han Hung, Bing-Yi Lin, Ja-Hon Jan, Pei-En Tsai, Ping-Hsun Lin, Hao-Wu Photonic Materials Research Laboratory Department of Chemistry National Central University Jhong-Li District Taoyuan City32001 Taiwan Department of Electro-Optical Engineering National Taipei University of Technology Taipei City106 Taiwan Department of Materials Science and Engineering National Tsing-Hua University Hsinchu30013 Taiwan

Structurally symmetric dyes using functionalized fluorenes and benzotriazole as the main building moieties have been synthesized and found to exhibit efficient dual-state emission (DSE) and interesting two-wavelength or dual amplified spontaneous emission (dual-ASE) behaviors in the solution phase, which may benefit the development of organic gain materials with dual-wavelength amplification. © 2024 The Royal Society of Chemistry.

关键词： Spontaneous emission

来源：评论

学校读者我要写书评

暂无评论

A dual-projector three-dimensional measurement model for shading problem of micro-scale object complex surface

引用

Optica Acta: International Journal of Optics 2023年第2期70卷 142-152页

作者： Cheng Gui Huikai Zhong Yanjun Fu Kejun Zhong Baiheng Ma Zhanjun Yan a School of Measuring and Optical Engineering Nanchang Hangkong University Nanchang People’s Republic of China a School of Measuring and Optical Engineering Nanchang Hangkong University Nanchang People’s Republic of Chinab Science and Technology on Electro-Optic Control Laboratory Luoyang People’s Republic of China b Science and Technology on Electro-Optic Control Laboratory Luoyang People’s Republic of China

Considering the inherent defects of the traditional triangulation method, always a shadow area is produced in the image collected by the camera. In this work, based on the traditional monocular vision measurement system, an auxiliary light source was added to alleviate the shadow problem. Two symmetrical digital light processing (DLP) projectors were also employed to project the modulated monochrome red fringe patterns and the monochrome blue fringe patterns onto the object, whereas the distorted fringe patterns were captured by the colour camera. The image collected by the colour camera was separated, whereas the deformation fringe information of the measured object was obtained in the red channel and blue channel, respectively. Fusion of red and blue channels information to eliminate measurement shadows. From the experimental results, the root mean square error (RMSE) of the system was about 6µm, and this method can effectively solve the shadow problem in small object measurement.

关键词： Fringe projection profilometry dual-projector system fringe separation image fusion

来源：评论

学校读者我要写书评

暂无评论

Research on Ballistic Planning Method Based on Improved DDPG Algorithm

Research on Ballistic Planning Method Based on Improved DDPG...

引用

Cyber-Physical Social Intelligence (ICCSI), International Conference on

作者： Shuai Xue Yun Han Hongyang Bai School of Energy and Power Engineering Nanjing University of Science and Technology Nanjing China Science and Technology on Electro-Optic Control Laboratory Luoyang Institute of Electro-Optical Equipment CAVIC Luoyang China

Aiming at the ballistic planning problem given the target position indication under the condition of satisfying the missile capability boundary and process constraints, an improved deep deterministic policy gradient (DDPG) algorithm is proposed. This method solves the problems of the traditional trajectory planning method, such as strong dependence on model, low adaptability to environment and lack of real-time performance. The agent is firstly trained by this algorithm at the initial stage in a simple environment through a guided training based on the slow training speed of deep neural network, and then the generated strategy is adopted as an initial strategy for retraining. In the process, the sampling strategy of experience-first playback is applied to the gradient algorithm of deep deterministic strategy, and the Ornstein-Uhlenbeck (OU) noise model is employed for increasing the exploration ability of the agent. Then, this work develops a comprehensive simulation model according to an actual environment, where an improved DDPG method is thus introduced into the ballistic planning field by combining with performance indicators for planning and the trajectory can also meet the constraints. In order to verify the effectiveness of this method, the Gaussian pseudo-spectrum method is also used to compare with the proposed method in this paper. The simulation results show that the ballistic planning time of this improved algorithm is only within 10ms, which is about 8 times shorter than that of Gaussian pseudo-spectrum method. The corresponding ballistics that satisfy the constraints can be quickly generated, which has a good convergence and robustness, and is also suitable for solving online ballistic planning problems.

关键词：

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：