Optical Frontiers最新文献_第4页

Rapid axial scanning system for acquisition of defocus-enhanced dataset 用于离焦增强数据集采集的快速轴向扫描系统

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684981

Zilong Li, Jiaqing Dong, Guijun Wang, Wenhua Zhong, Qiegen Liu, Xianlin Song

引用次数: 0

Taurine modified hole transport layers for efficient low-bandgap perovskite solar cells 高效低带隙钙钛矿太阳能电池中牛磺酸修饰的空穴传输层

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684547

Huayang Wang, Tianshu Ma, Yuhui Liu, Changlei Wang

{"title":"Taurine modified hole transport layers for efficient low-bandgap perovskite solar cells","authors":"Huayang Wang, Tianshu Ma, Yuhui Liu, Changlei Wang","doi":"10.1117/12.2684547","DOIUrl":"https://doi.org/10.1117/12.2684547","url":null,"abstract":"All-perovskite tandem solar cells (TSCs) show an effective way to overcome the efficiency limit of single-junction perovskite solar cells (PSCs). Low-bandgap mixed tin-lead perovskite bottom subcell is a critical component in all perovskite TSCs, which are currently limited by the relatively low efficiency and poor stability of the bottom subcells. Here in this work, we use multifunctional taurine material to dope and modify the PEDOT:PSS hole transport layer (HTL) for better optical transmittance and charge transporting properties, enabling efficient low-bandgap PSCs with highly improved open circuit voltages and short circuit current densities. Taurine has a suitable refractive index to reduce light reflection loss when introduced at the interface of PEDOT:PSS/perovskite film. Moreover, taurine improves the energy level alignments and facilitates charge transfer dynamics in the low-bandgap PSCs when doped into the PEDOT:PSS HTL. Finally, the synergistic effects of the interface modification and bulk doping of PEDOT:PSS with taurine leads to significantly enhanced efficiencies of over 22% and 26% for low-bandgap PSCs and all-perovskite TSCs, respectively.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134302356","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

Enzyme-free photoelectrochemical sensing of glucose based on the TiO2/CuO heterojunction 基于TiO2/CuO异质结的葡萄糖无酶光电化学传感

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684880

Shengchen Ke, Ruoxi Zhang, Weijian Zhu, Wenxiang Lu, Lu Ma, Linling Qin, Shaolong Wu

{"title":"Enzyme-free photoelectrochemical sensing of glucose based on the TiO2/CuO heterojunction","authors":"Shengchen Ke, Ruoxi Zhang, Weijian Zhu, Wenxiang Lu, Lu Ma, Linling Qin, Shaolong Wu","doi":"10.1117/12.2684880","DOIUrl":"https://doi.org/10.1117/12.2684880","url":null,"abstract":"Conventional enzyme-based glucose sensors have good selectivity and sensing performance, but the disadvantages of the enzyme itself (enzyme activity is susceptible to pH and temperature) lead to a limited number of uses and result in high costs. Therefore, photoelectrochemical enzyme-free glucose sensors have attracted research interest in recent years. In this work, the TiO2/CuO heterojunction was constructed and photoelectrochemical enzyme-free glucose sensing was realized. The sensing sensitivity of the TiO2/CuO heterojunction photoelectrode prepared by magnetron sputtering and thermal annealing process was 864 μAμM-1 cm-2 in the range of 1–9 mM with a detection limit of 58.6 μM at 0.2 V, exhibiting satisfactory stability as well as interference resistance. This better sensing performance mainly comes from: 1) the absorption of photogenerated carriers generated from sunlight by TiO2 films, which participate in glucose redox; 2) the conversion of the metal valence state (Cu2+/Cu3+) of the P-type semiconductor CuO under alkaline conditions can promote glucose redox; 3) the heterojunction formed by CuO and TiO2 reducing the compounding of photogenerated carriers thus improving the photoelectric conversion efficiency. The heterojunction formed by CuO and TiO2 greatly facilitates the surface carrier transfer of glucose oxidation reaction. This work provides a new way for enzyme-free glucose sensing and promotes the development of glucose detection technology.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114476923","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

Optimization algorithm for amplitude-only hologram based on digital micromirror device 基于数字微镜器件的纯幅全息图优化算法

Optical Frontiers Pub Date : 2023-05-31 DOI: 10.1117/12.2684986

Ming-xing Zhou, Yun Chen, Jianhong Wu

{"title":"Optimization algorithm for amplitude-only hologram based on digital micromirror device","authors":"Ming-xing Zhou, Yun Chen, Jianhong Wu","doi":"10.1117/12.2684986","DOIUrl":"https://doi.org/10.1117/12.2684986","url":null,"abstract":"An optimization algorithm for binary amplitude-only hologram (BAOH) based on the point source method (PSM) with the holographic viewing window (HVW) by using particle swarm optimization (PSO) is proposed. We convert the 256 grayscale levels of each pixel of the original image into an 8-bit binary format and sequentially extract the effective bits of each pixel to generate eight frames of binary original images. Then we introduce random constant phases to be optimized on the wavefront phase of the point source to superimpose the wavefront and generate a grayscale hologram with Burch encoding and binarize it. PSO algorithm is used to search for the optimized constant phase (OCPs) corresponding to each point source wavefront to generate an optimized BAOH. The grayscale representation of the reconstructed image is achieved by sequentially loading eight frames of BAOH on the digital micromirror device (DMD) while controlling the pulse width doubling the illumination of the laser. Simulation results show that the speckle noise of the reconstructed image using the proposed method is significantly suppressed compared with that using the random phase method (RPM), which demonstrates the feasibility of the proposed method.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127425455","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

Study on multi-beam laser coherent imaging system 多光束激光相干成像系统的研究

Optical Frontiers Pub Date : 2022-08-11 DOI: 10.1117/12.2644089

H. Liu, Xingru Gao, Xiujuan Luo, Yu Zhang, Minglai Chen, Z. Yue

引用次数: 0

Ultra-compact Q-switched eye-safe glass laser 超紧凑型调q安全玻璃激光器

Optical Frontiers Pub Date : 2022-08-11 DOI: 10.1117/12.2643791

Wei Wang, Yong Wang, Siwei Zhang

引用次数: 0

Color characterization of multispectral camera based on pattern search algorithm 基于模式搜索算法的多光谱相机颜色表征

Optical Frontiers Pub Date : 2022-08-11 DOI: 10.1117/12.2643642

Long Ma, Haitang Chen

引用次数: 0

Effects of space low energy proton irradiation on optical properties of diamond thin films 空间低能质子辐照对金刚石薄膜光学性能的影响

Optical Frontiers Pub Date : 2022-08-11 DOI: 10.1117/12.2645860

Kesheng Guo, Q. Hu, Qiaoyi Liu, B. He, Tianyun Li, Lang Hu

{"title":"Effects of space low energy proton irradiation on optical properties of diamond thin films","authors":"Kesheng Guo, Q. Hu, Qiaoyi Liu, B. He, Tianyun Li, Lang Hu","doi":"10.1117/12.2645860","DOIUrl":"https://doi.org/10.1117/12.2645860","url":null,"abstract":"Diamond films are transparent in a wide range of wavelengths (ultraviolet-far-infrared-terahertz bands are transmitted), and are used in optical windows, aircraft missile hoods, etc., where low-energy protons (keV magnitude) in space will create gaps, vacancies and other material radiation effects. In this paper, diamond films with different grain sizes were grown on the surface of fused silica by microwave plasma chemical vapor deposition, and the influence of proton irradiation on the surface morphology, optical transmittance and Raman spectrum of diamond films was studied. The ion distribution and vacancy distribution of diamond thin films under proton irradiation were calculated and analyzed by calculation (Monte Carlo method). When the flow ratio of methane/hydrogen was 1%, by adjusting the height of the sample stage, diamond nanocrystalline films with different growth temperatures were prepared on the surface of fused silica. After proton irradiation, the transmittance curve of the film has a slight red shift, and the transmittance decreases significantly in the wavelength range of 500-900nm, and the maximum transmittance decreases by 5-7%. After proton irradiation, the peak intensities of the Raman spectra become weaker, and the peak intensities of both the diamond phase and the non-diamond phase are weakened. Under the irradiation of protons with energy of 50keV, the main action depth of the diamond film is in the range of 2-5 microns, and the effect on the surface and deeper regions is not obvious, but gaps and vacancies are generated at a depth of several micrometers.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131998670","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

Using speckle to generate optical vortices 利用散斑产生光学涡流

Optical Frontiers Pub Date : 2022-08-11 DOI: 10.1117/12.2643517

Hai-bin Sun, Tingting Liu, Jun Chen, P. Sun

引用次数: 0

Research on AGV steering control algorithm based on improving pure tracking model 基于改进纯跟踪模型的AGV转向控制算法研究

Optical Frontiers Pub Date : 2022-08-11 DOI: 10.1117/12.2643696

Han Bin, Liu-Hsu Lin, Hao Qun, Cao Jie, Luo Jiahong, Zhang Bo Rui, Zhang Lei

{"title":"Research on AGV steering control algorithm based on improving pure tracking model","authors":"Han Bin, Liu-Hsu Lin, Hao Qun, Cao Jie, Luo Jiahong, Zhang Bo Rui, Zhang Lei","doi":"10.1117/12.2643696","DOIUrl":"https://doi.org/10.1117/12.2643696","url":null,"abstract":"Aiming at the problem of low initial accuracy of AGV after steering, we design a vehicle steering control algorithm based on an improved pure tracking model. Firstly, in order to improve the adaptive ability of the pure tracking model, we estimate the look-ahead distance of the pure tracking model in real time through the PSO algorithm. We use the IWO algorithm to optimize the ability of the particle swarm finding fitness, so as to avoid the particle swarm easily falling into local convergence during the working process. Secondly, in order to meet the requirements of the improved pure tracking model for continuous curvature, we add an easing curve to the traditional fishtail U-turn trajectory, and design a non-tangential round fishtail U-turn. Finally, we carry out a simulation test of the algorithm. The test results show that: using the IWO-PSO-PTM algorithm, when the vehicle speed is 0.75m/s for U-turn, the maximum lateral error is less than 0.42m, and the root mean square error is 0.18m. And when the straight line travel distance exceeds 4m after line change, the maximum lateral error is less than 0.02m. The pure tracking algorithm improved by IWO-PSO can effectively improve the initial accuracy of the AGV after steering.","PeriodicalId":184319,"journal":{"name":"Optical Frontiers","volume":"155 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128693098","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