Optics & Laser Technology最新文献_第6页

Multi-band chirped mirrors for enhanced dispersion management 用于增强频散管理的多波段啁啾反射镜

Optics & Laser Technology Pub Date : 2024-08-07 DOI: 10.1016/j.optlastec.2024.111525

Shih-Hsuan Chia, Yan-Cheng Li, Chi-Kuang Sun, Franz X. Kärtner

{"title":"Multi-band chirped mirrors for enhanced dispersion management","authors":"Shih-Hsuan Chia, Yan-Cheng Li, Chi-Kuang Sun, Franz X. Kärtner","doi":"10.1016/j.optlastec.2024.111525","DOIUrl":"https://doi.org/10.1016/j.optlastec.2024.111525","url":null,"abstract":"Effective dispersion management for broadband and highly dispersive optical systems becomes increasingly vital in ultrafast applications. While chirped mirrors provide a compact solution, their attainable dispersion is often limited by the operational bandwidth. This study introduces innovative multi-band chirped mirror designs that enable the management of group delay differences both within and between bands, further optimizing group delay dispersion across specific spectral regions. Here, we highlight the critical role of transmission group delay within multilayer coatings for broadband dispersion management, shifting the traditional interpretation which relies on the wavelength-dependent penetration of these coatings. We have thus developed a dual-band chirped mirror pair achieving group delay dispersion values of −100 fs in the 0.6–0.8 µm range and −260 fs in the 1.7–2.2 µm range, with the bands separated by more than an octave. Remarkably, this design outperformed a state-of-the-art ultrabroadband mirror pair by three and four times of group delay dispersion in the respective bands. We have also designed and implemented a specialized dual-band mirror pair for nonlinear light microscopy—a prime example of ultrafast applications—and successfully achieved transform-limited pulses for targeted fluorophore excitations. This research emphasizes the transformative potential of strategic group delay distribution, heralding a breakthrough in dispersive optical operations across specific wavelength ranges.","PeriodicalId":19597,"journal":{"name":"Optics & Laser Technology","volume":"35 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933927","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

Generation of extremely strong accelerating electric field by focusing radially polarized THz pulses with a paraboloid ring 利用抛物面环聚焦径向偏振太赫兹脉冲，产生极强的加速电场

Optics & Laser Technology Pub Date : 2024-08-06 DOI: 10.1016/j.optlastec.2024.111554

László Pálfalvi, Zerihun T. Godana, György Tóth, János Hebling

引用次数: 0

Nonlinear optical response and application of indirect narrow-bandgap SbTe nanosheets 间接窄带隙碲化镉纳米片的非线性光学响应与应用

Optics & Laser Technology Pub Date : 2024-08-06 DOI: 10.1016/j.optlastec.2024.111563

Enlin Cai, Linhong Hao, Shanming Li, Min Chen, Shuaiyi Zhang, Xinxing Liu, Yin Hang

引用次数: 0

A nonlinear model of flexoelectric liquid crystal diffraction gratings 柔电液晶衍射光栅的非线性模型

Optics & Laser Technology Pub Date : 2024-08-06 DOI: 10.1016/j.optlastec.2024.111502

Qihao Han, Steve J. Elston, Waqas Kamal, Linpei Xue, Stephen M. Morris

{"title":"A nonlinear model of flexoelectric liquid crystal diffraction gratings","authors":"Qihao Han, Steve J. Elston, Waqas Kamal, Linpei Xue, Stephen M. Morris","doi":"10.1016/j.optlastec.2024.111502","DOIUrl":"https://doi.org/10.1016/j.optlastec.2024.111502","url":null,"abstract":"This paper presents a nonlinear model for flexoelectric liquid crystal (LC) diffraction gratings and compares the results from simulations with those obtained from experiments, providing a more accurate description of the behaviour of the flexoelectric LC grating than that offered by the linear models that have been considered previously. The nonlinear model that is constructed considers both dielectric and flexoelectric coupling and, with the aid of numerical simulations, enables the visualization of the behaviour of the LC director in response to flexoelectric, dielectric, and elastic effects. From the numerical simulations, both in-plane and out-of-plane tilt angles are obtained which are then used to simulate the optical wave propagation and diffraction characteristics for light passing through the LC flexoelectric grating. To compare the results from simulations with experiments, we develop an LC mixture that is capable of forming a flexoelectric LC diffraction grating at room temperature. This mixture allows for real-time manipulation of the periodic splay-bend structure by adjusting the amplitude of the DC electric field, enabling control of the diffraction angle and intensity of light into the different diffraction orders. The consistency observed between our simulation results and experimental data underscores the reliability and accuracy of our proposed models.","PeriodicalId":19597,"journal":{"name":"Optics & Laser Technology","volume":"193 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933931","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

Analysis of plasmonic nanoparticles effects on the performance of perovskite solar cells through surface recombination and short-circuiting behaviors 通过表面重组和短路行为分析等离子纳米粒子对过氧化物太阳能电池性能的影响

Optics & Laser Technology Pub Date : 2024-08-05 DOI: 10.1016/j.optlastec.2024.111512

Mohamed M. Gad, Yasser M. El Batawy, Ezzeldin A. Soliman, Mai O. Sallam

{"title":"Analysis of plasmonic nanoparticles effects on the performance of perovskite solar cells through surface recombination and short-circuiting behaviors","authors":"Mohamed M. Gad, Yasser M. El Batawy, Ezzeldin A. Soliman, Mai O. Sallam","doi":"10.1016/j.optlastec.2024.111512","DOIUrl":"https://doi.org/10.1016/j.optlastec.2024.111512","url":null,"abstract":"Plasmonic photovoltaics integrate nanoparticles into the active layer to enhance power absorption. However a gap exists between simulated and experimental IV characteristics. Fabrication studies have attributed the issues to fabrication resolution, and recombination with no detailed step-by-step characterization. To address this issue, the paper presents a comprehensive optical and electrical study of a new plasmonic crescent nanoparticle (CNP). These particles serve as a near-field confinement source to enhance the efficiency of perovskite TiO-MAPbI-Spiro solar cells. The proposed design demonstrates that an optimized structure with polarization-dependent multiple modes can offer broad-spectrum absorption across both the visible and near-infrared spectra, resulting in a 15% improvement in the total absorption. The notably high stability of absorption with respect to parameter variation is a remarkable key factor. Employing Charge Transport (CHARGE) solver, the electrical characterization of the proposed plasmonic device is performed in a step-by-step procedure using three different models to characterize the sources of efficiency degradation The ohmic contact reduces quantum efficiency by 11%. Moreover, when surface recombination is considered, the degradation increases significantly to 54%, which matches the experimental studies in the literature. The paper also suggests incorporating a passivation layer which demonstrates its impact in enhancing the quantum efficiency from 18.2% to 22.2%.","PeriodicalId":19597,"journal":{"name":"Optics & Laser Technology","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933968","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

Fabrication and characterization of self-lubricating anti-wear 316L stainless steel/h-BN composite coatings on Q235 substrate via laser cladding 通过激光熔覆在 Q235 基材上制作自润滑抗磨损 316L 不锈钢/h-BN 复合涂层并确定其特性

Optics & Laser Technology Pub Date : 2024-08-05 DOI: 10.1016/j.optlastec.2024.111564

Yun Chen, Yuliang Xu, Tao Li, Juan Du, Lingyu Guo, Kaixiong Hu

{"title":"Fabrication and characterization of self-lubricating anti-wear 316L stainless steel/h-BN composite coatings on Q235 substrate via laser cladding","authors":"Yun Chen, Yuliang Xu, Tao Li, Juan Du, Lingyu Guo, Kaixiong Hu","doi":"10.1016/j.optlastec.2024.111564","DOIUrl":"https://doi.org/10.1016/j.optlastec.2024.111564","url":null,"abstract":"This paper presents the fabrication and characterization of self-lubricating, anti-wear 316L stainless steel composite coatings on a Q235 substrate using 316L stainless steel powders and nanoscale hexagonal boron nitride (h-BN) ceramic particles via coaxial powder feeding laser cladding. The influence of process parameters on cladding quality and geometry, and the impact of h-BN contents (2 wt% and 5 wt%) on the microstructure and mechanical properties of the coatings were studied. Optimal process parameters for 316L/5wt%BN coatings were identified: a powder feeding rate of 3–4 rpm, a laser power of 2200–2400 W, a scanning speed of 4–5 mm/s, and an overlapping rate of 40 %. Microstructural analysis showed a smooth surface without cracks or pores. X-ray diffraction revealed intermetallic compounds such as CrB, CrN, FeN, BN, and γ-(Fe, Ni). The inclusion of h-BN nanoparticles enhanced grain refinement, significantly increasing microhardness. Coatings with 5 wt% h-BN achieved an average microhardness of 438.8 HV10, 2.5 times higher than the substrate and the 316L stainless steel. Additionally, h-BN reduced friction coefficients, leading to substantial wear reduction. The 316L/5 wt% h-BN sample experienced only 4.2 mg of wear, 45.16 % of the substrate’s wear. These findings highlight the beneficial effects of h-BN nanoparticles on 316L stainless steel coatings, enhancing wear resistance, hardness, and overall performance.","PeriodicalId":19597,"journal":{"name":"Optics & Laser Technology","volume":"3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933933","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

Effect of overlap pattern on the residual stress, surface morphology and fatigue properties of Ti-6Al-4V alloy by multiple laser shock peening 重叠模式对多重激光冲击强化 Ti-6Al-4V 合金的残余应力、表面形貌和疲劳性能的影响

Optics & Laser Technology Pub Date : 2024-08-05 DOI: 10.1016/j.optlastec.2024.111486

Xuekun Luo, Ziheng Xu, Kai Tian, Yiming Wang, Xin Wang, Kun Wang, Yang Yu, Chang Ye, Ning Dang

引用次数: 0

Flexible blind quantum computation with unnecessarily universal quantum servers 利用不必要的通用量子服务器实现灵活的盲量子计算

Optics & Laser Technology Pub Date : 2024-08-05 DOI: 10.1016/j.optlastec.2024.111548

Xingjia Xie, Qin Li, Xiaoqing Tan, Limin Gao, Yan Hong

{"title":"Flexible blind quantum computation with unnecessarily universal quantum servers","authors":"Xingjia Xie, Qin Li, Xiaoqing Tan, Limin Gao, Yan Hong","doi":"10.1016/j.optlastec.2024.111548","DOIUrl":"https://doi.org/10.1016/j.optlastec.2024.111548","url":null,"abstract":"Blind quantum computation (BQC) allows clients with limited quantum capabilities to delegate their tasks to powerful quantum servers and still keep their inputs, algorithms, and outputs private. However, in the noisy intermediate-scale quantum (NISQ) era, quantum computers as servers only control limited number of qubits and are not powerful enough. In addition, each of current BQC models is usually suitable for only one type of users. Therefore, this paper offers a flexible BQC ( for short) model for two types of users with different quantum capabilities where any one of two types of users can complete BQC tasks with the help of the other type of users and quantum servers. To be more specific, we propose two protocols by using the given model. In the first protocol, one user Alice only with the ability to prepare single-qubit states can realize BQC tasks by cooperating with another user Bob who is just capable of performing single-qubit measurements and a quantum server Charlie. Similarly in the second one, Bob can realize BQC tasks by cooperating with Alice and Charlie. In both protocols, the server Charlie only requires a quantum register of small size and performing CZ gates and thus it is unnecessary to be universal and may be less difficult to realize in the short run. Furthermore, both proposed protocols are verifiable, namely that the user can detect whether the server is honest. Finally, examples of the proposed protocols for implementing Deutsch’s algorithms are simulated through Qiskit framework to show their feasibility and correctness.","PeriodicalId":19597,"journal":{"name":"Optics & Laser Technology","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933936","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

Rapid surface patterning to strengthen adhesive bonding of carbon fiber reinforced polymer by spatial shaping femtosecond laser 利用空间塑形飞秒激光快速制作表面图案，加强碳纤维增强聚合物的粘合力

Optics & Laser Technology Pub Date : 2024-08-05 DOI: 10.1016/j.optlastec.2024.111562

Yanping Yuan, Xiaoran Guo, Huiyu He, Kaihu Zhang, Weina Han

{"title":"Rapid surface patterning to strengthen adhesive bonding of carbon fiber reinforced polymer by spatial shaping femtosecond laser","authors":"Yanping Yuan, Xiaoran Guo, Huiyu He, Kaihu Zhang, Weina Han","doi":"10.1016/j.optlastec.2024.111562","DOIUrl":"https://doi.org/10.1016/j.optlastec.2024.111562","url":null,"abstract":"Carbon fiber reinforced polymer (CFRP) have become gradually important in the aerospace industry due to their outstanding strength-to-weight ratio. However, traditional mechanical surface treatment methods are challenging to apply to CFRP because of their anisotropic and nonhomogeneous properties. Femtosecond laser offers unique advantages for surface treatment, as it allows processing with very low thermal load due to the extremely short interaction time. This study investigates the effect of different surface structures resulting from surface treatment using a femtosecond laser on adhesive properties of CFRP. The experimental results show that: 1) beam shaping can be realized by using the plano-convex cylindrical mirror, which improves the quality of laser processing and greatly improves processing efficiency. It only takes 20 s to complete the laser processing of a 1 cm*1 cm area, which increases the work efficiency by 49 times. 2) pre-bonding surface treatment significantly enhances the tensile shear strength of the single lap joint, and the shear strength of samples with low spatial frequency LIPSS (LSFL) (14.57 ± 1.58 MPa) is 2.96 times higher than that of the untreated sample (US) (4.92 ± 1.34 MPa). 3) LSFL structure exhibits the best results, because the surface of CFRP with LSFL exhibits a relatively higher surface polarity and surface energy. This study provides an efficient, high-precision, and low-damage surface treatment method for preparing CFRP for adhesive bonding, which may promote the application of femtosecond laser technology in difficult-to-process composite materials and provide new methods and technical support for its application in aerospace, vehicle manufacturing, and other fields.","PeriodicalId":19597,"journal":{"name":"Optics & Laser Technology","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141933934","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

Laser irradiation-induced surface-enhanced Raman scattering of Sn@SnO composite films 激光辐照诱导的 Sn@SnO 复合薄膜表面增强拉曼散射

Optics & Laser Technology Pub Date : 2024-08-05 DOI: 10.1016/j.optlastec.2024.111560

Xingxing Du, Jiawei Wang, Ruijin Hong, Chunxian Tao, Qi Wang, Hui Lin, Zhaoxia Han, Dawei Zhang

引用次数: 0