IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-26 DOI: 10.1016/j.ijleo.2025.172492

A. Fakkahi , H. Azmi , M. Jaouane , A. Sali , A. Ed-Dahmouny , K. El-Bakkari , R. Arraoui , O. Ben Hammou , S. Elotmani , J. El-Hamouchi , Haddou El Ghazi

{"title":"Temperature and pressure effects on tunable second harmonic generation in GaAs/AlGaAs multilayered quantum dots","authors":"A. Fakkahi , H. Azmi , M. Jaouane , A. Sali , A. Ed-Dahmouny , K. El-Bakkari , R. Arraoui , O. Ben Hammou , S. Elotmani , J. El-Hamouchi , Haddou El Ghazi","doi":"10.1016/j.ijleo.2025.172492","DOIUrl":"10.1016/j.ijleo.2025.172492","url":null,"abstract":"<div><div>In this paper, we investigated the effects of applied hydrostatic pressure and temperature on the second harmonic generation (SHG) of a hydrogenic impurity confined in a multilayered quantum dot (MLQD). Using the finite element method (FEM) within the framework of the effective mass approximation (EMA), we have calculated the energy levels and wave functions for different states of a <span><math><mrow><mi>G</mi><mi>a</mi><mi>A</mi><mi>s</mi><mo>/</mo><mi>A</mi><msub><mrow><mi>l</mi></mrow><mrow><mi>x</mi></mrow></msub><mi>G</mi><msub><mrow><mi>a</mi></mrow><mrow><mn>1</mn><mo>−</mo><mi>x</mi></mrow></msub><mi>A</mi><mi>s</mi></mrow></math></span> MLQD under external perturbations. Then, we calculated the SHG coefficient using the eigenvalues and their corresponding wave functions. Our main findings show that external pressure (temperature) causes a decrease (increase) in energy levels, thereby enhancing SHG efficiency. This study highlights the potential of electronic environment engineering in MLQDs as an effective approach to modulate and enhance their nonlinear optical properties. These findings pave the way for designing advanced photonic devices, including quantum dot-based lasers and modulators, capable of operating under varying thermal and mechanical conditions.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"338 ","pages":"Article 172492"},"PeriodicalIF":3.1,"publicationDate":"2025-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on joint control algorithm for optical path of sparse aperture imaging system 稀疏孔径成像系统光路联合控制算法研究

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-24 DOI: 10.1016/j.ijleo.2025.172496

Junhong Qian, Sen Jiang, Yuan Tian, Tao Li

{"title":"Research on joint control algorithm for optical path of sparse aperture imaging system","authors":"Junhong Qian, Sen Jiang, Yuan Tian, Tao Li","doi":"10.1016/j.ijleo.2025.172496","DOIUrl":"10.1016/j.ijleo.2025.172496","url":null,"abstract":"<div><div>To solve the problem of poor cophasing errors correction in the sparse aperture imaging system, a joint optimal control algorithm for optical path control is proposed. A stochastic parallel gradient descent (SPGD) algorithm is employed to create a joint control system that incorporates multiple piezoelectric ceramics in a sparse aperture imaging system, aiming to optimize imaging definition. The experimental results show that the response curves of different displacements are basically coincident with the expected displacement curves, the response time can be effectively controlled within 0.08 s for different displacements, and the position error can be effectively controlled within ±3 nm. The SPGD joint control system is applied to a three-aperture sparse aperture imaging system for comparison experiment of resolution board imaging. Quantitative evaluation of the images before and after cophasing errors correction is made, resulting in an evaluation value <em>J</em><sub>1</sub> = 0.54 before correction and <em>J</em><sub>2</sub> = 0.78 after correction. This demonstrates that the joint control system is efficient in controlling optical path accuracy, correcting cophasing errors, and achieving sub-beam interference imaging.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"338 ","pages":"Article 172496"},"PeriodicalIF":3.1,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144711900","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantitative scale for measuring serum lipemia using optical transmittance measurements 用光学透射率测量血清脂血症的定量刻度

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-23 DOI: 10.1016/j.ijleo.2025.172494

Roberto Márquez-Islas , Argelia Pérez-Pacheco , Marco Polo Colín-García , Yadira Béjar-Ramírez , Jesús Vargas-Sánchez , Augusto García-Valenzuela

{"title":"Quantitative scale for measuring serum lipemia using optical transmittance measurements","authors":"Roberto Márquez-Islas , Argelia Pérez-Pacheco , Marco Polo Colín-García , Yadira Béjar-Ramírez , Jesús Vargas-Sánchez , Augusto García-Valenzuela","doi":"10.1016/j.ijleo.2025.172494","DOIUrl":"10.1016/j.ijleo.2025.172494","url":null,"abstract":"<div><div>Carrying out an adequate classification of elevated content of lipoproteins in the blood is of great importance in the clinical and research field. High lipoprotein levels can mask pathologies in the blood and affect the interpretation of blood results. In this study, we propose an unambiguous quantitative scale for lipemia based on optical transmittance measurements at two specific wavelengths of whole blood samples. Whole blood drawn from donors (105 in total) aged between 18 and 65 years, divided into two groups, was tested after a fasting period of 8–10 h. Trained technicians visually determined the degree of lipemia. Lipid profile analysis of the first group (48 samples) and transmittance measurements of the plasma (57 samples) of the second group were obtained. We found that the correspondence between the concentration of any of the analyzed lipoproteins and the degree of lipemia, determined visually, is not one-to-one for most of the samples. A simple theoretical analysis based on Mie scattering is presented to elucidate the possible contribution of different lipoproteins to the observed degree of lipemia in the different blood samples. Our analysis suggests that the turbidity of blood serum is due only to VLDL lipoproteins and is directly related to their size. The reclassification of the degree of lipemia using our proposed quantitative scale coincides with the original classification performed visually by the trained technician in 65 % of the cases.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"338 ","pages":"Article 172494"},"PeriodicalIF":3.1,"publicationDate":"2025-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144724381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A scheme for increasing the sensitivity of metal–insulator–metal perfect absorber sensors 一种提高金属-绝缘体-金属完美吸收器传感器灵敏度的方案

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-18 DOI: 10.1016/j.ijleo.2025.172477

M. Askari

引用次数: 0

BRDF determination based on topography measurement and Monte Carlo ray tracing 基于地形测量和蒙特卡罗射线追踪的BRDF测定

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-17 DOI: 10.1016/j.ijleo.2025.172476

Florent Retailleau , Marie-Hélène Aumenier , Laurent Marot

{"title":"BRDF determination based on topography measurement and Monte Carlo ray tracing","authors":"Florent Retailleau , Marie-Hélène Aumenier , Laurent Marot","doi":"10.1016/j.ijleo.2025.172476","DOIUrl":"10.1016/j.ijleo.2025.172476","url":null,"abstract":"<div><div>The Bidirectional Reflectance Distribution Function (BRDF) is a function that relates the incident light on a surface to the reflected light, which depends on several parameters such as the angle of incidence, the angle of reflection, the wavelength and the surface properties of the material. Knowledge of the BRDF is very important, especially in infrared thermography, to predict the light behavior in a reflective environment and its effect on the interpretation of the infrared (IR) image. This paper proposes a new BRDF modeling method for opaque materials with different roughness. The method is based on a 3D reconstruction of the sample surface obtained from topographic measurements such as confocal and atomic force microscopy (AFM) and Monte Carlo ray tracing algorithms (MCRT). The relevance of the topographic acquisition is closely related to the surface properties of the sample, in particular roughness and homogeneity. The BRDFs calculated with this method were compared with BDRFs measured with two different experimental spectrophotometer systems equipped with goniometers in order to validate this new approach.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"338 ","pages":"Article 172476"},"PeriodicalIF":3.1,"publicationDate":"2025-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144656377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Liquid modulated ultra-high performance photonic crystal fiber devices with simple structure 结构简单的液体调制超高性能光子晶体光纤器件

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-12 DOI: 10.1016/j.ijleo.2025.172480

Junjun Wu , Huimin Shi , Chao Wang , Yujun Wang , Chao Dou

引用次数: 0

High quality remote laser cutting of polymer lithium-ion battery separator using a NIR picosecond-pulsed laser 近红外皮秒脉冲激光高质量远程切割聚合物锂离子电池隔膜

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-11 DOI: 10.1016/j.ijleo.2025.172481

Pourya Heidari Orojloo, Ali Gökhan Demir

{"title":"High quality remote laser cutting of polymer lithium-ion battery separator using a NIR picosecond-pulsed laser","authors":"Pourya Heidari Orojloo, Ali Gökhan Demir","doi":"10.1016/j.ijleo.2025.172481","DOIUrl":"10.1016/j.ijleo.2025.172481","url":null,"abstract":"<div><div>Due to the increasing demand for electrification in general and battery manufacturing in particular, there is a need to use digital tools wisely. Laser is a digital tool that could process materials with high precision and quality. The polymer separator is one of the basic components of lithium-ion battery, which has the significant effect on the performance of lithium-ion battery. The remote laser cutting of the 25 µm-thick lithium-ion battery separator was experimentally investigated using nanosecond and picosecond near-infrared laser systems. The ns-pulsed laser was found to be sensitive to the material directionality and it could not achieve melt free cuts at processing conditions suitable for the industrial production. The ps-pulsed laser produced clean cut kerfs at high productivity. In terms of cutting productivity, the cutting speed of the ultrashort pulse laser system is approximately 700 times that of the short pulse laser system. To estimate the change in the material’s optical properties, the fluence efficiency model was employed. It was found that the apparent optical absorptivity of the material changes from 0.4 cm<sup>−1</sup> to 1400 cm<sup>−1</sup> when the pulse duration is changed from the nanosecond to the picosecond regime for the same wavelength.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"338 ","pages":"Article 172481"},"PeriodicalIF":3.1,"publicationDate":"2025-07-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144672694","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of surface irregularities on the optical performance of the injection-molded right-angled triangular plastic prisms: Experiment and numerical simulation 表面不规则性对注塑直角三角形塑料棱镜光学性能的影响：实验与数值模拟

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-10 DOI: 10.1016/j.ijleo.2025.172479

Marzieh Pournoury, Jong-In Son, Tae Young Kim

{"title":"Impact of surface irregularities on the optical performance of the injection-molded right-angled triangular plastic prisms: Experiment and numerical simulation","authors":"Marzieh Pournoury, Jong-In Son, Tae Young Kim","doi":"10.1016/j.ijleo.2025.172479","DOIUrl":"10.1016/j.ijleo.2025.172479","url":null,"abstract":"<div><div>A right-angle triangular plastic prism is manufactured by injection molding (IM) technique which is the most efficient mass production technology for high volume applications. The surfaces produced on the right-angle triangular plastic prism are loaded with irregularities which distort prism performance and make wavefront aberration. The quality of the plastic prism in case of optical performance and wavefront peak to valley were analyzed by Zemax simulation and compared with the measurement data. The latter was measured with a µPhase interferometer by Trioptics operating based on the Twyman-Green principle. We validated the accuracy of our simulation by comparing the calculated results with interferometer measurement. Levering this confirmed accuracy, we employed Zemax to further evaluate the impact of legs and hypotenuse surfaces of the IM right-angle triangular plastic prism on its optical performance. Our primary focus was on identifying which of the legs or hypotenuse most significantly affects its optical output. Our findings indicate that the hypotenuse surface roughness exerts the most substantial influence on the output optical performance. This result has critical implications for the design and optimization of optical systems incorporating right-angle triangular prisms. By refining the characteristics of the hypotenuse surface, significant improvements in optical performance can be achieved, thereby enhancing the overall efficiency and accuracy of the system. These findings provide valuable insights for optimizing the design of optical systems incorporating right-angle triangular prisms, highlighting the importance of precise surface analysis and refinement.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"338 ","pages":"Article 172479"},"PeriodicalIF":3.1,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144596445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A photonic assisted radar integrated communication system based on gain switched VCSEL 基于增益切换VCSEL的光子辅助雷达综合通信系统

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-08 DOI: 10.1016/j.ijleo.2025.172478

Anu Sam, M. Ganesh Madhan

{"title":"A photonic assisted radar integrated communication system based on gain switched VCSEL","authors":"Anu Sam, M. Ganesh Madhan","doi":"10.1016/j.ijleo.2025.172478","DOIUrl":"10.1016/j.ijleo.2025.172478","url":null,"abstract":"<div><div>A photonic assisted radar utilizing multiband linearly frequency modulated (LFM) signal with increased bandwidth, combined with FSK data transmission is proposed in this work. In this scheme, gain switched vertical cavity surface emitting laser (VCSEL) is exploited to generate multiband LFM radar signal, when a baseband LFM signal is given as input. Simulation results verified the generation of multiband LFM signals at 5 GHz, 10 GHz, 15 GHz and 20 GHz, with bandwidth of 600 MHz, 1200 MHz, 1800 MHz and 2400 MHz, respectively for 5 GHz LFM input. The LFM frequency bands and their bandwidth are increased N times with respect to the baseband LFM signal. The time bandwidth product reaches a maximum value of 38400 with a range of resolution of 7.5 cm. The radar unambiguous range of 2 targets is estimated as 7.8 m and 7.95 m respectively. The maximum target detection distance is found to be 2.25 km.The demodulation of LFM-FSK signal is demonstrated and achieved a maximum capacity of 100 Mbps. The integrated LFM-FSK signal has the benefit of high immunity towards interference, reduced range ambiguity and finds application in automotive radars, short range tracking, missile guidance and radar networks.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"338 ","pages":"Article 172478"},"PeriodicalIF":3.1,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144604129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced IGTO TFTs via HfO₂-GPTMS hybrid insulation through optimized sol-gel 通过优化的溶胶-凝胶，通过HfO₂-GPTMS混合绝缘增强IGTO tft

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-07-05 DOI: 10.1016/j.ijleo.2025.172475

Lei Zhang, Zeyu Hao, Guangqian Li, Panpan Hu, Dongxu Li, Huan Wang

引用次数: 0

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