IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-29 DOI: 10.1016/j.ijleo.2025.172381

Siam Sarker , Fuad Hassan Faruk , Habibur Rahman , Md. Mahabub Hossain , Seong Ho Kong

{"title":"Design and performance analysis of a dual-core gold-coated PCF-based plasmonic RI sensor for the detection of bio-analytes","authors":"Siam Sarker , Fuad Hassan Faruk , Habibur Rahman , Md. Mahabub Hossain , Seong Ho Kong","doi":"10.1016/j.ijleo.2025.172381","DOIUrl":"10.1016/j.ijleo.2025.172381","url":null,"abstract":"<div><div>This paper presents a straightforward sensor design based on a surface plasmon resonance (SPR) mechanism, utilizing a gold-coated dual-core type photonic crystal fiber (DCPCF-SPR) for the detection of diverse bioorganic biochemical analytical molecules in the spectral ranges of visible to near infrared (0.5–2 μm) wavelength. With two major hexagonal ring lattices and many circular air holes, the sensor construction is made to be less complicated, and the external surface of the designed structure is coated by a layer of gold (Au) that is 40 nm depth as plasmonic material depending on chemical adoption and excellent sensing performance. employing the finite element method (FEM), the detecting functions were examined for the chemical analytes in the measurement of refractive index range from 1.33 to 1.42. The maximal wavelength sensitivity (WS) and amplitude sensitivity (AS) of the proposed sensor were 27,000 nm/RIU and 1701.69 RIU<sup>−1</sup> with the resolutions of 3.70 × 10<sup>−6</sup> RIU and 5.88 × 10<sup>−6</sup> RIU, respectively, and 482 RIU<sup>−1</sup> was found as a maximum figure of merit (FOM). Placing the plasmonic material and analyte sensing layer on the DCPCF's outside is noteworthy in the design, as it indicates the feasibility of easier manufacturing processes. Following to these outcomes and a simple structural design, the suggested distinctive sensor can be potentially applicable for refractive index (RI) detecting the biochemical solutions, biomolecular substances, and biological samples.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"332 ","pages":"Article 172381"},"PeriodicalIF":3.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143898615","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

Temperature-dependence of the optical transitions of spray pyrolysis derived Sn doped Co3O4 thin films 喷雾热解衍生锡掺杂Co3O4薄膜光学跃迁的温度依赖性

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-27 DOI: 10.1016/j.ijleo.2025.172372

T. Zribi , M.-B. Bouzourâa , H. Essaidi , S. Touihri , A. Boukhachem , A. En Naciri

{"title":"Temperature-dependence of the optical transitions of spray pyrolysis derived Sn doped Co3O4 thin films","authors":"T. Zribi , M.-B. Bouzourâa , H. Essaidi , S. Touihri , A. Boukhachem , A. En Naciri","doi":"10.1016/j.ijleo.2025.172372","DOIUrl":"10.1016/j.ijleo.2025.172372","url":null,"abstract":"<div><div>Understanding the temperature dependence of physical properties is essential for optimizing the performance of Co<sub>3</sub>O<sub>4</sub> films, particularly with respect to their optical behavior. Previous studies have shown that Sn doping can influence the physical characteristics of Co<sub>3</sub>O<sub>4</sub> films. In this work, the temperature-dependent optical properties of undoped and 2 mol% Sn doped Co<sub>3</sub>O<sub>4</sub> (SCO) thin films, deposited on glass substrates via the spray pyrolysis technique, are investigated. The temperature effects were investigated using Raman, UV-Vis-IR spectroscopy and <em>in-situ</em> ellipsometry measurements. Raman analysis demonstrated that room temperature to 623 K domain is notably interesting as a stable single-phase range for both samples. Through an exhaustive ellipsometric analysis, including experimental and modeling studies, the evolution with temperature of key optical parameters such as film thickness, dielectric function, absorption coefficient, transition energies and Urbach energies have been successfully determined. The results highlight the influence of the applied heating on the optical responses. Particularly, the electronic transitions were found to decrease as the temperature increases. This dependence was analysed using the well-known Varshni model and the corresponding physical parameters were extracted.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"331 ","pages":"Article 172372"},"PeriodicalIF":3.1,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143891737","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

Method to identify optical path transmittance by using cat’s-eye retroreflectors 利用猫眼反射镜识别光路透射率的方法

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-26 DOI: 10.1016/j.ijleo.2025.172350

Hiroki Natsume , Sin-iti Kitazawa , Kunpei Nojiri , Kazuhiro Torimoto , Eiichi Yatsuka , Tomohiro Yokozuka , Takanori Kikuchi , Yoshihiko Nunoya

引用次数: 0

Double phase modulation architecture for Montgomery effect 蒙哥马利效应的双相位调制结构

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-26 DOI: 10.1016/j.ijleo.2025.172361

I. Rincón, D. Sánchez-De-la-Llave, U. Ruiz, M.C. Alonso

引用次数: 0

Accurate indoor visible light positioning method using four LEDs and a smartphone camera 使用四个led和一个智能手机摄像头的精确室内可见光定位方法

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-25 DOI: 10.1016/j.ijleo.2025.172346

Kheira Amari, Mokhtar Keche

引用次数: 0

Research progress of laser cleaning technology for industrial fields in the past decade 近十年来工业领域激光清洗技术的研究进展

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-24 DOI: 10.1016/j.ijleo.2025.172354

Guisheng Fang , Yehang Pan , Daming Wu , Wei Zhao

引用次数: 0

Design and implementation of a diffraction-based common-path digital holographic microscopy system with programmable beams 基于衍射的可编程光束共程数字全息显微系统的设计与实现

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-24 DOI: 10.1016/j.ijleo.2025.172352

Deepak Kumar, Biswajit Pathak, C.S. Narayanamurthy

引用次数: 0

Integration of advanced chemometric and machine learning techniques: Stacking model and XGBoost dynamic correction for aniline detection with an unmodified carbon paste electrode 集成先进的化学计量学和机器学习技术：用未修饰的碳糊电极进行苯胺检测的堆叠模型和XGBoost动态校正

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-22 DOI: 10.1016/j.ijleo.2025.172369

Meryem NINI, Mohamed NOHAIR

{"title":"Integration of advanced chemometric and machine learning techniques: Stacking model and XGBoost dynamic correction for aniline detection with an unmodified carbon paste electrode","authors":"Meryem NINI, Mohamed NOHAIR","doi":"10.1016/j.ijleo.2025.172369","DOIUrl":"10.1016/j.ijleo.2025.172369","url":null,"abstract":"<div><div>This study proposes a novel Chemometric approach for the precise and reliable quantification of aniline using an unmodified carbon paste electrode (CPE), even in the presence of interfering species such as phenol. The proposed methodology integrates partial least squares (PLS), random forest (RF) and ridge regression in a stacked model framework, combined with particle swarm optimization (PSO) for potential selection. To enhance the prediction accuracy, a dynamic correction based on XGBoost was applied, which effectively minimized residual errors and improved model robustness. The model developed demonstrated high performance on the training (R<sup>2</sup> = 0.9993, RMSE = 0.6260 and MAE = 0.4773), test (R<sup>2</sup> = 0.9979, RMSE = 0.7616 and MAE = 0.6839) and cross-validation datasets (R<sup>2</sup> = 0.9988, RMSE = 0.8312 and MAE = 0.5467), thus confirming its stability and reliability. The high coefficient of determination (R2), as well as the low root mean square error (RMSE) and mean absolute deviation (MAE) values, underscore the model's robust predictive capabilities and its capacity to accommodate intricate electrochemical interactions. Moreover, the calculated recovery rates and tolerance limits signify high precision and consistency across varying concentration levels. Utilizing an unmodified EPC, this approach proffers a cost-effective, sensitive, and selective strategy for aniline quantification, rendering it especially well-suited for environmental and industrial monitoring. The model's strong predictive capabilities underscore its potential for real-world contaminant detection, offering a reliable solution for complex analytical environments.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172369"},"PeriodicalIF":3.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143869344","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

Retraction notice “Cloud data storage with improved resource scheduling in healthcare application based on security system” [Optik 272 (2023) 170225] 撤销通知“基于安全系统的医疗保健应用中改进资源调度的云数据存储”[Optik 272 (2023) 170225]

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-22 DOI: 10.1016/j.ijleo.2025.172321

Santosh Vishwakarma , Rajat Subhra Goswami , Saibal Dutta , V. Sakthivel , P. Prakash , P. Vijayakumar , Lakshmi Thangavelu

引用次数: 0

A novel PAPR reduction scheme for image transmission with ACO-OFDM VLC systems using chaotic scrambling and µ-modified logarithmic companding 基于混沌置乱和微修正对数压缩的ACO-OFDM VLC系统图像传输PAPR降低方案

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-22 DOI: 10.1016/j.ijleo.2025.172363

Elhadi Mehallel , Ammar Bouchemel , Djamel Abed

{"title":"A novel PAPR reduction scheme for image transmission with ACO-OFDM VLC systems using chaotic scrambling and µ-modified logarithmic companding","authors":"Elhadi Mehallel , Ammar Bouchemel , Djamel Abed","doi":"10.1016/j.ijleo.2025.172363","DOIUrl":"10.1016/j.ijleo.2025.172363","url":null,"abstract":"<div><div>Visible-light communication (VLC) systems adopt orthogonal frequency-division-multiplexing (OFDM) modulation for high-data-rate transmission, as it offers better resistance to multipath fading and inter-symbol interference (ISI). However, a major challenge in ACO-OFDM-based VLC systems is high peak-to-average-power-ratios (PAPRs), which can degrade system performance. This paper proposes a combined chaotic scrambling and µ-nonlinear logarithmic companding transform scheme to solve the high PAPR problem and enhance image transmission quality in ACO-OFDM based-VLC systems. The proposed scheme utilizes the chaotic Arnold’s cat map-based scrambling (ACMS) for shuffling image pixels before modulation to improve image transmission quality and reduce PAPR. Moreover, a µ-modified logarithmic companding transform (µ-MLCT) is investigated to enhance the peak signal-to-noise ratio (PSNR), bit-error-ratio (BER), and reduce PAPR. ACMS can provide both data encryption and PAPR reduction. Simulation results confirm the effectiveness of the proposed scheme, which gives PSNR and BER improvements of about 52 dB and 3.5 dB in SNR, respectively, and achieves a PAPR reduction of about 12 dB. Moreover, it can not only achieve high image transmission security but also improve image quality and reduce PAPR in the ACO-OFDM-based VLC system without affecting PSNR and BER performance.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"330 ","pages":"Article 172363"},"PeriodicalIF":3.1,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143875063","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

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