IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-05-03 DOI: 10.1016/j.ijleo.2025.172367

Hassan Al-Ahsab , Mingjian Cheng , Ibrahim G.H. Loqman , Shukri Kaid , Abdu A. Alkelly

引用次数: 0

Water pressure-assisted gold nanoparticle synthesis via pulsed laser ablation in liquid: A simple approach to controlling size distribution 通过脉冲激光烧蚀在液体中合成水压力辅助金纳米颗粒：一种控制尺寸分布的简单方法

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-05-01 DOI: 10.1016/j.ijleo.2025.172382

Naser M. Ahmed , Siti Azrah Mohamad Samsuri , Adhraa Hameed Jasim , Nur Aleesya binti Mohd. Radzi , Nor Fatin Nabilah binti Omar , Munirah A. Almessiere , Suvindraj Rajamanickam

引用次数: 0

Enhancing a bimetallic temperature highly-sensitive nanosensor based on surface plasmon resonance 基于表面等离激元共振的双金属温度高灵敏度纳米传感器

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-29 DOI: 10.1016/j.ijleo.2025.172366

Fatima Houari , Mohamed El barghouti , Abdellah Mir , Abdellatif Akjouj

引用次数: 0

Optimized plasmonic metasurface for efficient ablating of cancer and tumor cells 优化等离子体超表面，有效消融癌症和肿瘤细胞

IF 3.1 3区物理与天体物理

Optik Pub Date : 2025-04-29 DOI: 10.1016/j.ijleo.2025.172380

Leila Ghasemzadeh, Karim Abbasian, Sajjad Mortazavi

{"title":"Optimized plasmonic metasurface for efficient ablating of cancer and tumor cells","authors":"Leila Ghasemzadeh, Karim Abbasian, Sajjad Mortazavi","doi":"10.1016/j.ijleo.2025.172380","DOIUrl":"10.1016/j.ijleo.2025.172380","url":null,"abstract":"<div><div>Photothermal therapy (PTT) offers a promising approach to cancer treatment by elevating tumor tissue temperature, however, it requires efficient light-to-heat conversion at the target site. Qualified nanostructures with optimized absorption for effective PTT remain a key challenge. Then, we propose and numerically investigate plasmonic perfect absorber (PPA) metasurfaces, specifically gold nanodisc arrays (NDAs) and multi-hole arrays (MHAs), designed for enhanced light absorption, which is consistent with cancer cell ablation. Using the Finite-Difference Time-Domain (FDTD) method implemented in Ansys-Lumerical FDTD Solutions, we systematically analyzed the impact of geometric parameters (circular vs. elliptical shapes, varying diameters from 600 nm to 900 nm for NDAs and 400 nm to 800 nm for MHAs, maintaining a 1:2 diameter-to-period ratio) and dielectric spacer materials (SiO₂ and Si) on the reflection and absorption spectra in the near-infrared range. The findings indicate that Au-SiO₂-Au NDA structures with a diameter of 600 nm exhibit significantly reduced reflection (approx. 28 %) and thus high absorption (approx. 72 %) at a resonance wavelength of 3.8 µm. Furthermore, oval NDAs with a small diameter of 600 nm and a SiO₂ spacer layer of 60 nm show superior performance where the absorption cross-section exceeds the scattering cross-section. According to Kirchhoff's law of thermal radiation (A=E), the high absorption efficiency translates to a strong potential for thermal emission, highlighting the suitability of these optimized PPAs as efficient transducers for localized heat generation in photothermal therapy applications.</div></div>","PeriodicalId":19513,"journal":{"name":"Optik","volume":"332 ","pages":"Article 172380"},"PeriodicalIF":3.1,"publicationDate":"2025-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143906556","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

Design and performance analysis of a dual-core gold-coated PCF-based plasmonic RI sensor for the detection of bio-analytes 用于检测生物分析物的双核镀金pcf等离子体RI传感器的设计和性能分析

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

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

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

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