Results in Optics最新文献_第2页

Study of CNTs deposition in capillary fiber optics tip structures 毛细管光纤尖端结构中碳纳米管沉积的研究

IF 3

Results in Optics Pub Date : 2025-10-03 DOI: 10.1016/j.rio.2025.100910

Daniel A. May-Arrioja , Andres Camarillo-Aviles , Ivan Salgado-Transito , Natanael Cuando-Espitia

{"title":"Study of CNTs deposition in capillary fiber optics tip structures","authors":"Daniel A. May-Arrioja , Andres Camarillo-Aviles , Ivan Salgado-Transito , Natanael Cuando-Espitia","doi":"10.1016/j.rio.2025.100910","DOIUrl":"10.1016/j.rio.2025.100910","url":null,"abstract":"<div><div>Incorporating nanometric structures in optical fibers allows for a vast number of possibilities in designing small and robust sensors and thermal devices. We demonstrate the deposition of carbon nanotubes (CNTs) onto a capillary hollow fiber (CF). By means of an uncomplicated deposition technique based on laser light, we show that CNTs are effectively deposited on the tip of a CF. In order to couple light into the silica tube of the CF, we designed and fabricated a multimodal interference (MMI) device that generates a ring-shaped intensity pattern. Once the MMI device is constructed, a CF segment of 50–<span><math><mrow><mn>100</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> is spliced after the multimodal section. Afterward, the fiber device is immersed in a liquid solution that contains CNTs, and laser light is launched to promote CNTs deposition. We tested different optical powers and irradiation times to study the effect of experimental parameters on the deposition features. Our results indicate that for optical powers higher than 34 mW, depositions that cover the fiber end face of the CF can be obtained. Higher powers and longer irradiation times produce thicker layers of CNTs material. Moreover, we demonstrate that deposition may occur not only in the end face of the CF but also in the outer surfaces of the fiber. Finally, numerical simulations have shown that these devices can be used as fiber optic microheaters and thermal traps in bio-related applications.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100910"},"PeriodicalIF":3.0,"publicationDate":"2025-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265259","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

The influence of ambient light spectrum (LED, INC, CFL, Xenon…) on the efficiency of perovskite indoor photovoltaic solar cells for Internet of Things (IoT) applications 环境光谱（LED， INC， CFL，氙…）对物联网（IoT）应用钙钛矿室内光伏太阳能电池效率的影响

IF 3

Results in Optics Pub Date : 2025-09-29 DOI: 10.1016/j.rio.2025.100904

Youssef El Arfaoui, Abdennaceur Karoui

{"title":"The influence of ambient light spectrum (LED, INC, CFL, Xenon…) on the efficiency of perovskite indoor photovoltaic solar cells for Internet of Things (IoT) applications","authors":"Youssef El Arfaoui, Abdennaceur Karoui","doi":"10.1016/j.rio.2025.100904","DOIUrl":"10.1016/j.rio.2025.100904","url":null,"abstract":"<div><div>Perovskite solar cells PSCs show excellent performance for outdoor applications; Nevertheless, they hold significant potential for application under artificial lighting. However, both experimental and theoretical research about the use of PSCs for indoor light harvesting remain overlooked. In this work, a PSC has been designed as FTO/TiO<sub>2</sub>/MAGeI<sub>3</sub>/Spiro-OMeTAD and investigated under air mass 1.5G light (Sun), LED light, and Incandescent light (INC), Compact Fluorescent Light (CFL), Flashlight, and Xenon illumination employing SCAPS-1D. Initially, the efficiency is 15.47 % 34.23 % 15.01 % 33.92 % 32.40 % 21.40 % under Sun, LED, INC, CFL, Flash, Xenon, respectively. After that, the effect of the thickness and bap gap of the MAGeI<sub>3</sub> absorber under the studied ambient lights has also been studied and reached 16.09 % 36.09 % 17.8 % 35.25 % 35.17 % and 22.92 % as a PCE, respectively. This inspection of MAGeI<sub>3</sub>-based perovskite for indoor application supports the deployment of indoor PSCs for Internet of Things devices.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100904"},"PeriodicalIF":3.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219341","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

Engineering the optical and gas sensing properties of TiO2 via controlled Cu doping 通过控制Cu掺杂来设计TiO2的光学和气敏性能

IF 3

Results in Optics Pub Date : 2025-09-29 DOI: 10.1016/j.rio.2025.100907

Mohammad Mahdi Shahidi, Esmaeil Salahi

{"title":"Engineering the optical and gas sensing properties of TiO2 via controlled Cu doping","authors":"Mohammad Mahdi Shahidi, Esmaeil Salahi","doi":"10.1016/j.rio.2025.100907","DOIUrl":"10.1016/j.rio.2025.100907","url":null,"abstract":"<div><div>In this study, Cu-doped TiO<sub>2</sub> thin films were successfully fabricated by magnetron sputtering at room temperature, with controlled Cu concentrations achieved through the introduction of Cu strips onto the TiO<sub>2</sub> target. Among them, the TiO<sub>2</sub> sample The structural, optical, electrical, and gas sensing properties of the films were systematically analyzed using multiple characterization techniques. FESEM and AFM analyses revealed significant morphological changes and increased surface roughness with higher Cu doping, leading to the formation of Cu-rich clusters. UV–Vis spectroscopy demonstrated a redshift in the absorption edge and a narrowing of the optical bandgap, accompanied by an increase in Urbach energy, indicating enhanced structural disorder. Hall effect measurements showed a transition from conventional n-type to p-type conductivity. Gas sensing tests revealed that all samples exhibited an unusual increase in resistance upon ethanol exposure, indicating p-type behavior. Among them, the TiO<sub>2</sub> sample with the highest Cu content achieved the greatest sensitivity (5.44) and the fastest recovery time (20.48 s). These results demonstrate that Cu doping effectively modifies the structural and electronic properties of TiO<sub>2</sub>, providing a promising approach for the development of high-performance p-type metal oxide gas sensors.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100907"},"PeriodicalIF":3.0,"publicationDate":"2025-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219343","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

A computational study of advanced hexagonal PCF (H-PCF) bio sensor for breast cancer identification 先进六边形PCF （H-PCF）生物传感器乳腺癌识别的计算研究

IF 3

Results in Optics Pub Date : 2025-09-28 DOI: 10.1016/j.rio.2025.100908

A.Alice Linsie, K. Lalitha, G. Annapoorani

{"title":"A computational study of advanced hexagonal PCF (H-PCF) bio sensor for breast cancer identification","authors":"A.Alice Linsie, K. Lalitha, G. Annapoorani","doi":"10.1016/j.rio.2025.100908","DOIUrl":"10.1016/j.rio.2025.100908","url":null,"abstract":"<div><div>A novel hexagonal Photonic Crystal Fiber (PCF) with good sensitivity for the non-disruptive detection of breast cancer operating over terahertz (THz) regime has been reported in this study. The cladding region of this proposed H-PCF is made up of three layers of hexagonal air holes arranged in a triangular lattice structure. There is one hexagonal air hole in the middle that serves as a hollow core for studying the PCF during sensing operations. This core provides an index difference between the core, cladding, and background material, allowing efficient THz wave propagation and great sensitivity. Through simulation on COMSOL software, the compact arrangement of hexagonal air holes in this way facilitates a birefringence of 1.4 × 10<sup>−3</sup>, a minimum effective material loss (EML) of 1.22 × 10<sup>−3</sup> cm<sup>−1</sup>, a maximum core power fraction of 91.2 %, a maximum sensitivity of 99.83 %, and a very narrow effective area of 0.0375 µm<sup>2</sup> under a wide frequency band of 0.1–1.5 THz. The suggested H-PCF is a good alternative for PCF-based sensing devices because it of these unique features.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100908"},"PeriodicalIF":3.0,"publicationDate":"2025-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219342","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 of gold, silver-gold nanoparticles incorporated to carbon paint for electrodes application in thin-film solar cells 将金、银、金纳米颗粒掺入碳漆中用于薄膜太阳能电池电极的研究

IF 3

Results in Optics Pub Date : 2025-09-28 DOI: 10.1016/j.rio.2025.100905

Patricia Horta-Fraijo, H.Moreno- García

引用次数: 0

Multi-band graphene-nested rings terahertz wave absorber with air gap for sensitive healthcare biosensing applications 多波段石墨烯嵌套环太赫兹波吸收器与气隙敏感的医疗保健生物传感应用

IF 3

Results in Optics Pub Date : 2025-09-28 DOI: 10.1016/j.rio.2025.100911

Seyed Mahmoud Hoseini , Hadi Dehbovid , Seyed Mehdi Abedi Pahnehkolaei , Mehdi Radmehr

引用次数: 0

Investigation of strain-induced modulation on electronic and optical properties of monolayer of BSb 应变诱导调制对BSb单层电子学和光学性质的影响

IF 3

Results in Optics Pub Date : 2025-09-26 DOI: 10.1016/j.rio.2025.100900

Raad Chegel , Ahmad I. Ayesh

{"title":"Investigation of strain-induced modulation on electronic and optical properties of monolayer of BSb","authors":"Raad Chegel , Ahmad I. Ayesh","doi":"10.1016/j.rio.2025.100900","DOIUrl":"10.1016/j.rio.2025.100900","url":null,"abstract":"<div><div>This work presents a comprehensive theoretical investigation of the electronic and optical responses of monolayer honeycomb boron antimony (h-BSb) and hexagonal boron phosphide (h-BP) under various biaxial strain conditions, employing a tight-binding approach validated through DFT calculations. Our findings reveal that monolayer h-BSb possesses a direct band gap that can be effectively modulated through mechanical strain: tensile strain raises the band gap, whereas compressive strain decreases it. This strain-induced tunability manifests directly in the optical spectra, where prominent optical peaks exhibit significant redshifts under compressive strain and blueshifts under tensile conditions. The refractive index <span><math><mrow><mi>n</mi><mo>(</mo><mi>ω</mi><mo>)</mo></mrow></math></span> demonstrates clear strain-dependent modulations, with the zero-frequency value increasing under compressive strain and decreasing under tensile deformation. Additionally, the DC Kerr effect displays a distinctive double-peak structure that shows high sensitivity to mechanical strain. Comparative analysis demonstrates that monolayer h-BSb exhibits lower-energy optical transitions and enhanced sensitivity to strain-induced peak displacement compared to h-BP. This superior performance stems from h-BSb’s small band gap and narrow interband separations at the points of high-symmetry in the Brillouin zone. These characteristics position h-BSb as a highly promising material for strain-engineered optoelectronic applications, particularly in infrared photodetectors and sensors.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100900"},"PeriodicalIF":3.0,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219347","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

Low-power all-optical photonic crystal synapse using Ge2Sb2Te5 phase-change material 采用Ge2Sb2Te5相变材料制备的低功耗全光光子晶体突触

IF 3

Results in Optics Pub Date : 2025-09-25 DOI: 10.1016/j.rio.2025.100901

Amir Hossein Abdollahi Nohoji, Parviz Keshavarzi, Mohammad Danaie

{"title":"Low-power all-optical photonic crystal synapse using Ge2Sb2Te5 phase-change material","authors":"Amir Hossein Abdollahi Nohoji, Parviz Keshavarzi, Mohammad Danaie","doi":"10.1016/j.rio.2025.100901","DOIUrl":"10.1016/j.rio.2025.100901","url":null,"abstract":"<div><div>In this study, we propose an all-optical neuromorphic photonic crystal synapse structure equipped with a Ge<sub>2</sub>Sb<sub>2</sub>Te<sub>5</sub> phase-change material (GST-PCM). By leveraging the unique properties of the GST-PCM material, this structure enables the control of the synaptic weight through targeted and focused laser irradiation. 3D simulations employing the finite-difference time-domain (FDTD) and finite element method (FEM) demonstrated optical transmission exceeding 99 % and reflection below −20 dB at a wavelength of 1504 nm within the proposed structure. These features, together with their compact dimensions and low power consumption, make our proposed structure an ideal candidate for optical processing applications and neuromorphic neural networks. Furthermore, we investigated the physical and thermal equations to determine the crystallization fraction of GST-PCM during the synapse weighting process. These equations showed excellent agreement with the simulation results and could accurately calculate the GST-PCM crystallization fraction as a function of time and laser power. Our proposed structure not only has the potential to be extended to neuromorphic systems and optical neural networks but also serves as an innovative platform for all-optical synapses because of its precise control of optical properties, high adaptability, and low power consumption.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100901"},"PeriodicalIF":3.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145157217","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

Design and Theory of Characteristic Mode Analysis (TCMA) of 4 × 4 high isolation MIMO antenna for sub-6GHz 5G communications 用于sub-6GHz 5G通信的4 × 4高隔离MIMO天线的特性模态分析（TCMA）设计与理论

IF 3

Results in Optics Pub Date : 2025-09-25 DOI: 10.1016/j.rio.2025.100903

Bhaskara Rao Perli , Tathababu Addepalli , Arashpreet K. Sohi , Sivasubramanyam Medasani , Manish Sharma , Imran Mohd Ibrahim , Ahmed J.A.Al–Gburi

{"title":"Design and Theory of Characteristic Mode Analysis (TCMA) of 4 × 4 high isolation MIMO antenna for sub-6GHz 5G communications","authors":"Bhaskara Rao Perli , Tathababu Addepalli , Arashpreet K. Sohi , Sivasubramanyam Medasani , Manish Sharma , Imran Mohd Ibrahim , Ahmed J.A.Al–Gburi","doi":"10.1016/j.rio.2025.100903","DOIUrl":"10.1016/j.rio.2025.100903","url":null,"abstract":"<div><div>This present work investigates a compact 4 × 4 cup-shaped Multi-Input Multi-Output (MIMO) antenna using Characteristic Mode Analysis (CMA). The systematic design procedure with six characteristic modes allows the antenna to operate at the working frequency of 3.5 GHz. Physical insight into one-element and four-element radiating structures is gained by analysing modal significance, modal fields, and surface currents. The 4 × 4 MIMO structure works in a narrow frequency band of 2.8 to 4.6 GHz. The total size of the MIMO model is 53 × 53 × 1.6 mm3 and is printed on an inexpensive flame-retardantsubstrate<sub>.</sub> The plus-shaped decoupling network and the orientation of the radiating patch provide a strong isolation of more than 20 dB across the operating band. The diversity MIMO performance the antenna provides good results with ECC < 0.000005, DG > 9.9999 dB, TARC < − 10 dB, CCL < 0.02b/s/Hz, and MEG ≅ − 3.0 dB. These antenna features make the MIMO design suitable for sub-6 GHz 5G communications.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100903"},"PeriodicalIF":3.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219345","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

Dispersive near-infrared metalens integrated with linear polarization filtering functionality 具有线性偏振滤波功能的色散近红外超透镜

IF 3

Results in Optics Pub Date : 2025-09-25 DOI: 10.1016/j.rio.2025.100902

Tae Young Kang , ByungSuk Lee , Seunghun Lee , Seonyong An , Robert A. Taylor , Kyoungchun Kwon , Kyujung Kim

{"title":"Dispersive near-infrared metalens integrated with linear polarization filtering functionality","authors":"Tae Young Kang , ByungSuk Lee , Seunghun Lee , Seonyong An , Robert A. Taylor , Kyoungchun Kwon , Kyujung Kim","doi":"10.1016/j.rio.2025.100902","DOIUrl":"10.1016/j.rio.2025.100902","url":null,"abstract":"<div><div>The miniaturization and enhanced functionality of LiDAR systems present critical challenges in automotive sensing technologies, particularly in achieving efficient wide-angle beam scanning while maintaining compact form factors. We demonstrate a novel dual-wavelength polarization-selective concave metalens operating at 904 nm and 940 nm wavelengths, the standard operating wavelengths for LiDAR systems. By engineering rectangular TiO<sub>2</sub> nanopillars on a quartz substrate, we achieved simultaneous polarization filtering and concave phase profile functionality within a single metasurface layer. The optimized 600 nm × 600 nm unit cell design with 1.7 μm height nanopillars enables full 2π phase coverage while maintaining high transmission efficiency for the desired polarization state. Our fabricated metalens exhibits remarkable polarization extinction ratios (ER) of 124:1 and 102:1 at 904 nm and 940 nm wavelengths, respectively. Angular-resolved measurements demonstrate wide beam divergence angles of 148° and 138° at the respective wavelengths, with 50 % of total power contained within ± 38° and ± 25°.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100902"},"PeriodicalIF":3.0,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265257","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