Results in Optics最新文献

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

Optical audio signal hiding algorithm based on fractional Fourier transform domain and Gerchberg Saxton phase recovery 基于分数阶傅里叶变换域和Gerchberg - Saxton相位恢复的光学音频信号隐藏算法

IF 3

Results in Optics Pub Date : 2025-09-25 DOI: 10.1016/j.rio.2025.100898

Hang Chen , Zhenduo Ma , Ziyi Zhang , Zhengjun Liu

引用次数: 0

Temperature distribution simulation and laser performance of Nd:YAG composite laser crystals Nd:YAG复合激光晶体的温度分布模拟及激光性能

IF 3

Results in Optics Pub Date : 2025-09-24 DOI: 10.1016/j.rio.2025.100899

Zhao Chen , Fei Li , Wenpeng Liu , Yufa Zhang , Qingli Zhang

{"title":"Temperature distribution simulation and laser performance of Nd:YAG composite laser crystals","authors":"Zhao Chen , Fei Li , Wenpeng Liu , Yufa Zhang , Qingli Zhang","doi":"10.1016/j.rio.2025.100899","DOIUrl":"10.1016/j.rio.2025.100899","url":null,"abstract":"<div><div>YAG/Nd:YAG and YAG/Nd:YAG/YAG composite laser crystals were fabricated through thermal bonding method. The temperature distribution and laser properties of Nd:YAG, YAG/Nd:YAG and YAG/Nd:YAG/YAG crystals under LD end-pumping conditions were studied. Laser outputs with wavelengths of 1064 nm and 946 nm have been achieved. Temperature simulation results revealed that at 20 W pump power, the YAG/Nd:YAG/YAG crystal exhibited 15 K lower temperature compared to Nd:YAG crystal, with a 33 K reduction in end-face temperature. Under 20 W pumping, the maximum continuous-wave output powers of YAG/Nd:YAG/YAG crystal reached 4.412 W at 1064 nm and 668 mW at 946 nm, corresponding to slope efficiencies of 34.66 % and 6.68 %, and optical-to-optical conversion efficiencies of 34.77 % and 5.99 %, respectively. These values represent 1.6-fold and 1.8-fold improvements in output power, 13.4 % and 4.33 % enhancements in slope efficiency, as well as 9.31 % and 3.92 % increases in conversion efficiency compared to Nd:YAG crystal. Moreover, the YAG/Nd:YAG/YAG crystal demonstrated superior beam quality with lower M<sup>2</sup> factors than both Nd:YAG/YAG composite crystal and Nd:YAG crystal. It is shown that the composite YAG/Nd:YAG/YAG crystal has better cooling efficiency, which is beneficial to reduce the thermal lens effect and improve the laser efficiency.</div></div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":"21 ","pages":"Article 100899"},"PeriodicalIF":3.0,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145219344","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