Results in Optics最新文献_第3页

Revisiting optical absorption power density of inhomogeneous plane waves 重温非均质平面波的光吸收功率密度

Results in Optics Pub Date : 2024-07-01 DOI: 10.1016/j.rio.2024.100728

{"title":"Revisiting optical absorption power density of inhomogeneous plane waves","authors":"","doi":"10.1016/j.rio.2024.100728","DOIUrl":"10.1016/j.rio.2024.100728","url":null,"abstract":"<div>We review the analytical expressions for the complex Poynting’s vector in the case of arbitrary plane-waves in a lossy isotropic medium. We demonstrate how these expressions can be used to recover the optical absorption power density <math><mi>Q</mi></math>, considering the divergence of the time-averaged Poynting vector. This quantity, proportional to the imaginary part of the dielectric function and the field intensity, i.e. <math><mrow><mi>Q</mi><mo>∝</mo><msup><mrow><mrow><mo>|</mo><mi>E</mi><mo>|</mo></mrow></mrow><mrow><mn>2</mn></mrow></msup><mi>ɛ</mi></mrow></math>”, is usually established for harmonic fields, using the Poynting’s identity. The derivation from the complex Poynting vector expression is more direct for TE-polarized homogeneous waves, but the derivation encompasses the other cases like inhomogeneous TM plane waves. As an application, the optical absorption profile <math><mrow><mi>Q</mi><mrow><mo>(</mo><mi>x</mi><mo>)</mo></mrow></mrow></math> within 1D multilayers is detailed using matrix transfer method for both TE and TM plane waves, including the evanescent case.</div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666950124001251/pdfft?md5=e01ff260595dacac0fa279a806ecdc8f&pid=1-s2.0-S2666950124001251-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141954167","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of annealing and roughness on the magnetic-optical, adhesive, nano-mechanical, and electrical properties of Co60Fe20Dy20 films 退火和粗糙度对 Co60Fe20Dy20 薄膜的磁光、粘合、纳米机械和电气性能的影响

Results in Optics Pub Date : 2024-07-01 DOI: 10.1016/j.rio.2024.100636

{"title":"Effect of annealing and roughness on the magnetic-optical, adhesive, nano-mechanical, and electrical properties of Co60Fe20Dy20 films","authors":"","doi":"10.1016/j.rio.2024.100636","DOIUrl":"10.1016/j.rio.2024.100636","url":null,"abstract":"<div>The structural, magnetic, optical, and adhesion properties of Cobalt-Iron-Dysprosium (CoFeDy) films were investigated in this study. Glass substrates were coated with a Co60Fe20Dy20 alloy via sputtering, with a thickness ranging from 10 nm to 50 nm. Subsequently, the films underwent annealing at temperatures of 100 °C, 200 °C, and 300 °C for one hour. X-ray diffraction (XRD) analysis confirmed the amorphous nature of the deposited CoFeDy films under four distinct conditions. Notably, a thickness-dependent increase in low-frequency alternate-current magnetic susceptibility (χac) was observed. After annealing at 300 °C, CoFeDy films exhibited the highest χac compared to other temperatures. Surface roughness exhibited a decreasing trend with rising annealing temperature, as observed through atomic force microscopy (AFM) experiments. The maximum surface energy of CoFeDy films was achieved at a thickness of 50 nm following annealing at 300 °C. Higher surface energy was indicative of stronger adhesion efficiency. Furthermore, lower resistance and sheet resistance values were obtained through annealing at higher temperatures, suggesting that increasing thickness and reducing electron transport barriers enhanced electron conductivity. As film thickness increased, transmittance decreased due to the thickness effect, suppressing the photon signal. Consequently, rougher surfaces were associated with improved performance in magnetism, electrical adhesion, and optics, attributed to reduced domain pinning, enhanced carrier conductivity, and minimized light scattering.</div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666950124000336/pdfft?md5=225a024663efb8220da2f3469975d496&pid=1-s2.0-S2666950124000336-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139875179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The impact of lithium concentration on the optical properties of colloidal ZnO nanocrystals 锂浓度对胶体氧化锌纳米晶体光学特性的影响

Results in Optics Pub Date : 2024-07-01 DOI: 10.1016/j.rio.2024.100733

引用次数: 0

Angle-tuned optical interleaver based on Fabry–Perot cavities with reconfigurable angle range 基于可重新配置角度范围的法布里-珀罗空腔的角度调谐光学交织器

Results in Optics Pub Date : 2024-07-01 DOI: 10.1016/j.rio.2024.100722

引用次数: 0

Exploration of skewness parameter of Skew-Cosh-Gaussian laser beam propagating through collisionless plasma 探索在无碰撞等离子体中传播的 Skew-Cosh-Gaussian 激光束的偏斜参数

Results in Optics Pub Date : 2024-07-01 DOI: 10.1016/j.rio.2024.100724

K.Y. Khandale , S.D. Patil , M.V. Takale

{"title":"Exploration of skewness parameter of Skew-Cosh-Gaussian laser beam propagating through collisionless plasma","authors":"K.Y. Khandale , S.D. Patil , M.V. Takale","doi":"10.1016/j.rio.2024.100724","DOIUrl":"https://doi.org/10.1016/j.rio.2024.100724","url":null,"abstract":"<div>The skewness parameter ‘s’ of a skew-cosh-Gaussian (skew-chG) laser beam travelling through collisionless plasma was analytically investigated in the current theoretically study. In this problem, the self-focusing and defocusing of a skew-chG beam in collisionless plasma has been studied successfully by utilising the Akhmanov’s parabolic equation technique under Wentzel-Kramers-Brillouin (WKB) and paraxial approximations. The dielectric function of plasma under consideration here exhibits ponderomotive type nonlinearity. Our primary goal is to understand how the skewness parameter affects the beam-width parameter changes during plasma propagation. It is observed that the skewness parameter ‘s’ is more noticeable at a higher order of skewness ‘n’ of the skew-chG laser beams. With increasing skewness parameter the critical curves shifts downward and the enhanced self-focusing is observed and the rate of defocusing is decreases. It has been found that improved self-focusing in plasma depends on optimising the skewness parameter ‘s’ of the skew-chG laser beam. The results are revealed graphically and discussed.</div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666950124001214/pdfft?md5=cf5e184756cd016553b5ac92e9e65d40&pid=1-s2.0-S2666950124001214-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141540782","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Aging characterization of thermally aged transformer paper based on its reflectance 根据热老化变压器纸的反射率确定其老化特征

Results in Optics Pub Date : 2024-07-01 DOI: 10.1016/j.rio.2024.100716

Najmeh Seifaddini , Issouf Fofana , N.V.P.S. Rajesh Kandala , Kok-Sing Lim , Cheong-Weng Ooi , Waldo Udos , Bekibenan Sekongo , Abdellah Chehri , Mohand Ouhrouche , Gautam Leena

{"title":"Aging characterization of thermally aged transformer paper based on its reflectance","authors":"Najmeh Seifaddini , Issouf Fofana , N.V.P.S. Rajesh Kandala , Kok-Sing Lim , Cheong-Weng Ooi , Waldo Udos , Bekibenan Sekongo , Abdellah Chehri , Mohand Ouhrouche , Gautam Leena","doi":"10.1016/j.rio.2024.100716","DOIUrl":"https://doi.org/10.1016/j.rio.2024.100716","url":null,"abstract":"<div>In this contribution, a simple non-destructive characterization of aging degree of oil-paper insulation materials based on the reflectance is proposed. Samples of cellulose Kraft paper having different thicknesses, were thermally aged in a mineral insulating oil and a synthetic ester with a controlled aging history. The degree of polymerization of the non-aged and aged paper samples was measured according to ASTM D4243 to monitor the cellulose degradation. In addition, the samples were optically analyzed to assess changes in paper’s reflectance. The reflectance spectra of the thermally aged paper samples were statistically analyzed using linear, single variable, and multi-variable analyses by considering eight popular variables. This enables correlating the reflectance to the degree of polymerization and identifying a suitable regression model. Appropriate variable interaction has been performed among which two best-fit models with goodness of fit ≥ 0.9 have been identified. The estimation of the cellulose paper’s DP using the proposed models is reported. The experimental results show that the proposed approach can be used in characterizing aging degree of oil-paper insulation and has the potential to be implemented online as an effective monitoring technique.</div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666950124001135/pdfft?md5=57103f426354938d8b94c807a0f6ca46&pid=1-s2.0-S2666950124001135-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141540781","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation of impact of kesterites as hole transport layer on (FA)2BiCuI6 based ecofriendly double perovskite solar cell to obtain optimized PCE above 25% 研究晶硅作为空穴传输层对基于 (FA)2BiCuI6 的生态友好型双过氧化物太阳能电池的影响，以获得高于 25% 的优化 PCE

Results in Optics Pub Date : 2024-07-01 DOI: 10.1016/j.rio.2024.100731

{"title":"Investigation of impact of kesterites as hole transport layer on (FA)2BiCuI6 based ecofriendly double perovskite solar cell to obtain optimized PCE above 25%","authors":"","doi":"10.1016/j.rio.2024.100731","DOIUrl":"10.1016/j.rio.2024.100731","url":null,"abstract":"<div>This paper presents a detailed study of double perovskite (FA)2BiCuI6 based perovskite solar cells(PSC) using different kesterites as hole transport layers (HTL) and titanium-based electron transport layers (ETL). The designed double perovskite PSC utilized <math><msub><mrow><mi>T</mi><mi>i</mi><mi>O</mi></mrow><mn>2</mn></msub></math> as an ETL, different kesterite materials (CZTSe, CFTS, CBTS, CMTS, CNTS and CZTS) as the HTL, double perovskite material (FA)2BiCuI6 as the perovskite absorption layer (PAL), Indium tin oxide (ITO) as top electrode and Au as an anode. The different parameters of architecture (ITO/TiO2/(FA)2BiCuI6/HTL/Au) is improved via the SCAPS-1D simulator by first optimizing thickness and then the defect density of PAL. Energy band matching of the different layers with (FA)2BiCuI6 is thoroughly investigated in order to understand its operation. AM 1.5G illumination is used as input light source. To obtain optimum performance of (FA)2BiCuI6 based PSC the effects of optical thickness, defect density, temperature, series resistance, and shunt resistance are monitored. Among all the kesterites, CNTS based PSC performed extraordinarily well with PCE of 26.09 %. JSC 22.64 mA/cm2, VOC 1.38 V, FF 83.33 %, and the variables influencing solar cell performance are clarified by simulations. The findings presented in this work will aid researchers in the production of ecofriendly solar cells with great efficiency.</div>","PeriodicalId":21151,"journal":{"name":"Results in Optics","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666950124001287/pdfft?md5=f4dc6447711460bf7be8d0f58e776602&pid=1-s2.0-S2666950124001287-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141842479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Single-Mode versus Multimode Fiber Bragg Grating Temperature Sensors: A Theoretical Study 单模与多模光纤布拉格光栅温度传感器：理论研究

Results in Optics Pub Date : 2024-07-01 DOI: 10.1016/j.rio.2024.100739

引用次数: 0

Optical band gap engineering and comparison of conductivity of CaTiO3 and LiNbO3 doped PVDF films 掺杂 CaTiO3 和 LiNbO3 的 PVDF 薄膜的光带隙工程和导电性比较

Results in Optics Pub Date : 2024-06-22 DOI: 10.1016/j.rio.2024.100720

Clyde Varner , Angela Davis , Ashok K. Batra, Padmaja Guggilla

引用次数: 0

Use of educational technologies in teaching the basics of nanophysics, nanomaterials and nanotechnologies 利用教育技术教授纳米物理学、纳米材料和纳米技术基础知识

Results in Optics Pub Date : 2024-06-21 DOI: 10.1016/j.rio.2024.100717

Dilfuza Begmatova , Husan Eshkuvatov , Nuraddin Abdullayev , Nasiba Xodjayeva , Oqila Suvonova , Javlon Ishtayev

引用次数: 0