Optical Materials Express最新文献_第8页

Functionally switchable terahertz metasurface under linearly polarized and circularly polarized waves incidence 在线性偏振波和圆极化波入射条件下可功能切换的太赫兹元表面

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-15 DOI: 10.1364/ome.509261

Shu-ping Zhang, Jiusheng Li, Fenglei Guo

引用次数: 0

Femtosecond Vector Vortex Laser Ablation in Tungsten: chiral nano-micro texturing and structuring 钨中的飞秒矢量涡旋激光烧蚀：手性纳米微纹理和结构化

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-12 DOI: 10.1364/ome.510141

Haruki Kawaguchi, Ryo Yasuhara, Haotian Yang, Chika Hori, Reina Miyagawa, Koji Sugioka, Masato Ota, H. Uehara

引用次数: 0

MULTI-LAYERED CLADDING BASED ULTRA-LOW LOSS, SINGLE MODE ANTIRESONANT HOLLOW CORE FIBERS 基于多层包层的超低损耗单模反谐振空芯光纤

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-12 DOI: 10.1364/ome.504207

Ruhana Nishad, Lutfun Nahar Asha, K. Shaha, A. B. M. A. Hossain, Abdul Khaleque

引用次数: 0

Broadband multifunctional metasurfaces for concentric perfect vortex beam generation via trigonometric functions 通过三角函数生成同心完美涡流束的宽带多功能元表面

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-11 DOI: 10.1364/ome.510015

Muhammad Danial Shafqat, Nasir Mahmood, Jehan Akbar, Muhammad Zubair, Yehia Massoud, and Muhammad Qasim Mehmood

{"title":"Broadband multifunctional metasurfaces for concentric perfect vortex beam generation via trigonometric functions","authors":"Muhammad Danial Shafqat, Nasir Mahmood, Jehan Akbar, Muhammad Zubair, Yehia Massoud, and Muhammad Qasim Mehmood","doi":"10.1364/ome.510015","DOIUrl":"https://doi.org/10.1364/ome.510015","url":null,"abstract":"Perfect vortex (PV) beams exhibiting topological charge-insensitive annular intensity distribution appear as a striking hotspot for significant advances in optical communication and quantum optics and have great potential to fulfill the requirements of futuristic optical communication systems. The recently developed planar photonics devices possessed an unprecedented ability for complex wavefront shaping at the micron scale; however, the limited working bandwidth and abruptly diverging light behavior of the current PV beam-generating planar photonics devices roadblock their applicability in practical systems. This work demonstrates a single-cell driven broadband planar photonics platform to realize the nondiffracting-type PV beams for the visible spectrum. These PV beams exhibit long propagating constant-sized doughnuts for different topological charges and exhibit expected broadband response. The proposed concept is verified by numerically studying multiple meta-devices capable of generating nondiffracting-type PV beams. The presented photonics platform may bring considerable advances in real-life applications like machine vision.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"38 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138573002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanostructured anti-reflection coating for absorption enhancement in perovskite silicon tandem solar cells 用于增强过氧化物硅串联太阳能电池吸收的纳米结构抗反射涂层

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-11 DOI: 10.1364/ome.503990

B. Kranthi Kumar and Nikhil Deep Gupta

{"title":"Nanostructured anti-reflection coating for absorption enhancement in perovskite silicon tandem solar cells","authors":"B. Kranthi Kumar and Nikhil Deep Gupta","doi":"10.1364/ome.503990","DOIUrl":"https://doi.org/10.1364/ome.503990","url":null,"abstract":"Perovskite-silicon tandem solar cells have captured the attention of the solar cell research community due to the advantages of perovskites, such as, an easy fabrication process using sol-gel methods and silicon bottom cells that can be fabricated using well-established fabrication techniques. The present study discusses the design, optimization, and numerical analysis related to the role of nanostructured anti-reflection coating design for perovskite (MAPbI3) silicon tandem solar cells. In the design, the top cell is taken as MAPbI3 and the bottom cell is C-silicon. The anti-reflection coating is designed with SiO2 nanoparticles embedded in ITO. These nanostructured top anti-reflection coating results are compared with its planar top cell counterpart. SiO2 nanoparticle diameter and interparticle separation are optimized to get maximum absorption in the top cell. Upon optimization, it was found that a design having SiO2 nanoparticles with a diameter of 60 nm and no interparticle separation showed the most reduction in reflection, which in turn led to an increase in absorption in the top cell. The proposed structure enhances current density by 8.3% over the planar cell. This top cell current is matched to the bottom silicon thickness. These findings were validated using Mie scattering and the Bruggmann effective medium approximation.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"38 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138573263","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Super-hydrophilic nano-structured surface with antibacterial properties 具有抗菌性能的超亲水性纳米结构表面

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-08 DOI: 10.1364/ome.505843

Sahar Sohrabi, Hedieh Pazokian, Bijan Ghafary, and Mahmood Mollabashi

引用次数: 0

Improved optical performance of CH₃NH₃PbI₃ perovskite - Germanium heterostructure photodetectors assisted by a periodic nanosphere array 周期性纳米球阵列辅助提高 CH₃NH₃PbI₃ 包晶石-锗异质结构光电探测器的光学性能

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-08 DOI: 10.1364/ome.507869

Yangxi Chen, Jing Wang, Weina Liu, Zhichao Li, Chaoling Du

引用次数: 0

Theoretical Prediction of the Effective Dynamic Dielectric Constant of Disordered Hyperuniform Anisotropic Composites Beyond the Long-Wavelength Regime 无序超均匀各向异性复合材料超越长波长区的有效动态介电常数的理论预测

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-07 DOI: 10.1364/ome.507918

Jaeuk Kim, salvatore torquato

{"title":"Theoretical Prediction of the Effective Dynamic Dielectric Constant of Disordered Hyperuniform Anisotropic Composites Beyond the Long-Wavelength Regime","authors":"Jaeuk Kim, salvatore torquato","doi":"10.1364/ome.507918","DOIUrl":"https://doi.org/10.1364/ome.507918","url":null,"abstract":"Torquato and Kim [Phys. Rev. X 11, 296 021002 (2021)] derived exact nonlocal strong-contrast expansions of the effective dynamic dielectric constant tensor that treat general three-dimensional (3D) two-phase composites, which are valid well beyond the long-wavelength regime. Here, we demonstrate that truncating this general rapidly converging series at the two- and three-point levels is a powerful theoretical tool for extracting accurate approximations suited for various microstructural symmetries. We derive such closed-form formulas applicable to transverse polarization in layered media and transverse magnetic polarization in transversely isotropic media, respectively. We use these formulas to estimate effective dielectric constant for models of 3D disordered hyperuniform layered and transversely isotropic media: nonstealthy hyperuniform and stealthy hyperuniform (SHU) media. In particular, we show that SHU media are perfectly transparent (trivially implying no Anderson localization, in principle) within finite wave number intervals through the third-order terms. For these two models, we validate that the second-order formulas, which depend on the spectral density, are already very accurate well beyond the long-wavelength regime by showing very good agreement with the finite-difference time-domain simulations. The high predictive power of the second-order formulas implies that higher-order contributions are negligibly small, and thus, it very accurately approximates multiple scattering effects. Therefore, there can be no Anderson localization in practice within the predicted perfect transparency interval in SHU media because the localization length should be very large compared to any practically large sample size. Our predictive theory provides a foundation for the inverse design of novel effective wave characteristics of disordered and statistically anisotropic structures.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"51 43","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138592935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controlling lateral thickness distributions of magnetron sputtering deposited coatings using shadow masks 利用阴影掩膜控制磁控溅射沉积涂层的横向厚度分布

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-07 DOI: 10.1364/ome.500104

Shanglin Chen, Jian Sun, Jingping Li, Kui Yi, Chenfei Wang, Jianda Shao, and Meiping Zhu

{"title":"Controlling lateral thickness distributions of magnetron sputtering deposited coatings using shadow masks","authors":"Shanglin Chen, Jian Sun, Jingping Li, Kui Yi, Chenfei Wang, Jianda Shao, and Meiping Zhu","doi":"10.1364/ome.500104","DOIUrl":"https://doi.org/10.1364/ome.500104","url":null,"abstract":"A lateral thickness distribution control model for magnetron sputter-deposited coatings was established using shadow masks. The sputtering yield distributions were investigated in detail, particularly the variation trend from straight to curved tracks, based on the erosion profiles of rectangular targets. On this basis, a mathematical model for a planetary rotation system was established to simulate the thickness distribution of coatings on different substrates, including flat, spherical, and aspherical shapes, accurately. A shadow mask with multi-Gaussian outlines was proposed, and the coating thickness was effectively controlled according to specific distribution requirements by optimizing the profile parameters of the masks using a genetic algorithm. Flat and ellipsoidal substrates were used to prepare Mo and Si monolayer coatings to verify the effectiveness of this model. Although the diameters of the substrates were close to the lengths of the rectangular targets, the results showed that uniform coatings were obtained on the flat substrate, whereas the ellipsoidal substrate exhibited high-precision gradient coatings, with maximum deviations below 0.5%, which proved the validity of this approach.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"67 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138556969","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of BaF2 and Y2O3 on the Raman scattering characteristics of fluorotellurite glasses BaF2 和 Y2O3 对氟铁榴石玻璃拉曼散射特性的影响

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2023-12-07 DOI: 10.1364/ome.506523

Qian Zhang, Yadong Jiao, Zhixu Jia, Lili Wang, Weiping Qin, and Guanshi Qin

{"title":"Effect of BaF2 and Y2O3 on the Raman scattering characteristics of fluorotellurite glasses","authors":"Qian Zhang, Yadong Jiao, Zhixu Jia, Lili Wang, Weiping Qin, and Guanshi Qin","doi":"10.1364/ome.506523","DOIUrl":"https://doi.org/10.1364/ome.506523","url":null,"abstract":"In this letter, we investigated the Raman scattering characteristics of a series of aTeO2-(90-a)BaF2-10Y2O3 (a = 85, 80, 75, 70, 65, 60, 55 mol%), bTeO2-(95-b)BaF2-5Y2O3 (b = 90, 85, 80, 75, 70, 65, 60, 55, 50 mol%) and cTeO2-(100-c)BaF2 (c = 95, 90, 85, 80, 75, 70, 65, 60 mol%) fluorotellurite glasses. With increasing the concentration of BaF2, the peak Raman gain coefficient at 785 cm−1 increased while the Raman gain bandwidth (full spectral width at half maximum of the Raman peaks around 785 cm−1) decreased, which was attributed to the increasing proportion of non-bridge oxygen bonds in the fluorotellurite glass systems. The same results were also observed for the case of the increasing of the concentration of Y2O3. In these samples, the 50TeO2-40BaF2-10Y2O3 glass has the largest Raman gain coefficient of 29.9 × 10−13 m/W, and the 95TeO2-5BaF2 glass has the widest Raman gain bandwidth of 7.35 THz for the pumping laser at 633 nm. Furthermore, the first-order Raman Stokes light peaked at ∼2373 nm was obtained by using fluorotellurite fiber based on the above glasses as Raman gain medium and a 2000nm picoseconds laser as pump light. Our results provide guidance for further improving the performance of Raman fiber lasers or amplifiers based on fluorotellurite fibers.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"20 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2023-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138545396","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0