Optical Materials Express最新文献_第5页

Aperiodicity is more effective than disorder in localizing electromagnetic waves [Invited] 在电磁波定位方面，非周期性比无序性更有效 [特邀]

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-29 DOI: 10.1364/ome.514886

Luis A. Razo-López, Geoffroy J. Aubry, Felipe A. Pinheiro, and Fabrice Mortessagne

引用次数: 0

Multiple scattering theory in one dimensional space and time dependent disorder: average field [Invited] 一维空间中的多重散射理论与时间相关无序：平均场 [特邀]

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-29 DOI: 10.1364/ome.517488

Alexandre Selvestrel, Julia Rocha, Rémi Carminati, and Romain Pierrat

引用次数: 0

Silicon integrated Bi2TbFe5O12 thin films for O-band nonreciprocal photonic device applications 用于 O 波段非互惠光子器件应用的硅集成 Bi2TbFe5O12 薄膜

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-26 DOI: 10.1364/ome.519523

Tianchi Zhang, Yucong Yang, Di Wu, Junxian Wang, Zixuan Wei, Wei Yan, and Lei Bi

引用次数: 0

Structural, chemical, and optical design optimization of an Fe2+-doped chalcogenide fiber for mid-infrared lasing 优化用于中红外激光的掺 Fe2+ 氯化物光纤的结构、化学和光学设计

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-15 DOI: 10.1364/ome.511066

Shubham Dawda, Aristide Dogariu, and Kenneth L. Schepler

引用次数: 0

High-sensitivity tapered fiber relative humidity sensor based on PDMS and GO films 基于 PDMS 和 GO 薄膜的高灵敏度锥形光纤相对湿度传感器

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-12 DOI: 10.1364/ome.519037

Heer Yang, Yuanjun Li, Cai Sun, Xuepeng Pan, Shanren Liu, Bo Wang, Mengmeng Gao, Qi Guo, and Yongsen Yu

{"title":"High-sensitivity tapered fiber relative humidity sensor based on PDMS and GO films","authors":"Heer Yang, Yuanjun Li, Cai Sun, Xuepeng Pan, Shanren Liu, Bo Wang, Mengmeng Gao, Qi Guo, and Yongsen Yu","doi":"10.1364/ome.519037","DOIUrl":"https://doi.org/10.1364/ome.519037","url":null,"abstract":"A new tapered fiber relative humidity (RH) sensor based on polydimethylsiloxane (PDMS) and graphene oxide (GO) film coatings is proposed and demonstrated. Tapered fiber is fabricated in single mode fiber by the tapering machine. The PDMS film is coated on the surface of the fiber using the hydroxide flame sintering technique, while the GO film is deposited using the physical deposition technique. This structure can achieve strong interference effect by the smaller range of tapering process. In the RH measurement experiment, the humidity sensitivity of the sensor is measured to be as high as 0.371 dB/%RH within the RH range of 35% to 90%. The experiment investigates the impact of different numbers of PDMS coating on sensitivity. As the number of PDMS coatings increases, the RH sensitivity of the sensor also increases and reaches the highest sensitivity when coated with 10 layers of PDMS film. The sensor has high sensitivity to RH, good stability and mechanical strength, which also shows great performance in both moisture absorption and desorption. These advantages make the sensor suitable for the wide range of humidity sensing applications.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"28 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139768598","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

Generalized quantum geometric tensor in a non-Hermitian exciton-polariton system [Invited] 非赫米提激子-极化子系统中的广义量子几何张量 [特邀]

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-12 DOI: 10.1364/ome.497010

Y.-M. Robin Hu, Elena A. Ostrovskaya, and Eliezer Estrecho

引用次数: 0

Band structure reconfiguration and surface Faraday rotation in Bi-substituted iron garnets 双取代铁石榴石中的带状结构重构和表面法拉第旋转

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-12 DOI: 10.1364/ome.516148

Sushree S. Dash, Gregory Odegard, and Miguel Levy

{"title":"Band structure reconfiguration and surface Faraday rotation in Bi-substituted iron garnets","authors":"Sushree S. Dash, Gregory Odegard, and Miguel Levy","doi":"10.1364/ome.516148","DOIUrl":"https://doi.org/10.1364/ome.516148","url":null,"abstract":"Bismuth-substituted lutetium iron garnets have exhibited a remarkable enhancement in Faraday rotation (FR) for films thinner than 50 nm. A sevenfold amplification in the magneto-optic gyrotropy was found to occur within 2 nm of the air-surface interface at 532 nm wavelength. The present study delves into the underlying physical mechanisms contributing to such amplification. Near-surface changes in band structure in these materials and their connection to the magneto-optic response are explored. Density functional theory is employed to investigate the changes in density of states and overall band structure reconfiguration of surface atoms. The transition dipole matrix (TDM) model is then applied to both bulk and surface states, correctly predicting a Faraday rotation enhancement at the surface as a result of overall surface band structure reconfiguration and resulting bandgap reduction. Surface versus bulk FR spectral response is extended beyond prior studies over the full visible and the near-infrared spectral ranges, predicting significant amplification across the telecom band. Experimental analysis through X-ray photoelectron spectroscopy (XPS) and UV-Vis spectroscopy reveal a reduction in bandgap as films are thinned down from 200 nm to 40 nm. By providing a deeper physical understanding of the origin of enhanced Faraday rotation at the surface, this work opens up avenues for more efficient miniaturized Faraday rotation applications. Knowledge of the band structure information thus uncovered may be used to demonstrate novel and more advanced applications.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"48 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139768488","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

Numerical simulation of split ring resonator near-fields and antiferromagnetic magnon hybridization 分环谐振器近场和反铁磁磁子杂化的数值模拟

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-12 DOI: 10.1364/ome.510831

Daniel M. Heligman, Alex M. Potts, and R. Valdés Aguilar

引用次数: 0

Iterative technique for computing soliton solutions to periodic nonlinear electrical networks 计算周期性非线性电气网络孤子解的迭代技术

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-08 DOI: 10.1364/ome.510843

Joel Johnson and Cody Scarborough

{"title":"Iterative technique for computing soliton solutions to periodic nonlinear electrical networks","authors":"Joel Johnson and Cody Scarborough","doi":"10.1364/ome.510843","DOIUrl":"https://doi.org/10.1364/ome.510843","url":null,"abstract":"Solitary waves (solitons) are fundamental modes supported by nonlinear guiding structures and propagate without any distortion due to dispersion. They can be used in the synthesis of waveforms with desired spectral or time-domain characteristics. However, the nonlinearity inherent to solitons complicates their analysis on general guiding structures. This paper proposes an iterative algorithm that can compute soliton solutions supported by general periodic electrical networks loaded by nonlinear capacitors. The proposed technique accounts for the exact dispersion of the structure and allows the capacitance to take on an arbitrary function of voltage. The algorithm computes the solution throughout the entire structure while only modeling a single unit cell, thus reducing the computational cost significantly. It is implemented within an in-house solver and verified against a commercially available circuit simulator. Different circuits which include lumped inductors, ideal transmission lines, and co-planar waveguides are simulated and shown to agree with commercial harmonic balance solvers. The presented technique will allow microwave and optical engineers to design and optimize a wide variety of nonlinear guiding structures efficiently.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"7 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140009013","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

Study of the free carrier characteristics and surface morphology of AlGaAs/GaAs thin films deposited using MOCVD 利用 MOCVD 沉积的 AlGaAs/GaAs 薄膜的自由载流子特性和表面形貌研究

IF 2.8 3区材料科学

Optical Materials Express Pub Date : 2024-02-07 DOI: 10.1364/ome.515432

Wei Liu, Xiaochuan Ji, Jianglin Dai, Jinlong Zhang, Hongfei Jiao, Xinbin Cheng, and Zhanshan Wang

{"title":"Study of the free carrier characteristics and surface morphology of AlGaAs/GaAs thin films deposited using MOCVD","authors":"Wei Liu, Xiaochuan Ji, Jianglin Dai, Jinlong Zhang, Hongfei Jiao, Xinbin Cheng, and Zhanshan Wang","doi":"10.1364/ome.515432","DOIUrl":"https://doi.org/10.1364/ome.515432","url":null,"abstract":"Ultra-low loss optical thin films find broad applications in fields such as vertical-cavity surface-emitting lasers and optical atomic clocks. The main optical losses in AlGaAs/GaAs distributed Bragg reflectors (DBRs) prepared using metal-organic chemical vapor deposition (MOCVD) arise from absorption loss caused by free carriers within the layers and scattering loss caused by surface roughness. In this study, we fabricated AlGaAs and GaAs single-layer thin films with varying Al compositions on substrates of three crystal orientations and under different V/III ratios. The dependence of carrier concentration and surface morphology on different substrates and growth conditions was investigated. Thin films grown on substrates with three different crystal orientations exhibited three distinct growth modes (step-flow mode, SK mode, and FM mode). The impact of the V/III ratio on the growth mode was found to be complex. Higher V/III ratios resulted in poorer morphology for films grown on (100) substrates, while better morphology was observed on (211) B substrates. Furthermore, the surface morphology of films grown on (100) 15° off substrates showed less sensitivity to changes in the V/III ratio. With increasing Al composition, the carrier concentration of the films significantly increased. Elevating the V/III ratio proved effective in suppressing the incorporation of carbon, thereby reducing the carrier concentration of AlGaAs films. GaAs films exhibited a low carrier concentration at an appropriate V/III ratio. Additionally, the distinct abilities of different substrates to adsorb impurities exerted a significant impact on the carrier concentration of the films. This study demonstrates that, under optimal conditions, it is feasible to fabricate AlGaAs/GaAs Bragg mirrors with low carrier concentration and relatively small roughness on (100) 15° off substrates.","PeriodicalId":19548,"journal":{"name":"Optical Materials Express","volume":"217 1","pages":""},"PeriodicalIF":2.8,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139769066","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