Optics Pub Date : 2024-03-01 DOI: 10.3390/opt5010009

D. Rego, Fabrício G. S. Silva, Rodrigo C. Gusmão, Vitaly F. Rodriguez-Esquerre

{"title":"Design of Planar Multilayer Devices for Optical Filtering Using Surrogate Model Based on Artificial Neural Network","authors":"D. Rego, Fabrício G. S. Silva, Rodrigo C. Gusmão, Vitaly F. Rodriguez-Esquerre","doi":"10.3390/opt5010009","DOIUrl":"https://doi.org/10.3390/opt5010009","url":null,"abstract":"Artificial intelligence paradigms hold significant potential to advance nanophotonics. This study presents a novel approach to designing a plasmonic absorber using an artificial neural network as a surrogate model in conjunction with a genetic algorithm. The methodology involved numerical simulations of multilayered metal–dielectric plasmonic structures to establish a dataset for training an artificial neural network (ANN). The results demonstrate the proficiency of the trained ANN in predicting reflectance spectra and its ability to generalize intricate relationships between desired performance and geometric configurations, with values of correlation higher than 98% in comparison with ground-truth electromagnetic simulations. Furthermore, the ANN was employed as a surrogate model in a genetic algorithm (GA) loop to achieve target optical behaviors. The proposed methodology provides a powerful means of inverse designing multilayered metal–dielectric devices tailored for visible band wavelength filtering. This research demonstrates that the integration of AI-driven approaches in nanophotonics leads to efficient and effective design strategies.","PeriodicalId":516083,"journal":{"name":"Optics","volume":"99 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140086819","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

Surface Topological Plexcitons: Strong Coupling in a Bi2Se3 Topological Insulator Nanoparticle-Quantum Dot Molecule 表面拓扑反射子：Bi2Se3 拓扑绝缘体纳米粒子-量子点分子中的强耦合作用

Optics Pub Date : 2024-02-27 DOI: 10.3390/opt5010008

George Kountouris, V. Yannopapas

引用次数: 0

Electronic Population Reconstruction from Strong-Field-Modified Absorption Spectra with a Convolutional Neural Network 利用卷积神经网络从强场修正吸收光谱重构电子种群

Optics Pub Date : 2024-02-26 DOI: 10.3390/opt5010007

Daniel Richter, A. Magunia, M. Rebholz, Christian Ott, T. Pfeifer

引用次数: 0

Dual-Band Image Fusion Approach Using Regional Weight Analysis Combined with a Multi-Level Smoothing Filter 使用区域权重分析与多级平滑滤波器相结合的双波段图像融合方法

Optics Pub Date : 2024-02-21 DOI: 10.3390/opt5010006

Jia Yi, Huilin Jiang, Xiaoyong Wang, Yong Tan

{"title":"Dual-Band Image Fusion Approach Using Regional Weight Analysis Combined with a Multi-Level Smoothing Filter","authors":"Jia Yi, Huilin Jiang, Xiaoyong Wang, Yong Tan","doi":"10.3390/opt5010006","DOIUrl":"https://doi.org/10.3390/opt5010006","url":null,"abstract":"Image fusion is an effective and efficient way to express the feature information of an infrared image and abundant detailed information of a visible image in a single fused image. However, obtaining a fused result with good visual effect, while preserving and inheriting those characteristic details, seems a challenging problem. In this paper, by combining a multi-level smoothing filter and regional weight analysis, a dual-band image fusion approach is proposed. Firstly, a series of dual-band image layers with different details are obtained using smoothing results. With different parameters in a bilateral filter, different smoothed results are achieved at different levels. Secondly, regional weight maps are generated for each image layer, and then we fuse the dual-band image layers with their corresponding regional weight map. Finally, by imposing proper weights, those fused image layers are synthetized. Through comparison with seven excellent fusion methods, both subjective and objective evaluations for the experimental results indicate that the proposed approach can produce the best fused image, which has the best visual effect with good contrast, and those small details are preserved and highlighted, too. In particular, for the image pairs with a size of 640 × 480, the algorithm could provide a good visual effect result within 2.86 s, and the result has almost the best objective metrics.","PeriodicalId":516083,"journal":{"name":"Optics","volume":"13 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140443458","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

Introducing Optical Nonlinearity in PDMS Using Organic Solvent Swelling 利用有机溶剂膨胀在 PDMS 中引入光学非线性

Optics Pub Date : 2024-02-15 DOI: 10.3390/opt5010005

S. R. Bongu, Maximilian Buchmüller, Daniel Neumaier, Patrick Görrn

{"title":"Introducing Optical Nonlinearity in PDMS Using Organic Solvent Swelling","authors":"S. R. Bongu, Maximilian Buchmüller, Daniel Neumaier, Patrick Görrn","doi":"10.3390/opt5010005","DOIUrl":"https://doi.org/10.3390/opt5010005","url":null,"abstract":"The feasibility of introducing optical nonlinearity in poly-dimethyl siloxane (PDMS) using organic solvent swelling was investigated. The third-order nonlinear refraction and absorption properties of the individual materials, as well as the PDMS/solvent compounds after swelling were characterized. The well-established Z-scan technique served as characterization method for the nonlinear properties under picosecond pulsed laser excitation at a 532 nm wavelength. These experiments included investigations on the organic solvents nitrobenzene, 2,6-lutidine, and toluene, which showed inherent optical nonlinearity. We showed that nitrobenzene, one of the most well-known nonlinear optical materials, has proven suboptimal in this context due to its limited swelling effect in PDMS and comparatively high (non)linear absorption, resulting in undesirable thermal effects and potential photo-induced damage in the composite material. Toluene and 2,6-lutidine not only exhibited lower absorption compared to nitrobenzene but also show a more pronounced swelling effect in PDMS. The incorporation of toluene caused a weight change of up to 116% of PDMS, resulting in substantial nonlinear optical effects, reflected in the nonlinear refractive index of the PDMS/toluene composite n2=3.1×10−15 cm2/W.","PeriodicalId":516083,"journal":{"name":"Optics","volume":"378 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139833858","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

Introducing Optical Nonlinearity in PDMS Using Organic Solvent Swelling 利用有机溶剂膨胀在 PDMS 中引入光学非线性

Optics Pub Date : 2024-02-15 DOI: 10.3390/opt5010005

S. R. Bongu, Maximilian Buchmüller, Daniel Neumaier, Patrick Görrn

{"title":"Introducing Optical Nonlinearity in PDMS Using Organic Solvent Swelling","authors":"S. R. Bongu, Maximilian Buchmüller, Daniel Neumaier, Patrick Görrn","doi":"10.3390/opt5010005","DOIUrl":"https://doi.org/10.3390/opt5010005","url":null,"abstract":"The feasibility of introducing optical nonlinearity in poly-dimethyl siloxane (PDMS) using organic solvent swelling was investigated. The third-order nonlinear refraction and absorption properties of the individual materials, as well as the PDMS/solvent compounds after swelling were characterized. The well-established Z-scan technique served as characterization method for the nonlinear properties under picosecond pulsed laser excitation at a 532 nm wavelength. These experiments included investigations on the organic solvents nitrobenzene, 2,6-lutidine, and toluene, which showed inherent optical nonlinearity. We showed that nitrobenzene, one of the most well-known nonlinear optical materials, has proven suboptimal in this context due to its limited swelling effect in PDMS and comparatively high (non)linear absorption, resulting in undesirable thermal effects and potential photo-induced damage in the composite material. Toluene and 2,6-lutidine not only exhibited lower absorption compared to nitrobenzene but also show a more pronounced swelling effect in PDMS. The incorporation of toluene caused a weight change of up to 116% of PDMS, resulting in substantial nonlinear optical effects, reflected in the nonlinear refractive index of the PDMS/toluene composite n2=3.1×10−15 cm2/W.","PeriodicalId":516083,"journal":{"name":"Optics","volume":"4 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139774249","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

Simple Estimate of the Impact of M2 and Strehl Ratio on the Effective Focusable Spot Size 简单估算 M2 和 Strehl 比对有效可聚焦光斑尺寸的影响

Optics Pub Date : 2024-01-29 DOI: 10.3390/opt5010004

S. Arba-Mosquera, Pascal Naubereit, Simas Sobutas

引用次数: 0

An Anti-Noise-Designed Residual Phase Unwrapping Neural Network for Digital Speckle Pattern Interferometry 用于数字斑点模式干涉测量的反噪声设计残差相位解包神经网络

Optics Pub Date : 2024-01-19 DOI: 10.3390/opt5010003

Biao Wang, Xiaoling Cao, Meiling Lan, Chang Wu, Yonghong Wang

引用次数: 0

Degree of Polarization of Cathodoluminescence from a (100) GaAs Substrate with SiN Stripes 带有氮化硅条纹的 (100) GaAs 衬底发出的阴极荧光的极化程度

Optics Pub Date : 2024-01-17 DOI: 10.3390/opt5010002

Daniel T. Cassidy, Philippe Pagnod-Rossiaux, Merwan Mokhtari

引用次数: 0

Hybrid Approach for Multiscale and Multimodal Time-Resolved Diagnosis of Ultrafast Processes in Materials via Tailored Synchronization of Laser and X-ray Sources at MHz Repetition Rates 通过以 MHz 重复率对激光和 X 射线源进行定制同步，实现材料中超快过程的多尺度和多模态时间分辨诊断的混合方法

Optics Pub Date : 2024-01-16 DOI: 10.3390/opt5010001

Nikita Marchenkov, E. Mareev, Anton Kulikov, Fedor Pilyak, Eduard Ibragimov, Yuri Pisarevskii, Fedor Potemkin

{"title":"Hybrid Approach for Multiscale and Multimodal Time-Resolved Diagnosis of Ultrafast Processes in Materials via Tailored Synchronization of Laser and X-ray Sources at MHz Repetition Rates","authors":"Nikita Marchenkov, E. Mareev, Anton Kulikov, Fedor Pilyak, Eduard Ibragimov, Yuri Pisarevskii, Fedor Potemkin","doi":"10.3390/opt5010001","DOIUrl":"https://doi.org/10.3390/opt5010001","url":null,"abstract":"The synchronization of laser and X-ray sources is essential for time-resolved measurements in the study of ultrafast processes, including photo-induced piezo-effects, shock wave generation, and phase transitions. On the one hand, optical diagnostics (by synchronization of two laser sources) provides information about changes in vibration frequencies, shock wave dynamics, and linear and nonlinear refractive index behavior. On the other hand, optical pump–X-ray probe diagnostics provide an opportunity to directly reveal lattice dynamics. To integrate two approaches into a unified whole, one needs to create a robust method for the synchronization of two systems with different repetition rates up to the MHz range. In this paper, we propose a universal approach utilizing a field-programmable gate array (FPGA) to achieve precise synchronization between different MHz sources such as various lasers and synchrotron X-ray sources. This synchronization method offers numerous advantages, such as high flexibility, fast response, and low jitter. Experimental results demonstrate the successful synchronization of two different MHz systems with a temporal resolution of 250 ps. This enables ultrafast measurements with a sub-nanosecond resolution, facilitating the uncovering of complex dynamics in ultrafast processes.","PeriodicalId":516083,"journal":{"name":"Optics","volume":" 71","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139619270","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

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