Infrared Physics & Technology最新文献_第10页

High mechanical stability MEMS-based cantilever tunable FP filter for cooled infrared spectral detector 用于制冷红外光谱探测器的高机械稳定性mems悬臂可调FP滤波器

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-24 DOI: 10.1016/j.infrared.2025.105793

Xiangxiao Ying , Yi Zhou , Yan Gao , Jian Zhou , Min Huang , Fangfang Wang , Lingfang Wang , Yunmeng Liu , Jianxin Chen

{"title":"High mechanical stability MEMS-based cantilever tunable FP filter for cooled infrared spectral detector","authors":"Xiangxiao Ying , Yi Zhou , Yan Gao , Jian Zhou , Min Huang , Fangfang Wang , Lingfang Wang , Yunmeng Liu , Jianxin Chen","doi":"10.1016/j.infrared.2025.105793","DOIUrl":"10.1016/j.infrared.2025.105793","url":null,"abstract":"<div><div>Spectral integrated detection is one of important branch anticipated for the next generation infrared FPA, which includes so-called multi-dimensional detection capabilities with function diversity. Such enhancement of the current state-of-the-art FPA technologies allow real-time tuning of spectral information to be gathered from multiple narrow wavelength bands, getting data-cube to meet the requirements of clear target recognition in complex noisy scenarios. In order to provide a reduced size, weight and power (SWaP) solution, microelectromechanical systems (MEMS) based electrically tunable filter technology has been developed. This adopted approach is capable of delivering on-chip spectral detector by obtaining narrow-band spectral sensitivity utilizing tunable MEMS optical filter directly integrated on FPA chips. Especially for integration with cooled infrared FPA, it is necessary to meet the reliability and stability challenges of large-sized filters matching FPA chip area under low-temperature vacuum environment. In this paper, a multi physics field coupling analysis work was also dug out for understanding the stability performance of electromechanical characteristics. Then we produced MEMS based tunable FP filters, which demonstrated a transmission of 45 % with a well uniformity within the filter area of 3 mm radius, and maximum tuning wavelength range of 0.7 μm (from 5.3 to 4.6 μm) under voltage bias. We integrated the tuning filter with InAs/GaSb Type-II superlattice infrared detector and tested the performance of tunable photo-responsivity at liquid nitrogen temperature. All the work laid the foundation for integration with cooled FPA in our next step work.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105793"},"PeriodicalIF":3.1,"publicationDate":"2025-02-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143521313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dark current suppression of very long-wavelength p-on-n HgCdTe infrared detectors via optimizing absorber layer carrier concentration 通过优化吸收层载流子浓度抑制超长波长 p 对 n HgCdTe 红外探测器的暗电流

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-21 DOI: 10.1016/j.infrared.2025.105769

Xun Li, Xi Wang, Xiaohui Xie, Quanzhi Sun, Songmin Zhou, Zhikai Gan, Liqi Zhu, Yanfeng Wei, Chun Lin

{"title":"Dark current suppression of very long-wavelength p-on-n HgCdTe infrared detectors via optimizing absorber layer carrier concentration","authors":"Xun Li, Xi Wang, Xiaohui Xie, Quanzhi Sun, Songmin Zhou, Zhikai Gan, Liqi Zhu, Yanfeng Wei, Chun Lin","doi":"10.1016/j.infrared.2025.105769","DOIUrl":"10.1016/j.infrared.2025.105769","url":null,"abstract":"<div><div>In this study, the very long-wavelength (VLW) p-on-n HgCdTe devices with different absorber layer carrier concentration are fabricated and their dark current density versus voltage (J-V) characteristics are analyzed. The results show that suppression tunneling current is of great significance for VLW device, and reducing absorber layer carrier concentration is an feasible method. The influences of carrier concentration on dark current density are discussed further, considering the dependence of minority carrier lifetime on carrier concentration. It is found that the tunneling current and generation-recombination current are the dominant dark current mechanism respectively when the absorber layer carrier concentration is above and below 1.0 × 10<sup>15</sup> cm<sup>−3</sup>. The experiment and simulation results indicate that the n-type absorber layer with carrier concentration below 1.0 × 10<sup>15</sup> cm<sup>−3</sup> and high Shockley-Read-Hall (SRH) lifetime is beneficial for the preparation of low dark current VLW p-on-n HgCdTe devices.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105769"},"PeriodicalIF":3.1,"publicationDate":"2025-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488330","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Spectral-Spatial hyperspectral image classification based on hybrid of archimedes optimization algorithm and genetic algorithm with bitonic filter 基于阿基米德优化算法和遗传算法与比顿滤波器混合算法的光谱-空间高光谱图像分类法

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-20 DOI: 10.1016/j.infrared.2025.105788

Mohammed Abdulmajeed Moharram, Divya Meena Sundaram

{"title":"Spectral-Spatial hyperspectral image classification based on hybrid of archimedes optimization algorithm and genetic algorithm with bitonic filter","authors":"Mohammed Abdulmajeed Moharram, Divya Meena Sundaram","doi":"10.1016/j.infrared.2025.105788","DOIUrl":"10.1016/j.infrared.2025.105788","url":null,"abstract":"<div><div>Hyperspectral imaging (HSI) is widely utilized for its ability to capture detailed spectral information about objects’ physical and chemical properties. However, the high dimensionality of HSI data introduces challenges, including redundant, noisy, and highly correlated spectral bands, which can degrade classification performance. Effective feature selection is essential to mitigate these issues and address the Hughes phenomenon by retaining only the most informative bands. Metaheuristic optimization techniques have been widely applied for band selection, but they often face limitations such as premature convergence and local optima entrapment. To overcome these challenges, this study proposes a hybrid optimization method, AOA-GA, which integrates the Archimedes Optimization Algorithm (AOA) with the Genetic Algorithm (GA). This hybrid approach achieves a superior exploration–exploitation balance, enabling efficient global optimization and reducing the risk of local optima. Additionally, spatial features are incorporated during classification using the Bitonic Filter, enhancing overall accuracy. The proposed method is evaluated using two classifiers, Random Forest and Support Vector Machine, on three benchmark hyperspectral datasets: Indian Pines, Pavia University, and Salinas. Experimental results demonstrate that AOA-GA significantly outperforms state-of-the-art methods, showcasing its robustness, efficiency, and superior classification performance across diverse HSI datasets.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105788"},"PeriodicalIF":3.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488329","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Study on area-dependent multiplication region width and optimization of HgCdTe avalanche focal plane HgCdTe雪崩焦平面面积倍增区宽度及优化研究

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-20 DOI: 10.1016/j.infrared.2025.105781

Hao Xie , Hui Li , Liao Yang , Huijun Guo , Chuan Shen , Qinghua Liang , Yi Zhou , Lu Chen , Li He

{"title":"Study on area-dependent multiplication region width and optimization of HgCdTe avalanche focal plane","authors":"Hao Xie , Hui Li , Liao Yang , Huijun Guo , Chuan Shen , Qinghua Liang , Yi Zhou , Lu Chen , Li He","doi":"10.1016/j.infrared.2025.105781","DOIUrl":"10.1016/j.infrared.2025.105781","url":null,"abstract":"<div><div>Linear-mode HgCdTe avalanche photodiodes (APDs) have attracted significant attention due to their exceptionally low excess noise, operational bias ranging from −12 to 0 V, and linearly tunable gain. These characteristics suggest promising future applications in optical observations. The design of the multiplication region based on the PIN structure is critical, as it directly influences the photoelectric properties of the device, including gain and excess noise. This paper primarily investigates the effect of implanted areas on the multiplication region and examines area-related gain and noise characteristics of mid-wavelength infrared (MWIR) HgCdTe APDs at a temperature of 80 K. Studies conducted on diodes with varying implanted areas indicate that those with larger implanted areas create a wider multiplication region, which leads to lower gain and higher excess noise factors. Finally, 30 μm pitch 640 × 512 array HgCdTe APDs for cut-off wavelengths 4.8 µm at 80 K corresponding to compositions x<sub>Cd</sub> = 0.31 were fabricated. The number of noise bad pixels and the band-to-band tunneling (BBT) current have been significantly reduced due to the optimized the multiplication region width. Consequently, high-definition imaging under short integration times has been successfully achieved.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105781"},"PeriodicalIF":3.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143474369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

CrBi2Te4-based mode-locked fiber laser with three switchable operating states 基于crbi2te4的三种可切换工作状态的锁模光纤激光器

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-20 DOI: 10.1016/j.infrared.2025.105724

Chengda Ge , Yong Yao , Yu Yang , Linguang Guo , Songting Li , Haoxue Qiu , Chonghao Wu , Tianliang Liu , Jianan Duan , Xiaochuan Xu , Jiajun Tian

{"title":"CrBi2Te4-based mode-locked fiber laser with three switchable operating states","authors":"Chengda Ge , Yong Yao , Yu Yang , Linguang Guo , Songting Li , Haoxue Qiu , Chonghao Wu , Tianliang Liu , Jianan Duan , Xiaochuan Xu , Jiajun Tian","doi":"10.1016/j.infrared.2025.105724","DOIUrl":"10.1016/j.infrared.2025.105724","url":null,"abstract":"<div><div>In recent years, 2D materials have been widely used in the field of optoelectronics, and these 2D materials have further improved the performance of fiber lasers. CrBi<sub>2</sub>Te<sub>4</sub> is a member of the 2D material family known as topological insulators, featuring unique ferromagnetic properties and potential for saturation absorption. In this paper, we study the saturation absorption characteristics of CrBi<sub>2</sub>Te<sub>4</sub>-PVA nanosheets and CrBi<sub>2</sub>Te<sub>4</sub> D-type fibers, and verify their nonlinear absorption characteristics in erbium-doped fiber lasers. When CrBi<sub>2</sub>Te<sub>4</sub>-PVA nanosheets are used as SAs, 10th-order harmonic pulses with a pulse width of 765.1 fs are generated. Utilizing CrBi<sub>2</sub>Te<sub>4</sub> D-type fibers as saturable absorbers (SAs) leads to the generation of dark solitons and bright-dark soliton pairs, with average output powers reaching a maximum of 2.38 mW and 3.12 mW, respectively. To the best of our knowledge, this is the first presentation of a mode-locked fiber laser with the CrBi<sub>2</sub>Te<sub>4</sub>-based SA, and also the first study of bright and dark soliton properties of a CrBi<sub>2</sub>Te<sub>4</sub>-based fiber laser. It is foreseeable that CrBi<sub>2</sub>Te<sub>4</sub> will become an appealing candidate for bright and dark soliton fiber lasers.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105724"},"PeriodicalIF":3.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Natural statistics of multisensor images: Comparative analysis and application to image classification and image fusion 多传感器图像的自然统计：比较分析及其在图像分类和融合中的应用

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-20 DOI: 10.1016/j.infrared.2025.105780

Mohammed Zouaoui Laidouni, Boban Bondžulić, Dimitrije Bujaković, Touati Adli, Milenko Andrić

{"title":"Natural statistics of multisensor images: Comparative analysis and application to image classification and image fusion","authors":"Mohammed Zouaoui Laidouni, Boban Bondžulić, Dimitrije Bujaković, Touati Adli, Milenko Andrić","doi":"10.1016/j.infrared.2025.105780","DOIUrl":"10.1016/j.infrared.2025.105780","url":null,"abstract":"<div><div>This paper presents a comparative analysis of multisensor images, including long-wave infrared (LWIR), near-infrared (NIR), and visible light (VIS) images, using natural scene statistics (NSS) models with a focus on image classification and optimizing multisensor image fusion. The study considers the impact of several factors, such as flat region, light condition and noise power, on four coefficients, namely, mean subtracted contrast normalized (MSCN), paired product, log-derivative, and steerable pyramid. It reveals remarkable patterns in the NSS of LWIR, NIR, and VIS images, showcasing both similarities and differences. Notably, NIR and VIS images exhibit a high statistical similarity, while LWIR displays a decorrelated pattern compared to them. Additionally, two practical tasks are addressed: image classification and multisensor image fusion. The obtained results demonstrate that the NSS of LWIR, NIR, and VIS images can firstly be used to build image distortion classifiers for multisensor images. Secondly, they can be used in multisensor image fusion to select the optimal combination of images that maximize the texture information in the fused image. These findings offer valuable insights for improving sensor selection and image fusion quality assessment.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105780"},"PeriodicalIF":3.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143488328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

PIFRNet: A progressive infrared feature-refinement network for single infrared image super-resolution PIFRNet：一种用于单幅超分辨率红外图像的渐进式红外特征细化网络

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-20 DOI: 10.1016/j.infrared.2025.105779

Si Guo , Shi Yi , Mengting Chen , Yuanlu Zhang

{"title":"PIFRNet: A progressive infrared feature-refinement network for single infrared image super-resolution","authors":"Si Guo , Shi Yi , Mengting Chen , Yuanlu Zhang","doi":"10.1016/j.infrared.2025.105779","DOIUrl":"10.1016/j.infrared.2025.105779","url":null,"abstract":"<div><div>Infrared (IR) image super-resolution is essential to enrich the spatial information of low-resolution IR images for facilitating computer vision tasks in low-illumination environments. However, IR images lack the textural details and colour information. Hence, existing super-resolution methods for visible images generally yield unsatisfactory super-resolution performance for IR images. Moreover, most super-resolution methods tailored for IR images neglect their intrinsic characteristics, thereby limiting their performance. Thus, this study proposes a progressive IR feature-refinement network for single IR image super-resolution (PIFRNet). First, a sequence of cascade IR feature-refinement blocks is designed in the deep feature-extraction path to extract and refine the deep features of IR images progressively. Subsequently, hybrid CNN–Transformer modules are developed to further enhance the long-range dependency attention of the extracted features. Then, a bespoke feature-fusion strategy with down connections, skip connections, and efficient feature-fusion blocks is implemented to effectively integrate low- to high-level IR image deep features. Finally, a dedicated large-scale super-resolution dataset of IR images is constructed for training and testing the IR image super-resolution networks. Extensive ablation studies and comparative experiments are conducted on this dataset. The ablation study results verify that the components and strategies designed for the proposed network are suitable for IR image super-resolution. The comparative experimental results demonstrate the superiority of the proposed network over other state-of-the-art visible/IR image super-resolution networks. Furthermore, a robustness test and an object-detection experiment are performed to prove the adaptability of the proposed network to various types of IR images and the significant object detection accuracy improvement achieved using the proposed PIFRNet.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105779"},"PeriodicalIF":3.1,"publicationDate":"2025-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Based on BP/CuInP2S6 van der Waals heterojunction terahertz photodetectors with High-performance photoresponse 基于BP/CuInP2S6的高性能范德华异质结太赫兹光电探测器

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-19 DOI: 10.1016/j.infrared.2025.105774

Xin Sun , Zhen Hu , Kaixuan Zhang , Xiaokai Pan , Yingdong Wei , Shiqi Lan , Yiming Wang , Yichong Zhang , Xiaoshaung Chen , Lin Wang

{"title":"Based on BP/CuInP2S6 van der Waals heterojunction terahertz photodetectors with High-performance photoresponse","authors":"Xin Sun , Zhen Hu , Kaixuan Zhang , Xiaokai Pan , Yingdong Wei , Shiqi Lan , Yiming Wang , Yichong Zhang , Xiaoshaung Chen , Lin Wang","doi":"10.1016/j.infrared.2025.105774","DOIUrl":"10.1016/j.infrared.2025.105774","url":null,"abstract":"<div><div>The development of solid-state, integrable, and highly sensitive terahertz photodetectors plays a pivotal role in propelling the progress of terahertz technology. However, the progress of conventional semiconductor photodetectors has been hindered by factors such as material bandgap, low-temperature cooling, and optical absorption efficiency. In view of the distinctive structure and physical properties of two-dimensional (2D) materials, especially the vertical stacking without lattice mismatch and the compatibility with silicon-based optoelectronic technology, which provides a broader opportunity for nano optoelectronics. In recent years, the combination of ferroelectric localized electromagnetic field with 2D materials has opened up new avenues for designing novel optoelectronic devices, significantly augmenting detector sensitivity and expanding their wavelength response range. In this context, this paper proposes a ferroelectric field-effect transistor by integrating black phosphorus (BP) with CuInP<sub>2</sub>S<sub>6</sub> (CIPS) van der Waals heterostructures and incorporating a four-leaf clover artificial microstructure to achieve high-sensitivity detection and imaging in the terahertz range. By applying gate bias to manipulate the ferroelectric polarization of the CIPS dielectric layer, the ferroelectric field-effect transistor demonstrates an exceptional voltage responsivity (374.6 V/W), extremely low noise equivalent power (0.64 nW/Hz<sup>0.5</sup>), and a response time of 9.5 μs. The research results further expand the application range of 2D ferroelectric materials in the terahertz domain.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105774"},"PeriodicalIF":3.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143463353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Infrared radiation characteristics and statistical damage model for failure of water-bearing sandstone 含水砂岩破坏的红外辐射特征及统计损伤模型

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-19 DOI: 10.1016/j.infrared.2025.105778

Longfei Chang , Mingyuan Zhang , Lu Chen , Ruixue Du , Shilin Li , Yingjun Li

{"title":"Infrared radiation characteristics and statistical damage model for failure of water-bearing sandstone","authors":"Longfei Chang , Mingyuan Zhang , Lu Chen , Ruixue Du , Shilin Li , Yingjun Li","doi":"10.1016/j.infrared.2025.105778","DOIUrl":"10.1016/j.infrared.2025.105778","url":null,"abstract":"<div><div>The presence of water significantly decreases the strength of sandstone. This highlights the need for accurate and effective monitoring and prediction of the instability and failure of water-bearing rock formations. In this work, sandstones with different water contents were subjected to infrared radiation (IR) under uniaxial loading. The mechanical and IR characteristics during the failure process of dry and water-bearing sandstones were examined. The results show a negative correlation between the uniaxial compressive strength, elastic modulus, and water content of the rock. The innovative introduction of a new index, the Jaccard distance (<em>d<sub>J</sub></em>), as a pre-warning indicator for rock instability failure. The rate of increase in <em>d<sub>J</sub></em> for water-bearing rock is significantly greater than that for dry rock during the compaction stage. Rocks with various water contents exhibited a brief steady stage in <em>d<sub>J</sub></em> before a sudden increase prior to reaching the peak stress, corresponding to the complete failure of the rock. In terms of fracture patterns, dry rock primarily exhibited tensile failure, whereas the failure mode of water-bearing rock shifted to combined tensile-shear composite failure. Furthermore, a segmented constitutive model based on IR for rock uniaxial loading was established, incorporating modifications for water content. This model enables the calculation of stress variations through monitoring the infrared temperature field. The resulting model shows a high degree of agreement with the experimental results, significantly outperforming the unmodified model. These findings provide a valuable reference for IR-based monitoring of the engineering stability of water-bearing rock masses.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105778"},"PeriodicalIF":3.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143471278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Using a one-dimensional convolutional neural network on FTIR spectroscopy to measure the thickness of composite plastic films 利用傅里叶红外光谱的一维卷积神经网络测量复合塑料薄膜的厚度

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-02-19 DOI: 10.1016/j.infrared.2025.105777

Xiaodong Wang, Liwei Ni, Cheng Zhang, Qiyue Xu, Shuliang Ye

{"title":"Using a one-dimensional convolutional neural network on FTIR spectroscopy to measure the thickness of composite plastic films","authors":"Xiaodong Wang, Liwei Ni, Cheng Zhang, Qiyue Xu, Shuliang Ye","doi":"10.1016/j.infrared.2025.105777","DOIUrl":"10.1016/j.infrared.2025.105777","url":null,"abstract":"<div><div>Multilayer composite films have gained widespread application across a variety of industries and applications due to their unique properties and functionalities. The precise control of the thickness of each layer ensures that every layer contributes optimally to the desired attributes. In this study, a method using a one-dimensional convolutional neural network (1D-CNN) was developed to analyze the spectral data, five kinds of plastic films were assembled with different thickness combinations and measured with FTIR, which provided the data sets for 1D-CNN modeling. Compared to partial least squares (PLS) and fully connected neural network (FCNN) models, the 1D-CNN model performs better in accuracy of the thickness prediction, with respective root mean square error (<span><math><mrow><mi>RMSE</mi></mrow></math></span>) values dropping from < 9.11 μm to < 0.31 μm for film thickness of 13–270 μm. The developed regression model was visualized using the gradient weighted class activation mapping (Grad-CAM) method for detailed analysis and selection of significant wavenumbers in order to build a more compact 1D-CNN model. Altogether, these results show that the proposed spectral 1D-CNN technique can measure the thickness of components in composite plastic films rapidly and accurately, and has the potential to improve efficiency and reduce the cost of instruments and calculations for spectral quantitation applications.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"147 ","pages":"Article 105777"},"PeriodicalIF":3.1,"publicationDate":"2025-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143509902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0