Infrared Physics & Technology最新文献_第4页

Composite structure of Ge/ZnO multilayer films with Au metasurface for enhanced infrared reflection and compatible microwave transparency 具有Au超表面的Ge/ZnO多层膜的复合结构增强红外反射和兼容微波透明度

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-05-06 DOI: 10.1016/j.infrared.2025.105901

Xiaofeng Qi, Mengke Qiao, Pingan Chen, Yingli Zhu, Xiangcheng Li

{"title":"Composite structure of Ge/ZnO multilayer films with Au metasurface for enhanced infrared reflection and compatible microwave transparency","authors":"Xiaofeng Qi, Mengke Qiao, Pingan Chen, Yingli Zhu, Xiangcheng Li","doi":"10.1016/j.infrared.2025.105901","DOIUrl":"10.1016/j.infrared.2025.105901","url":null,"abstract":"<div><div>Suppressing target infrared radiation signatures and enhancing their environment-adaptive camouflage capability have remained key research objectives in infrared thermal management technologies, this study proposes a metasurface-based composite multilayer film (CMF) composed of germanium (Ge)/zinc oxide (ZnO) multilayers (MLF) and an Au square periodic array (ASPA), achieving high infrared reflectivity and high microwave transmittance through synergistic design. For the infrared band, alternating Ge/ZnO layers with optimized thicknesses satisfy Bragg reflection conditions, leveraging constructive interference between high/low refractive index materials to achieve broadband high reflectivity. The ultrathin Au periodic array acts as an auxiliary reflector, suppressing transmission losses via the intrinsic infrared reflectivity of metals and dense subwavelength arrangement, thereby broadening the reflection bandwidth. For the microwave band, specially designed ultrathin Au metasurfaces achieve impedance matching with free space, demonstrating high-efficiency microwave transmission. Experimental and simulation results demonstrate that the proposed composite structure achieves average infrared reflectance of 94.1 % in the 3–5 µm band and 89.1 % in the 8–14 µm band, while exhibiting efficient transmission characteristics exceeding 85 % in the 2–15 GHz frequency range and maintaining relatively high transmittance efficiency of 75–85 % in the 15–18 GHz band. By integrating infrared interference and microwave metasurface resonance, this work resolves the incompatibility of conventional materials in thermal management and communication, offering a novel approach to designing multifunctional integrated satellite materials for thermal control and signal transmission.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"149 ","pages":"Article 105901"},"PeriodicalIF":3.1,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143927779","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

Determination of refractive index of crystalline silicon in the infrared region on the basis of interference pattern observed in thick slab 基于厚板干涉图样的晶体硅红外折射率测定

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-05-05 DOI: 10.1016/j.infrared.2025.105889

Jiří Vohánka, Jiří Večeře, Daniel Franta, Ivan Ohlídal

{"title":"Determination of refractive index of crystalline silicon in the infrared region on the basis of interference pattern observed in thick slab","authors":"Jiří Vohánka, Jiří Večeře, Daniel Franta, Ivan Ohlídal","doi":"10.1016/j.infrared.2025.105889","DOIUrl":"10.1016/j.infrared.2025.105889","url":null,"abstract":"<div><div>The precise values of the refractive index of crystalline silicon are determined in the infrared region based on the measurements of the interference pattern in 0.25 mm thick wafer. The interference pattern observed for one particular incidence angle allows us to determine the optical thickness precisely, however, the wafer thickness and refractive index, whose product gives the optical thickness, can be determined with much worse accuracy. This limitation could be overcome by using several incidence angles because if the dependence of the period of interference pattern on the incidence angle is considered, it is possible to determine both the thickness and refractive index with high accuracy. The FTIR infrared ellipsometer is used for measurements at oblique incidence angles, while the FTIR spectrophotometer is utilized for measurements at near-normal incidence. To correctly interpret the experimental data, it is necessary to consider the influence of the finite spectral resolution and beam divergence of the instruments and the thickness non-uniformity of the sample. These effects significantly alter the observed interference patterns. The formulae needed to accomplish this task are derived in this work. The values of the refractive index determined using the proposed method for the crystalline silicon show differences smaller than <span><math><mrow><mn>1</mn><msup><mrow><mn>0</mn></mrow><mrow><mo>−</mo><mn>3</mn></mrow></msup></mrow></math></span> from the values obtained by the minimum deviation method.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"149 ","pages":"Article 105889"},"PeriodicalIF":3.1,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143912623","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

A PCNN model for infrared pedestrian segmentation in complex environments 复杂环境下红外行人分割的PCNN模型

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-05-04 DOI: 10.1016/j.infrared.2025.105897

Honggui Cao , Bo Ye , Yangkun Zou , Zhizhen Zhu , Zijie Wan , Shsoda Yin

{"title":"A PCNN model for infrared pedestrian segmentation in complex environments","authors":"Honggui Cao , Bo Ye , Yangkun Zou , Zhizhen Zhu , Zijie Wan , Shsoda Yin","doi":"10.1016/j.infrared.2025.105897","DOIUrl":"10.1016/j.infrared.2025.105897","url":null,"abstract":"<div><div>Pulse Coupled Neural Network (PCNN) is widely used in infrared pedestrian image segmentation. Due to the complex background, heat source interference, uneven brightness distribution of human targets and easy aliasing with the background in infrared pedestrian images, the segmentation of human targets is incomplete and the segmentation effect is poor. An improved PCNN algorithm for segmenting infrared pedestrian targets in complex environments and a new idea of preferentially segmenting background regions are proposed. The infrared pedestrian image is represented as a graph structure, and the superpixels in the infrared image are represented as nodes of the graph. The score of each node becoming the background region is evaluated by analyzing the structure of the graph, and the score is mapped to the original image as the connection strength of the model. Correspondingly, the dynamic threshold is set as the clustering center of the image background, and the background region of the image is prioritized for classification and output. Infrared pedestrian images with complex environment can be effectively segmented by the model, especially for infrared images with more heat source interference in the background.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"149 ","pages":"Article 105897"},"PeriodicalIF":3.1,"publicationDate":"2025-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916197","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

Geometric calibration for stereo near-infrared camera using an 850 nm illuminant array 850nm光源阵列立体近红外相机几何定标

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-05-02 DOI: 10.1016/j.infrared.2025.105892

Yuchuan Tao, Hongce Liu, Yanhong Fang, Xueyuan Wang

引用次数: 0

Spatial-Frequency Guided Pixel Transformer for NIR-to-RGB translation 用于nir到rgb转换的空间频率引导像素转换器

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-05-01 DOI: 10.1016/j.infrared.2025.105891

Hongcheng Jiang , ZhiQiang Chen

{"title":"Spatial-Frequency Guided Pixel Transformer for NIR-to-RGB translation","authors":"Hongcheng Jiang , ZhiQiang Chen","doi":"10.1016/j.infrared.2025.105891","DOIUrl":"10.1016/j.infrared.2025.105891","url":null,"abstract":"<div><div>Near-Infrared (NIR) imaging is extensively employed in various applications, providing enhanced sensitivity and contrast over traditional visible-spectrum imaging. However, NIR images inherently lack the rich spatial and texture details that visible-color images possess (i.e., images with red, green, and blue bands, or RGB images). NIR-to-RGB translation – the process of converting NIR images to RGB images – has been extensively studied for this purpose. However, existing methods face two inherent challenges in NIR-to-RGB translation: spectral mapping ambiguity and statistical weak correlation. We propose a novel deep-learning architecture, termed Spatial-Frequency Guided Pixel Transformer (SF-GPT), for NIR-to-RGB Translation. Specifically, SF-GPT introduces a Spatial-Frequency Guided Multi-head Self-Attention (SFG-MSA) mechanism, enabling effective feature transfer between spatial-frequency and pixel features. Additionally, by reducing the spatial dimensions of the input images in both feature domains, we mitigate the complexity of the learning process without compromising information integrity. As a result, our method achieves state-of-the-art performance, surpassing existing techniques by over 1.5 dB in PSNR. Code will be available at <span><span>https://github.com/jianghongcheng/SF-GPT</span><svg><path></path></svg></span>.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105891"},"PeriodicalIF":3.1,"publicationDate":"2025-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143902544","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

An Wavelet Steered network for efficient infrared small target detection 小波导向网络用于红外小目标的高效检测

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-30 DOI: 10.1016/j.infrared.2025.105850

Teng Ma , Kuanhong Cheng , Tingting Chai , Yubo Wu , Huixin Zhou

{"title":"An Wavelet Steered network for efficient infrared small target detection","authors":"Teng Ma , Kuanhong Cheng , Tingting Chai , Yubo Wu , Huixin Zhou","doi":"10.1016/j.infrared.2025.105850","DOIUrl":"10.1016/j.infrared.2025.105850","url":null,"abstract":"<div><div>This paper introduces an innovative approach for infrared small target detection (IRSTD). Our model is primarily motivated by the integration of Discrete Wavelet Transform (DWT) into a convolutional neural network (CNN), combining the classical multi-scale analysis method with the deep learning (DL) framework. Firstly, it is argued that detail loss may be induced by downsampling operations such as average or maximize pooling, and the interpolation of upsampling is inefficient in increasing useful information. Therefore, Haar DWT and inverse DWT (IDWT) are embedded for lossless downsampling and upsampling, facilitating more effective feature extraction within the CNN. Secondly, a hybrid attention mechanism, referred to as Wavelet Steered Transformer (WST), is designed to fully enhance the DWT features both spatially and across channels. This mechanism consists of two key improvements: (1) Channel-wise Transformer: We propose adapting a channel-wise Transformer to enhance semantic information and suppress background clutter and noise. This enhancement ensures that the targets and background features are distributed across different channels, thereby boosting detection performance. (2) Dilated-Gate Convolutional Module: A dilated-gate convolutional module is employed to enhance spatial location accuracy. Unlike previous methods for location extraction, this module uses a combination of different kernel sizes and dilation rates to improve spatial accuracy. Experimental results on benchmark datasets showcase the supervisor performance of the proposed method. The code and data for this paper will be released at <span><span>https://github.com/Fortuneteller6/WaveTD</span><svg><path></path></svg></span> once the paper is accepted.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105850"},"PeriodicalIF":3.1,"publicationDate":"2025-04-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892075","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

Temperature distribution and damage of thrombus induced by pulsed laser 脉冲激光致血栓的温度分布及损伤

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-30 DOI: 10.1016/j.infrared.2025.105880

Xiaoli Zhao , Pengtianyu Qiu , Enci Xie , Chenxi Zhang , Guangyu Wang , Bo Fu

引用次数: 0

Direct detection of near-infrared fractional vortex beam 近红外分数涡旋光束的直接探测

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-28 DOI: 10.1016/j.infrared.2025.105893

Hui Zhao , Ruwei Zhao , Qilu Liu , Xiaokang Hu , Tianxiang Xu , Yan Sheng

引用次数: 0

A dual-sphere coupled fiber optic photoacoustic (DSC-FOPA) sensor for CH4 and C2H2 gases simultaneous detection in underground coal mines 用于煤矿井下CH4和C2H2气体同时检测的双球耦合光纤光声传感器(DSC-FOPA

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-28 DOI: 10.1016/j.infrared.2025.105894

Yongle Zhu , Guojie Wu , Yuchen Guan , Zhenfeng Gong , Liang Mei

{"title":"A dual-sphere coupled fiber optic photoacoustic (DSC-FOPA) sensor for CH4 and C2H2 gases simultaneous detection in underground coal mines","authors":"Yongle Zhu , Guojie Wu , Yuchen Guan , Zhenfeng Gong , Liang Mei","doi":"10.1016/j.infrared.2025.105894","DOIUrl":"10.1016/j.infrared.2025.105894","url":null,"abstract":"<div><div>This paper presents, for the first time, a novel dual-sphere coupled fiber optic photoacoustic (DSC-FOPA) sensor for simultaneous sensing of acetylene (C<sub>2</sub>H<sub>2</sub>) and methane (CH<sub>4</sub>) in coal mines. The sensor mainly contains a silicon cantilever fiber optic microphone (SC-FOM), a dual-sphere coupled photoacoustic resonator (DSC-PAR). The performance of the DSCR is optimized through simulation analysis, demonstrating that the DSCR with two resonance peaks can be used for CH<sub>4</sub> and C<sub>2</sub>H<sub>2</sub> gas sensing, respectively. In addition, the dimensions of the SC-FOM are optimized by simulation analysis to match the second resonance peak of the DSC-PAR to achieve the dual-resonance photoacoustic signal enhancement effect. Trace CH<sub>4</sub> and C<sub>2</sub>H<sub>2</sub> gases have been successfully implemented in experimental measurements. The limit of detections (LODs) of the DSC-FOPA sensor are 911 and 34 part per billion (ppb) for CH<sub>4</sub> and C<sub>2</sub>H<sub>2</sub> respectively.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105894"},"PeriodicalIF":3.1,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143904549","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

Optically transparent infrared stealth metamaterials based on frequency-selective thermal radiator 基于频率选择热辐射体的光学透明红外隐身材料

IF 3.1 3区物理与天体物理

Infrared Physics & Technology Pub Date : 2025-04-28 DOI: 10.1016/j.infrared.2025.105888

Cuilian Xu , Jinming Jiang , Mingbao Yan , Wenjie Wang , Lei Wang , Jun Wang , Sai Sui , Qi Fan , Jiafu Wang

{"title":"Optically transparent infrared stealth metamaterials based on frequency-selective thermal radiator","authors":"Cuilian Xu , Jinming Jiang , Mingbao Yan , Wenjie Wang , Lei Wang , Jun Wang , Sai Sui , Qi Fan , Jiafu Wang","doi":"10.1016/j.infrared.2025.105888","DOIUrl":"10.1016/j.infrared.2025.105888","url":null,"abstract":"<div><div>Metamaterials provide amazing opportunities for developing frequency selective radiation because of their unique electromagnetic resonance properties. However most frequency-selective thermal radiation metamaterials currently do not have an optical transparency property, which prevents them from being used in some special occasions. Here, an optically transparent frequency-selective thermal radiator is designed and fabricated using the metallic-like properties of ITO. The emissivity of the metamaterial in the atmospheric transparent windows (3.0–5.0 μm and 8.0–14.0 μm) is less than 0.1, while the emissivity outside the windows (5.5–7.6 μm) is very high, thus achieving strong thermal radiation efficiency. Finally, the thermal radiation power of frequency-selective thermal radiator, low-emissivity coatings, and black body was analyzed using the thermal radiation model. Compared to traditional low-emissivity coatings, the advantage of frequency-selective thermal radiators is that it provides an efficient thermal radiation window for the target, further enhancing its infrared stealth capability through radiative cooling.</div></div>","PeriodicalId":13549,"journal":{"name":"Infrared Physics & Technology","volume":"148 ","pages":"Article 105888"},"PeriodicalIF":3.1,"publicationDate":"2025-04-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143892074","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