Optik最新文献_第8页

Fabrication approaches for THz metasurfaces: A comprehensive review 太赫兹元表面的制备方法综述

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-30 DOI: 10.1016/j.ijleo.2025.172664

Meraline Selvaraj, Sreeja B S

Over the past decade, metamaterials have emerged as a revolutionary class of engineered materials, capturing significant attention across diverse scientific domains. Metasurfaces, composed of two-dimensional arrays of engineered meta-atoms, offer precise control over electromagnetic wave amplitude, phase, and polarization at subwavelength scales. This capability makes them an ideal platform for the design of ultra-compact, high-performance components in the THz regime. A critical challenge in transitioning these innovations to practical applications lies in the scalable fabrication of large-area, uniform, and high-resolution micro/nanostructures compatible with THz operation. This review explores the current state-of-the-art fabrication techniques for THz metasurfaces, including lithography, two-photon polymerization, 3D printing, and other advanced fabrication techniques. Each technique’s applicability, advantages, and limitations in achieving structural precision and optimal performance are highlighted. Additionally, challenges in the THz metasurface fabrication are addressed, along with potential solutions to guide future advancements in high-performance THz devices.

在过去的十年里，超材料已经成为一种革命性的工程材料，在不同的科学领域引起了极大的关注。由工程元原子的二维阵列组成的超表面可以精确控制电磁波的振幅、相位和亚波长尺度的极化。这种能力使它们成为设计超紧凑、高性能太赫兹波段组件的理想平台。将这些创新转化为实际应用的一个关键挑战在于，如何可扩展地制造与太赫兹操作兼容的大面积、均匀和高分辨率微/纳米结构。这篇综述探讨了目前最先进的太赫兹超表面的制造技术，包括光刻、双光子聚合、3D打印和其他先进的制造技术。强调了每种技术在实现结构精度和最佳性能方面的适用性、优点和局限性。此外，还解决了太赫兹超表面制造中的挑战，以及指导高性能太赫兹器件未来发展的潜在解决方案。

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引用次数: 0

MAPbBr3-2D material based on ultrahigh efficiency urine glucose detection SPR sensor 基于MAPbBr3-2D材料的超高效尿糖检测SPR传感器

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-30 DOI: 10.1016/j.ijleo.2025.172655

Alagu Vibisha G , Senthilkumar V , Priyadharsini N , Habibur Rahman S.M. , Jaroszewic Z , Rajesh K.B.

This study presents a high-performance surface plasmon resonance (SPR) biosensor employing a novel hybrid Kretschmann configuration for non-invasive urine glucose monitoring in diabetes management. The sensor integrates a CaF₂ prism, an optimized Cu-Ni bimetallic layer, a MAPbBr₃ perovskite sensitivity-enhancer, and a 2D nanomaterial interface to facilitate biomolecular interactions. Comprehensive numerical modeling via the transfer matrix method demonstrates exceptional performance, revealing a progressive angular sensitivity increase (330–615.1°/RIU) across clinically relevant glucose concentrations (0.625–10gdL^-¹). Achieved figures of merit (151.6–186.9RIU^-¹) confirm the platform's analytical precision. Featuring cost-effective fabrication potential, remarkable stability, and superior sensitivity, this SPR biosensor offers significant promise for developing practical non-invasive diabetes monitoring solutions.

本研究提出了一种高性能表面等离子体共振（SPR）生物传感器，采用一种新型的混合Kretschmann配置，用于糖尿病管理中的无创尿糖监测。该传感器集成了一个CaF2棱镜、一个优化的Cu-Ni双金属层、一个MAPbBr3钙钛矿灵敏度增强剂和一个二维纳米材料界面，以促进生物分子相互作用。通过传递矩阵方法进行的综合数值模拟显示了卓越的性能，揭示了在临床相关葡萄糖浓度（0.625-10gdL -¹）下，角敏感性逐渐增加（330-615.1°/RIU）。获得的优异值（151.6-186.9RIU -¹）证实了平台的分析精度。具有成本效益的制造潜力，卓越的稳定性和卓越的灵敏度，这种SPR生物传感器为开发实用的非侵入性糖尿病监测解决方案提供了重要的希望。

引用次数: 0

Evaluating short term financial marketing bitcoin prediction: A comparative analysis of large-kernel attention graph convolutional networks across various prediction horizon 评估短期金融营销比特币预测：跨不同预测范围的大核注意图卷积网络的比较分析

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-29 DOI: 10.1016/j.ijleo.2025.172663

Mohideen AbdulKader M , Sudhansu Sekhar Nanda , K. Sampath , D. Barani

One of the most popular investment assets nowadays is Bitcoin. The financial market volatility of bitcoin's price has drawn the attention of researchers and investors alike to the ways in which its price fluctuates. The paper proposes an evaluation of Short Term Financial Marketing Bitcoin Prediction: A Comparative Analysis of Large-Kernel Attention Graph Convolutional Networks across Various Prediction Horizons (BP-ST-LAGCN-NOA) for short-term Bitcoin market prediction. Then, pre-processed data are fed to the Large-kernel Attention Graph Convolutional Network (LAGCN) to effectively predict the bitcoin market in the short term. LAGCN does not express adaptive optimization strategies to determine optimal factors to effectively predict the Bitcoin market. Hence, the Nutcracker Optimization Algorithm (NOA) is employed to optimize the weight parameter of the Large-kernel Attention Graph Convolutional Network to predict the bitcoin market. Then the proposed BP-ST-LAGCN-NOA is implemented in Python, and the performance metrics like Accuracy, Precision, Recall, Specificity, F1-score, and ROC are analysed. The BP-ST-LAGCN-NOA model achieves 99.64 % accuracy, 99.21 % precision, 99.18 % recall, 98.14 % F1-Score and 98.47 % specificity, outperforming all baseline methods. The BP-ST-LAGCN-NOA model demonstrates superior accuracy and robustness in short-term Bitcoin market prediction, outperforming existing machine learning (ML) and deep learning (DL) approaches.

如今最受欢迎的投资资产之一是比特币。比特币价格在金融市场上的波动引起了研究人员和投资者对其价格波动方式的关注。本文提出了短期金融营销比特币预测的评价：跨不同预测视界的大核注意图卷积网络（BP-ST-LAGCN-NOA）对短期比特币市场预测的比较分析。然后，将预处理后的数据输入到大核注意图卷积网络（LAGCN）中，有效预测比特币短期市场走势。LAGCN没有表达自适应优化策略来确定最优因素，从而有效地预测比特币市场。因此，采用胡桃夹子优化算法（NOA）对大核注意图卷积网络的权重参数进行优化，预测比特币市场。然后用Python实现了BP-ST-LAGCN-NOA，并对准确率、精密度、召回率、特异性、F1-score和ROC等性能指标进行了分析。BP-ST-LAGCN-NOA模型准确率为99.64 %，精密度为99.21 %，召回率为99.18 %，F1-Score为98.14 %，特异性为98.47 %，优于所有基线方法。BP-ST-LAGCN-NOA模型在短期比特币市场预测中表现出卓越的准确性和鲁棒性，优于现有的机器学习（ML）和深度学习（DL）方法。

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引用次数: 0

Optical radiation forces on Rayleigh spheres produced by focused vortex higher-order cosine-hyperbolic-Gaussian beams 聚焦涡高阶余弦双曲高斯光束对瑞利球产生的光辐射力

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-27 DOI: 10.1016/j.ijleo.2025.172654

Abdellah Ahlane, Salma Chib, Zoubir Hricha, Abdelmajid Belafhal

We present a theoretical investigation of the optical radiation forces exerted by highly focused vortex higher-order cosine-hyperbolic-Gaussian beams (vHOChGBs) on Rayleigh dielectric spheres. Analytical expressions for the focused vHOChGBs field and the resulting gradient and scattering forces are derived, explicitly revealing their dependence on key beam parameters (decentering b, beam order N, topological charge m), particle characteristics, and the environment medium. Numerical results show that the structured intensity profiles of vHOChGBs enable simultaneous trapping of low and high-index particles. High-index particles localize in bright focal regions, while low-index particles are confined into inter-lobe minima. Stability analysis establishes that gradient forces dominate scattering and thermal effects across parameter spaces, with beam waist ω₀ and topological charge m critically governing trapping potential depths. This parametric flexibility could allow precision assembly of micro/nanostructures and non-invasive biological specimen handling, advancing vHOChGBs as versatile tools for optical tweezers and biophotonics applications.

本文从理论上研究了高聚焦涡旋高阶余弦双曲高斯光束在瑞利介质球上施加的光辐射力。推导了聚焦vHOChGBs场及其梯度和散射力的解析表达式，明确揭示了它们与关键光束参数（离心b、光束阶数N、拓扑电荷m）、粒子特性和环境介质的依赖关系。数值结果表明，vhochgb的结构强度分布可以同时捕获低指数和高指数粒子。高折射率粒子集中在明亮的焦点区域，而低折射率粒子则局限在瓣间极小值区域。稳定性分析表明，梯度力在参数空间中的散射和热效应占主导地位，束腰ω0和拓扑电荷m对捕获电位深度起关键控制作用。这种参数灵活性可以实现微/纳米结构的精确组装和非侵入性生物标本处理，使vhochgb成为光学镊子和生物光子学应用的多功能工具。

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引用次数: 0

Generation of quantum coherence in a magnomechanical system 磁力学系统中量子相干性的产生

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-23 DOI: 10.1016/j.ijleo.2025.172653

Mulugeta Tadesse Bedore , Tesfay Gebremariam Tesfahannes , Tewodros Yirgashewa Darge , Menisha Alemu Tufa , Abdelkader Hidki , Habtamu Dagnaw Mekonnen , Muhdin Abdo Wodedo , Philippe Djorwe

We investigate macroscopic quantum coherence in a hybrid magnomechanical system consisting of a microwave cavity with a yttrium iron garnet (YIG) sphere coupled to an auxiliary microwave cavity. By solving the Lyapunov equation and analyzing the steady-state mean values, we use the magnetic dipole interaction between the cavity mode and the magnon mode, as well as the magnetostrictive interaction between the magnon mode and the mechanical vibrations of the YIG sphere, to generate and transfer Gaussian quantum coherence across different subsystems. Our results reveal that significant quantum coherence can be realized between various bipartitions, even at high temperatures. We identify optimal parameter regimes that enhance coherence, offering insights into the robust generation and control of quantum correlations in macroscopic systems. These findings contribute to the advancement of macroscopic quantum technologies and highlight promising directions for quantum information processing.

我们研究了一个由钇铁石榴石球耦合到辅助微波腔的微波腔组成的混合磁力学系统中的宏观量子相干性。通过求解Lyapunov方程和分析稳态平均值，我们利用腔模式和磁振子模式之间的磁偶极相互作用，以及磁振子模式和YIG球的机械振动之间的磁致伸缩相互作用，在不同子系统之间产生和传递高斯量子相干性。我们的研究结果表明，即使在高温下，不同双分频之间也可以实现显著的量子相干性。我们确定了增强相干性的最佳参数制度，为宏观系统中量子相关性的鲁棒生成和控制提供了见解。这些发现有助于宏观量子技术的进步，并突出了量子信息处理的有前途的方向。

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引用次数: 0

An automated measurement method for dendritic structures in laser cladding coatings using deep learning 基于深度学习的激光熔覆层枝晶结构自动测量方法

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-19 DOI: 10.1016/j.ijleo.2025.172643

Fang Guo , Longmei Luo , Xueming Zhang , Mengsi Zhang , Youji Zhan , Guofu Lian

To enhance the efficiency of intelligent recognition of the microstructure of laser cladding coatings and optimize the evaluation methods for coating performance and quality, we introduce an image segmentation model called DendriticNet and develops an automated measurement method for the dendritic structure images of laser cladding coatings. The DendriticNet model enables precise pixel-level segmentation and recognition of three types of dendritic structures—dendritic, bulk, and equiaxed crystals—effectively overcoming the limitations of traditional metallographic recognition methods. This provides efficient and accurate technical support for the microstructural analysis of laser cladding coatings. The DendriticNet model combines transfer learning with the Res_CSP attention mechanism module, enabling accurate recognition in complex scenarios involving varying scales and overlapping dendritic structures. Additionally, it achieves qualitative characterization of dendritic microstructures at the micron scale. Experimental results demonstrate that the DendriticNet model achieves an mIoU of 80.31 %, an MPA of 88.43 %, and an accuracy of 93.01 %. By integrating the predicted images produced by the DendriticNet model with the automatic measurement method for dendritic microstructure images of laser cladding coatings, quantitative analysis is conducted to automatically calculate the density ratios of various dendritic structures. Experimental results demonstrate that the measurement accuracy for the total dendritic density ratio exceeds 96.6 %, confirming the feasibility and effectiveness of this automatic measurement method. This approach not only enables the quantitative characterization of dendritic structures at the micron scale but also offers an innovative solution for exploring the relationship between the microstructure and macroscopic performance of coatings.

为了提高激光熔覆涂层微观结构的智能识别效率，优化涂层性能和质量的评价方法，我们引入了一种名为DendriticNet的图像分割模型，并开发了一种用于激光熔覆涂层树枝状结构图像的自动测量方法。DendriticNet模型能够精确的像素级分割和识别三种类型的枝晶结构-枝晶，块状和等轴晶体-有效地克服了传统金相识别方法的局限性。这为激光熔覆涂层的显微组织分析提供了高效、准确的技术支持。DendriticNet模型将迁移学习与Res_CSP注意机制模块相结合，能够在涉及不同规模和重叠树突结构的复杂场景中进行准确识别。此外，它还实现了微米尺度上枝晶微观结构的定性表征。实验结果表明，该模型的mIoU为80.31 %，MPA为88.43 %，准确率为93.01 %。将DendriticNet模型生成的预测图像与激光熔覆涂层枝晶微观结构图像自动测量方法相结合，进行定量分析，自动计算出各种枝晶结构的密度比。实验结果表明，总枝晶密度比的测量精度超过96.6% %，验证了该自动测量方法的可行性和有效性。这种方法不仅能够在微米尺度上定量表征树枝状结构，而且为探索涂层微观结构与宏观性能之间的关系提供了一种创新的解决方案。

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引用次数: 0

Dual-resonance multilayer Tamm plasmon polariton biosensor for cancer cell detection 用于癌细胞检测的双共振多层Tamm等离子激元生物传感器

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-18 DOI: 10.1016/j.ijleo.2025.172642

Ahmed Sameer Hatem Alani, Aqilah Baseri Huddin, Norhana Arsad

This work presents a highly efficient multilayer biosensor based on dual‑resonance Tamm plasmon polaritons (TPPs), designed for ultra‑sensitive detection of lung cancer cells. The sensor employs a thin metal-dielectric interface integrated atop an all-dielectric photonic crystal, enabling two ultra-narrowband resonances under normal incidence without the use of coupling prisms or gratings. Numerical modeling using the transfer matrix method (TMM) confirms strong field confinement at the metal-sample interface, resulting in high spectral selectivity and dual resonance modes with full width at half maximum (FWHM) values of 0.133 nm and 0.143 nm. The corresponding quality factors (Q) reach 4029 and 3778, and figures of merit (FoM) are 90 RIU⁻¹ and 106 RIU⁻¹, respectively. The device exhibits sensitivities of 12 nm/RIU and 15.1 nm/RIU for a refractive index variation of Δn_S = 0.01. For biological testing with A549 lung cells, resonance shifts of 0.20 nm and 0.23 nm are observed between healthy (n = 1.3662) and cancerous (n = 1.3568) samples. Considering a spectrometer resolution of 0.1 nm, the minimum detectable refractive index changes are 8.3 × 10⁻³ RIU and 6.6 × 10⁻³ RIU for the two resonances. Due to its ultra‑narrow linewidth, high FoM, label‑free operation, and compatibility with standard thin‑film fabrication, the proposed TPP‑based biosensor offers a compact and accurate platform for real‑time optical cancer diagnostics.

本工作提出了一种基于双共振Tamm等离子激元极化（TPPs）的高效多层生物传感器，设计用于超灵敏检测肺癌细胞。该传感器采用集成在全介电光子晶体顶部的薄金属-介电界面，在正常入射下实现两个超窄带共振，而无需使用耦合棱镜或光栅。利用传递矩阵法（TMM）的数值模拟证实了金属-样品界面处的强场约束，从而产生了高光谱选择性和半最大值全宽度（FWHM）值分别为0.133 nm和0.143 nm的双共振模式。相应的质量因子(Q)达到4029和3778，品质因数（FoM）分别为90 RIU−1和106 RIU−1。灵敏度分别为12 nm/RIU和15.1 nm/RIU，折射率变化为ΔnS = 0.01。在A549肺细胞的生物学检测中，健康样本（n = 1.3662）和癌变样本（n = 1.3568）的共振位移分别为0.20 nm和0.23 nm。考虑到0.1 nm的光谱仪分辨率，两个共振的最小可探测折射率变化分别为8.3 × 10−3 RIU和6.6 × 10−3 RIU。由于其超窄线宽、高FoM、无标签操作以及与标准薄膜制造的兼容性，所提出的基于TPP的生物传感器为实时光学癌症诊断提供了一个紧凑而准确的平台。

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引用次数: 0

Increasing the depth of focus in mirror optical systems using high-order aspheric coefficients 利用高阶非球面系数增加镜面光学系统的聚焦深度

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-18 DOI: 10.1016/j.ijleo.2025.172646

Noe Vazquez-Osorio , Jorge Castro-Ramos , Alexis Vázquez-Villa , Freddy Narea-Jiménez

Depth of focus (DoF) is a fundamental property of optical systems, as it influences key aspects such as image quality, resolution, and tolerance. A method is presented to increase the DoF by adding high-order aspherical coefficients to one of the mirrors of the optical system. The developed method applies to finite and infinite conjugate mirror systems. Using the focal length function, the rays are positioned to determine the aspheric deformation, based on exact ray tracing and the proposed condition of equalizing the optical paths of a marginal and a paraxial ray. Two optical systems are presented. First, a microscope objective with a light sheet length increased by 390 % compared to a classic system. Second, a Telescope with a DoF of 1000

μ m

was designed. The results demonstrate the method's versatility, quickly and easily extending the DoF.

焦深（DoF）是光学系统的基本属性，因为它影响到图像质量、分辨率和公差等关键方面。提出了一种通过在光学系统的一个反射镜上增加高次非球面系数来提高光学系统景深的方法。该方法适用于有限和无限共轭镜系统。利用焦距函数，基于精确的光线跟踪和提出的平衡边缘光路和傍轴光路的条件，对光线进行定位以确定非球面变形。介绍了两种光学系统。首先，与经典系统相比，显微镜物镜的光片长度增加了390 %。其次，设计了焦距为1000 μm的望远镜。结果表明，该方法具有通用性强、扩展速度快、方便等优点。

引用次数: 0

Contingent bit-pair based high capacity reversible data hiding technique in encrypted images for secure message communication 基于随机位对的加密图像高容量可逆数据隐藏技术

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-18 DOI: 10.1016/j.ijleo.2025.172645

Sanjay Kumar , KJ Shruthikeerthi , Gurjit Singh Walia , Dhana Lakshmi MP

Reversible Data Hiding (RDH) in the encrypted domain has gained significant attention due to its wide range of applications and the growing need for security and privacy in secure communication. However, existing methods often face challenges, including low embedding capacity, high communication overhead, security vulnerabilities, and overflow/underflow. Addressing these limitations, this paper proposes an efficient separable RDH in Encrypted Images (RDH-EI) method based on a contingent bit-pair. Embedding data at the contingent bit-pair level enhances the embedding capacity and fortifies the security and privacy of both the user message and the plain cover. The embedding process modifies the Most Significant Bits (MSBs) of interpolated pixels according to the proposed bit-pair rule set. Each encrypted cover byte can contribute up to seven bits for data embedding, enabling greater data concealment. At the receiving end, the extraction process recovers the embedded message by reconstructing it using the XOR operation and the plain cover by reversing the encryption, requiring no overhead for recovery. The proposed method is evaluated against state-of-the-art techniques, and results demonstrate significant enhancements in embedding capacity. It achieves a maximum embedding capacity of 455,175 bits at a bit rate of 1.7432 bpp, utilizing minimal execution time over BOWS2, USC-SIPI, and Kodak datasets, low distortion, and perfect reversibility, making it suitable for secure data transmission.

加密领域的可逆数据隐藏（RDH）由于其广泛的应用以及在安全通信中对安全性和保密性日益增长的需求而引起了人们的广泛关注。然而，现有方法往往面临嵌入容量低、通信开销大、安全漏洞和溢出/下溢等挑战。针对这些限制，本文提出了一种基于偶然位对的有效的可分离加密图像RDH方法。在偶然位对级别嵌入数据增强了嵌入能力，增强了用户消息和普通覆盖的安全性和隐私性。嵌入过程根据提出的位对规则集修改插值像素的最高有效位（msb）。每个加密的覆盖字节可以为数据嵌入贡献多达7位，从而实现更大的数据隐藏。在接收端，提取过程通过使用异或操作重构嵌入的消息来恢复它，通过反转加密来恢复普通覆盖，不需要恢复开销。所提出的方法与最先进的技术进行了评估，结果表明嵌入能力显著增强。它以1.7432 bpp的比特率实现了455,175位的最大嵌入容量，在BOWS2， USC-SIPI和Kodak数据集上使用最小的执行时间，低失真和完美的可逆性，使其适合安全数据传输。

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引用次数: 0

Investigation of photoluminescence, dosimetric, and imaging properties of Sr3La(PO4)3: Tb Sr3La(PO4) 3tb的光致发光、剂量学和成像特性研究

IF 3.1 3区物理与天体物理 Q2 Engineering

Optik

Pub Date : 2025-12-14 DOI: 10.1016/j.ijleo.2025.172644

Haruaki Ezawa, Takumi Kato, Daisuke Nakauchi, Noriaki Kawaguchi, Takayuki Yanagida

We prepared the non-doped and Tb: Sr₃La(PO₄)₃ (SLaPO) single crystals with Tb concentrations ranging from 0.5 to 10 mol% using the floating zone method and evaluated photoluminescence (PL), dosimetric, and imaging properties. The Tb: SLaPO single crystals exhibited PL and thermally stimulated luminescence (TSL) peaks corresponding to the transitions from the ground state to the excited states of Tb^3 + ions. The TSL glow peaks were observed at 80°C for the non-doped SLaPO single crystal and 90°C for Tb: SLaPO single crystals. In the TSL does response function, the 5 mol% Tb: SLaPO sample showed a higher TSL intensity compared to the other samples with a detection limit of 0.01 mGy. Additionally, the 5 mol% Tb: SLaPO single crystal indicated a spatial resolution of 7.10 LP/mm after X-ray irradiation.

我们采用浮区法制备了Tb浓度为0.5 ~ 10 mol%的未掺杂和Tb: Sr3La(PO4)3 （SLaPO）单晶，并对其光致发光（PL）、剂量学和成像性能进行了评价。Tb: SLaPO单晶表现出与Tb3 +离子从基态到激发态的转变相对应的PL和热激发发光（TSL）峰。未掺杂的SLaPO单晶和Tb: SLaPO单晶分别在80°C和90°C下观察到TSL发光峰。在TSL响应函数中，5 mol% Tb: SLaPO样品的TSL强度高于其他样品，检出限为0.01 mGy。5 mol% Tb: SLaPO单晶经x射线辐照后的空间分辨率为7.10 LP/mm。

引用次数: 0