Photonics and Nanostructures-Fundamentals and Applications最新文献_第3页

Scattering of electromagnetic waves by spherical dielectric cavities with double-sided impedance boundary conditions 具有双面阻抗边界条件的球形介质腔对电磁波的散射

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2026-02-01 Epub Date: 2026-01-12 DOI: 10.1016/j.photonics.2026.101503

Emre İşcan

This study presents the scattering by arbitrarily oriented Hertzian dipoles from a spherical dielectric cavity with a circular aperture, bounded by different impedance conditions on its spherical surfaces. The formulation applies the method of auxiliary sources (MAS) together with Leontovich boundary conditions to investigate how source location, aperture geometry, dielectric constant, and impedance characteristics effect the resonance and radiation behavior of the semi-open cavity. The scattered fields inside and outside the structure are represented by orthogonal auxiliary dipoles distributed on auxiliary surfaces, formulated in accordance with Huygens’s principle, which ensures accurate boundary enforcement while removing singularities in the integral equations. Numerical results are presented for a wide range of configurations, revealing the impact of aperture variation, dielectric media, boundary impedances and source placement on both the total radar cross section and near-field distributions. The resonance characteristics are systematically analyzed, and the approach is verified against established solutions in limiting cases. In comparison with conventional full-wave computational methods, the MAS provides high accuracy with significantly reduced computational time and memory usage. The results confirm the efficiency and reliability of the proposed algorithm for analyzing spherical dielectric cavities with impedance boundary conditions.

本文研究了任意取向的赫兹偶极子在具有圆形孔径的球形介质腔中的散射，其球面上有不同的阻抗条件。该公式采用辅助源（MAS）方法，结合Leontovich边界条件，研究了源位置、孔径几何形状、介电常数和阻抗特性对半开腔谐振和辐射行为的影响。结构内外的散射场由分布在辅助表面上的正交辅助偶极子表示，根据惠更斯原理表示，保证了精确的边界执行，同时消除了积分方程中的奇异性。数值结果显示了孔径变化、介质、边界阻抗和源位置对雷达总截面和近场分布的影响。系统地分析了谐振特性，并在极限情况下用已建立的解对该方法进行了验证。与传统的全波计算方法相比，MAS提供了更高的精度，显著减少了计算时间和内存使用。结果证实了该算法在具有阻抗边界条件的球形介质腔分析中的有效性和可靠性。

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引用次数: 0

Analytical modeling of plasmonic properties of materials with surface defects 表面缺陷材料等离子体特性的解析建模

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2026-02-01 Epub Date: 2026-01-11 DOI: 10.1016/j.photonics.2026.101501

Anton V. Dyshlyuk , Oleg B. Vitrik

An efficient analytical method is introduced to describe electrodynamic phenomena occurring in nanoscale imperfections on material surfaces, particularly focusing on low-aspect-ratio dome-like 2D protrusions and depressions on the surface of plasmonic metals. The model provides compact formulas for calculating the distribution of polarization charges directly on the defect surface, valid for smooth (edge-free) geometries of irregularities. Meanwhile, the corresponding plasmonic near-field is represented in integral form, allowing straightforward numerical integration even for arbitrary realistic geometries.Additionally, the model separately accounts for their resonant properties, ensuring precise quantitative assessment of the localized surface plasmon resonance effect. For Gaussian-profiled 2D defects, the model additionally yields a compact expression for computing corrections to the dipole moment in the Born approximation. Comprehensive validation using full-wave finite element numerical simulations demonstrates excellent agreement with experimental data, underscoring the high level of precision and versatility offered by the new approach. Since surface-engineered materials play a pivotal role in emerging areas such as bio-sensing, renewable energy systems, and integrated nanophotonic devices, understanding how geometric features influence localized plasmonic responses is essential for advancing these technologies towards higher performance and broader applications. Unlike traditional computational models requiring significant computational effort, especially for complex defect shapes, our method enables rapid evaluation of key electrodynamic quantities while maintaining aceptable accuracy across various scenarios. The proposed framework facilitates better predictions and optimized utilization of plasmonic effects in varied contexts, such as enhancing biosensor performance, improving solar cell efficiencies, and enabling innovations in adaptive metamaterials.

介绍了一种有效的分析方法来描述材料表面纳米级缺陷中发生的电动力学现象，特别是关注等离子体金属表面的低纵横比圆顶状二维凸起和凹陷。该模型为直接计算缺陷表面极化电荷分布提供了简洁的公式，适用于不规则的光滑（无边缘）几何形状。同时，相应的等离子体近场以积分形式表示，即使对任意实际几何形状也允许直接的数值积分。此外，该模型单独考虑了它们的共振特性，确保了局部表面等离子体共振效应的精确定量评估。对于高斯型二维缺陷，该模型还产生了一个紧凑的表达式，用于计算玻恩近似中偶极矩的修正。利用全波有限元数值模拟进行的综合验证与实验数据非常吻合，强调了新方法提供的高水平精度和多功能性。由于表面工程材料在生物传感、可再生能源系统和集成纳米光子器件等新兴领域发挥着关键作用，因此了解几何特征如何影响局部等离子体响应对于推进这些技术向更高性能和更广泛应用至关重要。不像传统的计算模型需要大量的计算工作，特别是对于复杂的缺陷形状，我们的方法能够快速评估关键的电动力学量，同时在各种情况下保持可接受的精度。提出的框架有助于更好地预测和优化等离子体效应在各种情况下的利用，例如增强生物传感器性能，提高太阳能电池效率，以及实现自适应超材料的创新。

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引用次数: 0

Epsilon-near-zero nonlinearity driven all-optical modulation in quasi-bound state in the continuum metasurfaces 连续介质超表面准束缚态的epsilon近零非线性驱动全光调制

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2026-02-01 Epub Date: 2026-01-13 DOI: 10.1016/j.photonics.2026.101504

Shuang Li, Lixun Sun, Jiajie Chen, Qiwei Miao, Xin Wang, Yuyang Xiao, Ting Mei

Enhancing optical nonlinearity is crucial for the advancement of compact and efficient photonic devices, enabling new capabilities in frequency conversion, harmonic generation, and all-optical switching. This study investigates the enhancement of epsilon-near-zero nonlinearity in indium tin oxide films through the integration of a quasi-bound state in the continuum (q-BIC) metasurface, which is composed of periodic, centrosymmetric circular hole structures. Near-perfect (>95 %) light absorption under normal incidence is achieved by creating an overlap between the q-BIC and a simultaneous surface lattice resonance mode in the frequency domain through optimizing the structural parameters. Pump-probe measurements reveal significant modulation in transmission (≈20 %) under optical excitation, along with a rapid response time (2.766 ps) suitable for high-speed applications. These findings are anticipated to contribute to the development of advanced optical devices that leverage all-optical modulation for high-speed data processing and communication applications.

增强光学非线性对于推进紧凑和高效的光子器件至关重要，从而实现频率转换，谐波产生和全光开关的新功能。本研究通过在连续介质（q-BIC）超表面（由周期性、中心对称的圆孔结构组成）中集成准束缚态，研究了氧化铟锡薄膜中epsilon-近零非线性的增强。通过优化结构参数，在频域上形成q-BIC和同时存在的表面晶格共振模式之间的重叠，实现了法向入射下近乎完美的光吸收（>95 %）。泵浦探针测量显示，在光激发下，传输调制显著（≈20 %），响应时间快速（2.766 ps），适用于高速应用。预计这些发现将有助于开发利用全光调制进行高速数据处理和通信应用的先进光学器件。

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引用次数: 0

Modification of wettability on fused silica surface via laser-induced nanostructures for enhanced capture of polystyrene particles 用激光诱导纳米结构修饰熔融二氧化硅表面润湿性以增强聚苯乙烯颗粒的捕获

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2026-01-01 Epub Date: 2025-11-26 DOI: 10.1016/j.photonics.2025.101480

Chunyu Li , Elena Petrova , Sabina Bikmetova , Denis V. Danilov , Dmitry Zuev , Eduard Ageev

Self-assembly is an effective instrument for organization of nano- and microparticles to specially designed surface patterns. To obtain the uniform distribution of nano-and microparticles in mask-free self-assembly, the “coffee ring” effect should be carefully avoided. In this study, we propose an approach for effective limitation of such an effect on fused silica surfaces through femtosecond generation of laser-induced periodical surface structures (LIPSS). First, we determine optimal irradiation parameters to provide a higher ratio between LIPSS covered (treated) and untreated surface. Then we study a LIPPS formation in a scanning mode to cover the substrate by LIPSS reducing a contact angle. We demonstrate that scanning laser parameters with frequency of 1 kHz, pulse duration of 270 fs, laser peak fluence of 6.5 J/cm² and scanning period of 9 µm ensure a high rate of surface wettability adjustment (0.23 mm²/min) with a contact angle of ∼ 9 ± 0.5°. Droplet tests with colloidal solution of polystyrene sub-micron (～900 nm) particles demonstrate that “coffee ring” effect is considerably reduced with more than 50 % particles captured inside laser-scanned lines. The demonstrated results are prospective for creation of various photonic structures and systems through mask-free self-assembly.

自组装是将纳米和微粒组织成特定表面图案的有效手段。为了在无掩膜自组装中获得纳米和微粒的均匀分布，应小心避免“咖啡环”效应。在本研究中，我们提出了一种通过飞二代激光诱导周期表面结构（LIPSS）有效限制熔融二氧化硅表面这种影响的方法。首先，我们确定最佳辐照参数，以提供更高的LIPSS覆盖（处理）和未处理表面之间的比率。然后，我们研究了在扫描模式下，通过LIPSS减小接触角来覆盖衬底的LIPPS形成。我们证明，扫描激光参数为1 kHz，脉冲持续时间为270 fs，激光峰值通量为6.5 J/cm2，扫描周期为9 µm，确保了高表面润湿性调节速率（0.23 mm2/min），接触角为~ 9 ± 0.5°。用聚苯乙烯亚微米（~900 nm）颗粒的胶体溶液进行的液滴试验表明，“咖啡环”效应显著降低，激光扫描线内捕获的颗粒超过50% %。所证明的结果为通过无掩模自组装创建各种光子结构和系统提供了前景。

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引用次数: 0

Control over bow-tie antenna radiation via Mie-resonant dielectric particles 通过介电粒子共振控制领结天线辐射

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2026-01-01 Epub Date: 2025-12-12 DOI: 10.1016/j.photonics.2025.101490

Andrey A. Zarenin , Dmitry V. Zhirihin , Dmitry S. Filonov

The use of wideband and ultra-wideband antennas is pivotal for modern wireless communication systems, including 5 G and 6 G. A critical aspect of their functionality is the precise control over the operational bandwidth to ensure signal integrity and mitigate interference. In this work, we introduce a novel method for dynamic antenna control using Mie-resonant dielectric particles. We demonstrate that integrating compact, all-dielectric spherical and cylindrical resonators with a bow-tie antenna enables the creation of well-defined stopbands within its operational spectrum, effectively filtering undesirable frequencies without the losses associated with metallic elements. Furthermore, we unveil a groundbreaking thermal tuning mechanism by exploiting the temperature-dependent permittivity of ceramic materials. This approach allows for the active shifting of these stopbands, dynamically reconfiguring the antenna's operational bandwidth. Our results, validated through numerical simulations at 5 G high-band frequencies, show a new paradigm of a simple and efficient approach of antenna radiation control, paving the way for intelligent, adaptive and environmentally robust communication devices.

宽带和超宽带天线的使用是现代无线通信系统的关键，包括5 G和6 G。其功能的一个关键方面是对操作带宽的精确控制，以确保信号完整性和减少干扰。本文介绍了一种利用介电粒子进行天线动态控制的新方法。我们证明，将紧凑的全介电球形和圆柱形谐振器与领结天线集成在一起，可以在其工作频谱内创建定义良好的阻带，有效地过滤不需要的频率，而不会产生与金属元素相关的损失。此外，我们通过利用陶瓷材料的温度相关介电常数，揭示了一种突破性的热调谐机制。这种方法允许主动移动这些阻带，动态地重新配置天线的工作带宽。我们的研究结果通过5 G高频段的数值模拟验证，展示了一种简单有效的天线辐射控制方法的新范例，为智能、自适应和环境稳健的通信设备铺平了道路。

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引用次数: 0

From radiation pattern straight to antenna geometry 从辐射方向图直接到天线几何形状

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2026-01-01 Epub Date: 2025-11-19 DOI: 10.1016/j.photonics.2025.101477

Vladimir D. Burtsev, Tatyana S. Vosheva, Andrey A. Zarenin, Dmitry S. Filonov

In this work, we present a versatile approach for designing new antennas with predetermined radiation patterns through the indirect solution of the electrodynamics inverse problem. The algorithm is based on the spherical multipolar decomposition of a given radiation pattern and its correlation and decomposition by the basis of other simpler antennas. The proposed technique enables flexible adjustment of the desired far-field distribution, without directly focusing on any other parameters other than the polarization requirements of the communication channel and the spatial distribution of the objects involved in the task. In addition to detailing the algorithm for reconstructing the antenna geometry from its radiation pattern, we provide several examples of using this algorithm. The emitter topologies obtained using this method can be applied both in novel 5G Advanced and 6G communication systems, as well as integrated into existing wireless communication and power transfer lines.

在这项工作中，我们提出了一种通用的方法，通过间接解决电动力学逆问题来设计具有预定辐射方向图的新天线。该算法基于给定辐射方向图的球面多极分解及其在其他更简单天线的基础上的相关和分解。所提出的技术能够灵活地调整所需的远场分布，而不直接关注通信信道的极化要求和任务中涉及的物体的空间分布以外的任何其他参数。除了详细介绍从其辐射方向图重建天线几何形状的算法外，我们还提供了使用该算法的几个示例。利用该方法获得的发射极拓扑既可以应用于新型5G Advanced和6G通信系统，也可以集成到现有的无线通信和电力传输线路中。

引用次数: 0

Band-folding-engineered quasi-BICs in elliptical silicon nanodimers for High-FOM refractive index sensing: Design and optimization 用于高fom折射率传感的椭圆硅纳米二聚体带折叠工程准bic：设计与优化

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2026-01-01 Epub Date: 2025-11-28 DOI: 10.1016/j.photonics.2025.101488

Qi Wu, Shuo Yang, Shan Wu

In this work, a metasurface consisting of periodic arrays of asymmetric elliptical bi-silicon cylinders with out-of-plane symmetry breaking is analyzed. The designed architecture supports band-folding quasi-bound states in the continuum (QBICs) with magnetic dipole (MD) and electric quadrupole (EQ) as dominant radiative components governing the resonance. It demonstrates outstanding refractive index (RI) sensing capabilities, achieving a baseline sensitivity of 603.75

nm ∙ {RIU}^{- 1}

through its initial geometric configuration. Employing parameter space exploration, we demonstrate a 28.7 % enhancement in sensitivity (S) from baseline to 770.7

nm ∙ {RIU}^{- 1}

through strategic geometric tuning. By implementing a parameter compensation strategy during the QBIC realization process, we successfully decoupled the resonant wavelength from structural asymmetry variations, while maintaining inverse proportionality between the full-width at half-maximum (FWHM) and symmetry-breaking parameters (Δα). Through systematic adjustment of Δα, we achieved a record figure of merit (FOM) exceeding 10⁵

{RIU}^{- 1}

. This work bridges the gap between extreme field localization and spectral stability in BIC-based sensing

本文分析了具有面外对称破缺的非对称椭圆双硅圆柱周期性阵列的超表面。所设计的结构支持连续介质（qbic）中的带折叠准束缚态，磁偶极子（MD）和电四极子（EQ）作为控制共振的主要辐射分量。它展示了出色的折射率（RI）传感能力，通过其初始几何配置实现了603.75 nm∙RIU−1的基线灵敏度。通过参数空间探索，我们证明了通过战略性几何调谐，灵敏度(S)从基线提高到770.7 nm∙RIU−1，提高了28.7%。通过在QBIC实现过程中实施参数补偿策略，我们成功地将谐振波长与结构不对称变化解耦，同时保持半最大值全宽度（FWHM）与对称破缺参数之间的反比例关系（Δα）。通过系统调整Δα，我们取得了超过10 RIU−1的优异值（FOM）纪录。这项工作弥合了基于bic的传感中极端场定位和光谱稳定性之间的差距

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引用次数: 0

Drift of non-spherical optical particles driven by counter-propagating beams in a viscous medium 在粘性介质中由反传播光束驱动的非球形光学粒子的漂移

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2026-01-01 Epub Date: 2025-12-05 DOI: 10.1016/j.photonics.2025.101489

A.E. Ershov , Y.O. Mashinets , E.N. Bulgakov , D.N. Maksimov , V.S. Gerasimov

We consider spheroidal dielectric microparticles subject to radiation forces and torques induced by two linearly polarized weakly-focused counter-propagating Gaussian beams. Since the symmetry is lifted by the spheroidal shape of the particles the effects of both net radiation force and torque are taken into account. It is found that in the case of oblate spheroids there is a specific ratio of the semi-axes leading to anomalous drift of particles both in the lateral and the longitudinal direction. Such an effect results in displacement from the initial condition by distance up to

70 μ m

.

我们考虑了受两束线偏振弱聚焦反传播高斯光束引起的辐射力和力矩影响的球形介电微粒。由于粒子的球体形状提高了对称性，因此考虑了净辐射力和扭矩的影响。研究发现，在扁圆球的情况下，有一定比例的半轴导致粒子在横向和纵向上的异常漂移。这种效应导致与初始条件的位移达到70μm。

引用次数: 0

Quasi-bound states in continuum based on all-dielectric metasurface for refractive index sensing with both high sensitivity and figure of merit 基于全介电超表面的准束缚态连续介质的高灵敏度和高品质系数折射率传感

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-12-01 Epub Date: 2025-10-31 DOI: 10.1016/j.photonics.2025.101460

Boyao Li , Peiyi Lu , Jiepeng Wu, Haohan Chen, Minglei He, Xinen Wu, Yunwei Wang, Haiying Liu, Qiang Li, Lijun Wu

Quasi-bound states in the continuum (quasi-BICs) supported by all-dielectric metasurfaces can greatly enhance the interaction between light–matter due to their high quality-factor resonances, which plays an essential role in the field of refractive index sensing. Achieving high sensitivity (S) and high figure of merit (FOM) at the same time remains a difficult task. Since the overlap between the electromagnetic (EM) field and the external medium is necessary to maintain a high sensitivity, we strategically introduce the broken symmetry into the low field intensity position of the mode to minimize its impact. This decouples the tuning of S and FOM, allowing FOM to be optimized under high S. Simulations show that the metasurface supports two types of resonances in the 1887–2180 nm band, one of which is a sharp Fano resonance excited by quasi-BICs. According to the multipole decomposition and field distribution, the electric quadrupole dominates this resonance. Its sensitivity to the refractive index change can reach 865.9 nm/RIU with a FOM as high as 31294.2 RIU⁻¹. These values surpass all the numerical results reported so far. Our work not only offers a high-performance sensing platform but also proposes a novel strategy for obtaining multiple targets in quasi-BIC-based applications.

由全介质超表面支撑的连续介质中的准束缚态（Quasi-bound state, bics）由于其高质量因子共振，可以极大地增强光-物质之间的相互作用，这在折射率传感领域起着至关重要的作用。同时实现高灵敏度(S)和高质量因数（FOM）仍然是一个艰巨的任务。由于电磁场与外界介质之间的重叠是保持高灵敏度所必需的，因此我们战略性地将对称性破缺引入到模式的低场强位置，以减小其影响。仿真结果表明，该超表面在1887 ~ 2180nm波段支持两种共振类型，其中一种是由准bic激发的尖锐Fano共振。根据多极分解和场分布，电四极子占主导地位。其对折射率变化的灵敏度可达865.9 nm/RIU， FOM高达31294.2 RIU−1。这些数值超过了迄今为止报告的所有数值结果。我们的工作不仅提供了一个高性能的传感平台，而且提出了一种在准基于bic的应用中获取多目标的新策略。

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引用次数: 0

Machine learning-assisted multi-objective optimization of photonic crystal fiber SPR sensors 基于机器学习的光子晶体光纤SPR传感器多目标优化

IF 2.9 3区物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-12-01 Epub Date: 2025-11-19 DOI: 10.1016/j.photonics.2025.101478

Pengxiang Li, Hao Wang, Zhengrong Tong, Weihua Zhang, Jing Ma

This research presents a novel design framework for photonic crystal fiber surface plasmon resonance (PCF-SPR) sensors, incorporating finite element simulation, machine learning (ML), and multi-objective optimization methodologies. A dataset is produced via numerical simulations, altering essential structural parameters such as big and small hole dimensions, hole spacing, and gold film thickness. A multilayer perceptron (MLP) neural network is created as a surrogate model to swiftly and precisely forecast sensor performance parameters, such as wavelength sensitivity and figure of merit (FOM). The non-dominated sorting genetic algorithm (NSGA-II) is utilized to attain the Pareto optimal frontier, with sensitivity and FOM as dual optimization objectives. The ideal compromise option is subsequently identified with the Technique for Order of Preference by Similarity to Ideal Option (TOPSIS) approach. The optimized PCF-SPR sensor attained a peak sensitivity of 21,172.80 nm/RIU and a FOM of 100.86

{RIU}^{- 1}

, indicating significant performance improvement. This study emphasizes the amalgamation of ML with multi-objective evolutionary algorithms, confirming the practicality and benefits of merging ML with optimization algorithms for the construction of high-performance PCF-SPR sensor architectures.

本研究提出了一种新的光子晶体光纤表面等离子体共振（PCF-SPR）传感器设计框架，结合了有限元模拟、机器学习（ML）和多目标优化方法。通过数值模拟生成数据集，改变基本结构参数，如大孔和小孔尺寸、孔间距和金膜厚度。建立了多层感知器（MLP）神经网络作为替代模型，快速准确地预测传感器性能参数，如波长灵敏度和优值图（FOM）。采用非支配排序遗传算法（NSGA-II）求解Pareto最优边界，以灵敏度和FOM为双重优化目标。然后用理想选项相似偏好排序技术（TOPSIS）方法确定理想妥协选项。优化后的PCF-SPR传感器的峰值灵敏度为21,172.80 nm/RIU， FOM为100.86 RIU−1，性能得到显著提高。本研究强调了机器学习与多目标进化算法的融合，证实了机器学习与优化算法融合在高性能PCF-SPR传感器架构构建中的实用性和优势。

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引用次数: 0