Photonics and Nanostructures-Fundamentals and Applications最新文献_第10页

Disentangling bright and dark plasmonic modes in hexagonal nanoprism oligomers 六方纳米棱镜低聚体中亮、暗等离子体模式的解纠缠

IF 2.9 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-04-10 DOI: 10.1016/j.photonics.2026.101545

Elham A. Aldufeery

{"title":"Disentangling bright and dark plasmonic modes in hexagonal nanoprism oligomers","authors":"Elham A. Aldufeery","doi":"10.1016/j.photonics.2026.101545","DOIUrl":"10.1016/j.photonics.2026.101545","url":null,"abstract":"<div><div>We numerically investigate the plasmonic properties of hexagonal oligomers comprising six tip-to-tip triangular nanoprisms, comparing silver (Ag) and gold (Au) structures. By varying the interparticle gap (<span><math><mi>G</mi></math></span>) from 0 to 100 nm, we used far-field and near-field EELS spectroscopy to map the system’s bright and dark plasmonic modes. We identified a low-energy, “bright” bonding mode that is exceptionally gap-tunable, red-shifting over 1500 nm as <span><math><mi>G</mi></math></span> approaches 0 nm. Conversely, EELS revealed a high-symmetry “dark” mode that is gap-insensitive in the strong coupling regime, remaining “locked” at <span><math><mrow><mo>≈</mo><mn>2</mn><mo>.</mo><mn>49</mn><mspace></mspace><mi>eV</mi></mrow></math></span> (Ag) and <span><math><mrow><mo>≈</mo><mn>2</mn><mo>.</mo><mn>11</mn><mspace></mspace><mi>eV</mi></mrow></math></span> (Au). This dichotomy between the highly tunable bright mode and the stable dark mode results in a Fano resonance. Our study clarifies the complementary nature of far- and near-field probes and demonstrates a platform featuring both highly tunable and stable resonances.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101545"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147651056","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

Optical properties of metal halide perovskites for indoor photovoltaics 室内光伏用金属卤化物钙钛矿的光学性质

IF 2.9 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-04-02 DOI: 10.1016/j.photonics.2026.101546

Ruslan Azizov , Qinghao Song , Jiangnan Xing , Vladislav Kalinichenko , Jinlong Zhu , Maxim Kuznetsov , Dmitry Shestakov , Marina Tepliakova , Francesco Di Giacomo , Dmitry Zhirihin , Aldo Di Carlo , Aleksandra Furasova

{"title":"Optical properties of metal halide perovskites for indoor photovoltaics","authors":"Ruslan Azizov , Qinghao Song , Jiangnan Xing , Vladislav Kalinichenko , Jinlong Zhu , Maxim Kuznetsov , Dmitry Shestakov , Marina Tepliakova , Francesco Di Giacomo , Dmitry Zhirihin , Aldo Di Carlo , Aleksandra Furasova","doi":"10.1016/j.photonics.2026.101546","DOIUrl":"10.1016/j.photonics.2026.101546","url":null,"abstract":"<div><div>Lead halide perovskite solar cells exhibit excellent performances not only under full AM 1.5 G sunlight, but also in low-light environments, such as cloudy conditions or artificial light. For such applications, light management plays a crucial role, as well as the selection of perovskite composition. However, optical constants – permittivity and permeability – are not yet established for many mixed perovskites widely used for these applications. In this work, we show how perovskite composition determines its refractive indexes and extinction. Based on that, we provide a comprehensive simulation of the electric field and light absorption properties of solar cells based on different APbX<sub><strong>3</strong></sub> perovskites to evaluate their possible performance for indoor applications. The maximum efficiency of indoor perovskite solar cells was 32.2% at 2000 lux for a 4000 K LED used as a light source.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101546"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147651057","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

Centrifugal microfluidics for size-selective separation of polydisperse Mie-resonant silicon nanoparticles 多分散密共振硅纳米颗粒粒径选择性分离的离心微流控

IF 2.9 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-04-20 DOI: 10.1016/j.photonics.2026.101551

Sabina Bikmetova , Daria Sennikova , Mikhail V. Zyuzin , Dmitry Zuev

{"title":"Centrifugal microfluidics for size-selective separation of polydisperse Mie-resonant silicon nanoparticles","authors":"Sabina Bikmetova , Daria Sennikova , Mikhail V. Zyuzin , Dmitry Zuev","doi":"10.1016/j.photonics.2026.101551","DOIUrl":"10.1016/j.photonics.2026.101551","url":null,"abstract":"<div><div>Microfluidic separation, based on sedimentation in curved channels under the action of centrifugal forces, is a powerful method for sorting nanoparticles. However, most studies demonstrate performance on model monodisperse polystyrene spheres. In this work, we implement a centrifugal microfluidic chip for a centrifuge, the parameters of which are calculated based on an existing theoretical model, to solve the practical problem of separating colloidal solutions of silicon nanoparticles (Si NPs) containing Mie-resonant Si NPs synthesized by laser ablation in liquid. We demonstrate efficient separation of the ablated colloidal solution of Si NPs (size range from 50 nm to 450 μm), leading to a significant narrowing of the nanoparticle size distribution in the outlet fractions. A key result is the successful separation of Si NPs possessing strong Mie-resonances in the visible spectrum, corresponding to diameters of approximately 120–240 nm. Thus, the presented approach demonstrates the potential of centrifugal microfluidics as an effective method for separation of polydisperse nanomaterials, in particular, Si NPs with resonant optical properties.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101551"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147740904","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

Broadband tunable perfect absorber based on dielectric/Vanadium dioxide multilayer films in the mid-infrared frequency 中红外波段基于介质/二氧化钒多层膜的宽带可调谐完美吸收体

IF 3.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-06-20 DOI: 10.1016/j.photonics.2026.101579

Siddhartha Sahu, Gangadhar Behera

{"title":"Broadband tunable perfect absorber based on dielectric/Vanadium dioxide multilayer films in the mid-infrared frequency","authors":"Siddhartha Sahu, Gangadhar Behera","doi":"10.1016/j.photonics.2026.101579","DOIUrl":"10.1016/j.photonics.2026.101579","url":null,"abstract":"<div><div>We present a lithography-free, wide-angle, polarization-insensitive, and tunable broadband absorber based on a multilayer thin-film architecture composed of five pairs of vanadium dioxide (VO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span>) and dielectric layers deposited on a glass substrate. The optical performance of the proposed structure is analyzed using the transfer matrix method (TMM). The numerical results demonstrate that, when VO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> is in its metallic phase, the absorptivity exceeds 99% under normal incidence over the wavelength range of <span><math><mrow><mn>4</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> to <span><math><mrow><mn>15</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>. In contrast, nearly zero absorption is obtained when VO<span><math><msub><mrow></mrow><mrow><mn>2</mn></mrow></msub></math></span> transitions to its dielectric phase, highlighting the strong phase-dependent tunability of the design. The influence of incident angle and polarization on the absorption response is systematically investigated, confirming robust wide-angle operation and polarization-insensitive behaviour. Field distribution analyses of the electric and magnetic components at representative wavelengths reveal that the enhanced absorption primarily originates from constructive interference and resonant electromagnetic confinement within the multilayer stack. Owing to its excellent tunable mid-infrared absorption characteristics, the proposed structure is a promising candidate for thermovoltaics and infrared imaging as well as other applications operating in the visible–infrared spectral regime.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101579"},"PeriodicalIF":3.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565178","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

Thermal transport in honeycomb photonic crystal fibers: An analytical approach for high-power photonics 蜂窝光子晶体光纤中的热输运：高功率光子学的分析方法

IF 3.5 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-06-17 DOI: 10.1016/j.photonics.2026.101577

Maryam Karimi

{"title":"Thermal transport in honeycomb photonic crystal fibers: An analytical approach for high-power photonics","authors":"Maryam Karimi","doi":"10.1016/j.photonics.2026.101577","DOIUrl":"10.1016/j.photonics.2026.101577","url":null,"abstract":"<div><div>This paper presents an analytical model for evaluating the effective thermal conductivity of honeycomb photonic crystal fibers (PCFs) used in high-power photonic applications. The model extends previous one-dimensional approaches by incorporating two-dimensional heat diffusion and equivalent cylindrical thermal resistance, leading to improved physical representation of radial heat transport. The formulation is based on a thermal resistance network that enables closed-form calculation of layer-wise and global conductivity. A quantitative error analysis is performed to assess the impact of neglecting unit-cell rotational effects. Based on orientation-dependent conductivity data from previous studies, the maximum deviation at the unit-cell level is 0.02, which propagates to a global deviation of less than 0.002 for structures with five or more lattice layers. The results show that the effective thermal conductivity increases with the number of layers and converges beyond approximately 6–10 layers, indicating a practical structural optimization range. The proposed model provides a computationally efficient tool for thermal analysis and design of PCFs operating under high thermal loads.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101577"},"PeriodicalIF":3.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565179","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

Design of a broadband achromatic metalens for near-diffraction-limited focusing of long-wavelength infrared waves 用于长波红外近衍射限制聚焦的宽带消色差超透镜设计

IF 2.9 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-04-27 DOI: 10.1016/j.photonics.2026.101554

Jinyuan Yang, Junqiao Wang, Mengsha Xue, Jiangnan He, Yahua Xiang, Chang Zhao

{"title":"Design of a broadband achromatic metalens for near-diffraction-limited focusing of long-wavelength infrared waves","authors":"Jinyuan Yang, Junqiao Wang, Mengsha Xue, Jiangnan He, Yahua Xiang, Chang Zhao","doi":"10.1016/j.photonics.2026.101554","DOIUrl":"10.1016/j.photonics.2026.101554","url":null,"abstract":"<div><div>Metalens offer distinct advantages over traditional optical lenses in enhancing imaging performance, reducing system size, and optimizing optical system design. This paper presents the design of an achromatic metalens based on the transmission phase principle, which achieves near-diffraction-limited focusing in the 10.75–11.5 μm wavelength range and attains an average focusing efficiency of approximately 40.88% at the focal plane across the broadband range. The design employs zinc selenide (ZnSe) nano-elliptical cylindrical structures, characterized by high transmission, low optical loss, and moderate refractive index, to construct a detailed phase and transmission database. A particle swarm optimization (PSO) algorithm, enhanced with mutation operations, was then applied to obtain the actual phase configuration of the metalens, closely matching the ideal phase. The proposed achromatic metalens is expected to contribute to the development of more efficient and multifunctional infrared optical systems, with potential applications in thermal imaging, environmental monitoring, and biomedical diagnostics.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101554"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147798504","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 comprehensive framework for optimizing dual plasmonic LSPR-PCF sensors: The role of displacement angle 优化双等离子体LSPR-PCF传感器的综合框架：位移角的作用

IF 2.9 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-03-28 DOI: 10.1016/j.photonics.2026.101544

Ahmed Mujtaba Al Naser, Md. Jahid Hasan

{"title":"A comprehensive framework for optimizing dual plasmonic LSPR-PCF sensors: The role of displacement angle","authors":"Ahmed Mujtaba Al Naser, Md. Jahid Hasan","doi":"10.1016/j.photonics.2026.101544","DOIUrl":"10.1016/j.photonics.2026.101544","url":null,"abstract":"<div><div>The integration of Localized Surface Plasmons in Photonic Crystal Fibers has led to the emergence of intriguing sensor designs with advantageous properties. Inspection of such sensor designs reveals an unexplored question: whether the Displacement Angles between plasmonic layers affect the overall performance. This comparative analysis aims to comprehensively report the influence of Displacement Angle between dual plasmonic layers in LSPR-PCF sensors, whilst retaining the same sensor cross-section. The analysis has been done for four discrete angles of 0°, 60°, 120° and 180°. Each angular variant has been optimized individually through layer thickness and airhole diameters; eventually, the best angular variant has been deduced from a novel parameter, the Sensor Performance Mark (SPM). Gold (metal) has been used for the 1st layer and AZO (semiconductor) for the 2nd layer. It is observed that the variation of Displacement Angle can significantly alter the core-loss trajectory as well as the interaction of the surface plasmons with the analyte to be sensed; thus, leading to the difference in performances in respective variations. We anticipate that in the future, more sophisticated fiber optic sensors will be optimized through the Displacement Angle approach, followed by the conventional optimization procedures.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101544"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147651059","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

Nanodiode-enabled frequency-reconfigurable 4 × 1 cross-array THz antenna for 6 G networks and dermatological cancer detection 纳米二极管使能频率可重构4 × 1交叉阵列太赫兹天线，用于6 G网络和皮肤病癌症检测

IF 2.9 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-05-14 DOI: 10.1016/j.photonics.2026.101563

Masoud Maghsoudi , Changiz Ghobadi , Javad Nourinia , Yousef Roosta , Majid Shokri

{"title":"Nanodiode-enabled frequency-reconfigurable 4 × 1 cross-array THz antenna for 6 G networks and dermatological cancer detection","authors":"Masoud Maghsoudi , Changiz Ghobadi , Javad Nourinia , Yousef Roosta , Majid Shokri","doi":"10.1016/j.photonics.2026.101563","DOIUrl":"10.1016/j.photonics.2026.101563","url":null,"abstract":"<div><div>A compact frequency-reconfigurable terahertz (THz) antenna has been developed for short-range sixth-generation (6 G) wireless links and terahertz-based dermatological cancer imaging. The proposed design features a nanodiode-enabled dipole element arranged in a 4 × 1 cross-array configuration, with frequency reconfiguration achieved by electrically switching the impedance state of an embedded nanodiode in the feed structure. This switching mechanism alters the effective current distribution and electrical length of the antenna, enabling dual-band operation at 4 THz for shallow-penetration sensing and short-range communication, and at 6 THz for high-resolution imaging of superficial skin lesions, all without the need for multiple radiators or complex biasing networks. A compact power-divider network ensures uniform excitation of the cross-array while preserving omnidirectional radiation characteristics. Full-wave electromagnetic simulations indicate stable impedance matching, high radiation efficiency, and consistent radiation performance across both operating states. This proposed antenna provides a compact and scalable solution for frequency-reconfigurable THz systems, with potential applications in 6 G device-to-device communication and the early detection of melanoma. It also lays the groundwork for future experimental validation as THz fabrication and measurement technologies continue to advance.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101563"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148167529","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

Broadband multichannel spin-decoupled metasurface based on dual-phase-change materials 基于双相变材料的宽带多通道自旋解耦超表面

IF 2.9 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-05-22 DOI: 10.1016/j.photonics.2026.101570

Zhurong Zheng , Rongquan Chen , Rongfeng Zheng , Qi Tan

{"title":"Broadband multichannel spin-decoupled metasurface based on dual-phase-change materials","authors":"Zhurong Zheng , Rongquan Chen , Rongfeng Zheng , Qi Tan","doi":"10.1016/j.photonics.2026.101570","DOIUrl":"10.1016/j.photonics.2026.101570","url":null,"abstract":"<div><div>This paper proposes a broadband multichannel spin-decoupled metasurface based on dual-phase-change materials (photosensitive silicon and VO<sub>2</sub>) to overcome the limitations of traditional metasurfaces. By leveraging a hybrid control mechanism that combines the propagation phase and geometric phase, independent wavefront manipulation of left circular polarization and right circular polarization waves is achieved under different external excitations. The proposed structure achieves focusing and vortex beam generation in the 1.0–1.3 THz band, and anomalous reflection in the 1.1–1.3 THz band, demonstrating multistate reconfigurable functionality. When both phase-change materials are in the metallic state, the structure functions as a focusing reflector capable of producing distinct focal lengths for dual circularly polarized waves; when the photosensitive silicon is in the insulating state and VO<sub>2</sub> is in the metallic state, vortex beams with topological charges of ±1 are generated; and when both materials are in the insulating state, anomalous reflection with different reflection angles is realized. Furthermore, each functional configuration can independently project clear holographic images.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101570"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148167530","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

Plasmonic mode evolution in rotated aluminum nanorod chains: A symmetry-breaking analysis 旋转铝纳米棒链中的等离子体模式演化：对称断裂分析

IF 2.9 3区物理与天体物理

Photonics and Nanostructures-Fundamentals and Applications Pub Date : 2026-04-01 Epub Date: 2026-05-14 DOI: 10.1016/j.photonics.2026.101562

Elham A. Aldufeery

{"title":"Plasmonic mode evolution in rotated aluminum nanorod chains: A symmetry-breaking analysis","authors":"Elham A. Aldufeery","doi":"10.1016/j.photonics.2026.101562","DOIUrl":"10.1016/j.photonics.2026.101562","url":null,"abstract":"<div><div>The collective optical response of plasmonic nano-assemblies is fundamentally governed by the interplay between near-field coupling, geometric configuration, and the intrinsic dielectric properties of the constituent materials. This study presents a comprehensive computational analysis of the optical cross-sections (absorption, scattering, extinction) and near-field properties of linear chains of 10 aluminum nanorods with fixed diameter <span><math><mrow><mi>D</mi><mo>=</mo><mn>20</mn><mspace></mspace><mi>nm</mi></mrow></math></span> and length <span><math><mrow><mi>L</mi><mo>=</mo><mn>100</mn><mspace></mspace><mi>nm</mi></mrow></math></span>. By systematically deconstructing the spectral response as a function of two distinct rotational schemes — an inter-element azimuthal rotation and a global orientational rotation — we elucidate the evolution and tunability of plasmonic modes. Analysis of the surface charge density provides direct visualization of the underlying physics, confirming the nature of collective bonding modes and the mechanism by which internal symmetry breaking geometrically activates otherwise inaccessible individual-rod longitudinal modes, and contrasting it with the simple projection mechanism of external rotation. We demonstrate that while inter-particle separation dictates the foundational energy of the hybridized modes, inter-element rotation acts as a continuous geometric modulator of the accessible mode structure. Throughout this analysis, it is established that absorption is the dominant energy dissipation channel, a direct consequence of the high intrinsic ohmic losses in aluminum.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101562"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147956909","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