Plasmonics最新文献_第3页

Highly Sensitive and Self-Calibrating Fiber Optic SPR Methane Sensor Based on Graphene–MoS2 Heterostructure 基于石墨烯- mos2异质结构的高灵敏度自校准光纤SPR甲烷传感器

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-29 DOI: 10.1007/s11468-025-03046-9

Pengxiao Xu, Minghui Huo, Xiaokang Wang, Longyu Xu, Jingchao Bao, Aolin Hou, Yundong Liu, Xiaojian Meng, Kun Yu, Yufang Liu

{"title":"Highly Sensitive and Self-Calibrating Fiber Optic SPR Methane Sensor Based on Graphene–MoS2 Heterostructure","authors":"Pengxiao Xu, Minghui Huo, Xiaokang Wang, Longyu Xu, Jingchao Bao, Aolin Hou, Yundong Liu, Xiaojian Meng, Kun Yu, Yufang Liu","doi":"10.1007/s11468-025-03046-9","DOIUrl":"10.1007/s11468-025-03046-9","url":null,"abstract":"<div><p>Methane, a highly flammable and explosive gas, poses significant safety risks and challenges for industrial applications. A highly sensitive sensor based on surface plasmon resonance within a photonic crystal fiber is presented and fully analyzed. This sensor measures methane concentration while providing self-calibration. The photonic crystal fiber features a D-type structure with grooves, where composite two-dimensional material film and gold films are deposited. Additionally, a methane-sensitive layer containing cryptophane-A is coated on the surface of the D-type structure. The finite element method is utilized to analyze and compare the coating of different two-dimensional materials (graphene, MoS<sub>2</sub>, and graphene–MoS<sub>2</sub>) on the simulation analysis of sensor sensitivity. The use of graphene–MoS<sub>2</sub> composite two-dimensional material not only enhances the sensing performance but also excites the double-peak effect. This double-peak effect enables the methane sensor to measure at different wavelengths, with the primary and secondary peaks calibrated against each other to improve the sensor's accuracy. The results show that the surface plasmon resonance based on photonic crystal fiber sensor with graphene–MoS<sub>2</sub> composite membrane has better sensing performance. The maximum wavelength sensitivity and average wavelength sensitivity reached 80 and 63.4 nm/%, respectively, over the range of methane concentrations from 0.5 to 3.5%. These properties are significantly better than those of recently reported methane sensors. Therefore, the sensor has excellent application prospects in miniature methane detection field.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"6003 - 6015"},"PeriodicalIF":4.3,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Numerical Investigation of Selective Near-infrared Fluorescent Enhancement Based on Dual-Band Plasmonic Metasurfaces with Truncated Pyramids 截断金字塔双波段等离子体超表面选择性近红外荧光增强的数值研究

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-29 DOI: 10.1007/s11468-025-03056-7

Thu Trang Hoang, Xuan Bach Nguyen, Huu Tu Nguyen, Thanh Son Pham, Quang Minh Ngo

{"title":"Numerical Investigation of Selective Near-infrared Fluorescent Enhancement Based on Dual-Band Plasmonic Metasurfaces with Truncated Pyramids","authors":"Thu Trang Hoang, Xuan Bach Nguyen, Huu Tu Nguyen, Thanh Son Pham, Quang Minh Ngo","doi":"10.1007/s11468-025-03056-7","DOIUrl":"10.1007/s11468-025-03056-7","url":null,"abstract":"<div><p>This paper presents a numerical investigation of near-infrared plasmonic metasurfaces formed by periodic arrays of subwavelength truncated pyramids of stacks of silver (Ag) and silica (SiO<sub>2</sub>) nanosquares placed on an Ag layer (acting as a reflector). By controlling the difference between the two base lengths of the truncated pyramid, it is possible to design a plasmonic metasurface that generates two distinct resonances. Simulation results using the finite-difference time-domain (FDTD) method reveal that these two resonances are generated by coupling between the localized modes of Ag nanosquares and the propagative surface plasmon mode on the Ag reflecting layer. Looking at the field distribution at the resonances, the strong confinement of incident light localized inside the air-SiO<sub>2</sub> spacer-layer, which has extremely low reflection (close to 0%), corresponded to the absorption of up to 100% and a high quality-factor (<i>Q</i>-factor) of ~ 180. Operating in the near-infrared range, the proposed plasmonic metasurface has low Ohmic loss, it can produce the <i>E</i>-field enhancements of ~ 65 and ~ 400 times at wavelengths of ~ 1372.0 and ~ 1499.0 nm, respectively, and high directivity of ~ 1296. The proposed plasmonic metasurface holds potential applications in fields such as cell imaging, biomarkers for disease diagnostics, and environmental monitoring.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"6017 - 6025"},"PeriodicalIF":4.3,"publicationDate":"2025-05-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923155","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Graphene-Based Ultra-Wideband Polarization-Insensitive Absorber for Terahertz Applications 基于石墨烯的太赫兹应用超宽带极化不敏感吸收体的设计

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-23 DOI: 10.1007/s11468-025-03043-y

Subbarao Genikala, Anumoy Ghosh, Pratik Mondal, Bappadittya Roy

{"title":"Design of a Graphene-Based Ultra-Wideband Polarization-Insensitive Absorber for Terahertz Applications","authors":"Subbarao Genikala, Anumoy Ghosh, Pratik Mondal, Bappadittya Roy","doi":"10.1007/s11468-025-03043-y","DOIUrl":"10.1007/s11468-025-03043-y","url":null,"abstract":"<div><p>A graphene-based ultra-wideband terahertz absorber with polarization independent behavior is proposed and analyzed numerically. The proposed unit-cell structure consists of patterned graphene surface and a graphene ground plane separated by a silicon dioxide (SiO<sub>2</sub>) layer. The simulated results exhibit that the proposed absorber structure can attain over 90% absorptivity from 0.1 to 20 THz with a fractional bandwidth of 198% while fixing the relaxation time and Fermi energy level of graphene as 0.03 ps and 1 eV, respectively. The structure gives exactly the same absorptivity response for all polarization angles rendering it completely polarization insensitive. It maintains above 80% absorptivity until 50° oblique incidence angle for both TE and TM modes. The shielding effectiveness of the proposed absorber is above 61 dB. The polarization conversion ratio of the structure is 0.12 which confirms that it does not act as a polarization converter. The absorption bandwidth can be dynamically tuned by managing the Fermi energy level and relaxation time of graphene without modifying the structure dimensions. To facilitate structure analysis, an equivalent circuit model based on transmission line theory is introduced, and the reliability of the suggested model is validated using full-wave simulation. The proposed structure is compared with similar graphene based absorbers, and it is revealed that the proposed structure has superior performance suitable for EMI/EMC and stealth applications at terahertz range.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"5991 - 6002"},"PeriodicalIF":4.3,"publicationDate":"2025-05-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923232","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

High-Quality Plasmonic Modes with Bloch Surface Waves Modulated by Metal Stripes 金属条纹调制布洛赫表面波的高质量等离子体模式

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-21 DOI: 10.1007/s11468-025-03030-3

He Chen, Zhe Zhang, Liqin Yue, Dengyun Lei, Dong Yang, Yongzhi Hao, Da Teng

{"title":"High-Quality Plasmonic Modes with Bloch Surface Waves Modulated by Metal Stripes","authors":"He Chen, Zhe Zhang, Liqin Yue, Dengyun Lei, Dong Yang, Yongzhi Hao, Da Teng","doi":"10.1007/s11468-025-03030-3","DOIUrl":"10.1007/s11468-025-03030-3","url":null,"abstract":"<div><p>In recent years, surface plasmons (SPs) have been intensively studied and found to be useful for sensing and waveguide applications. The subwavelength confinement of SP modes has spurred the exploration of diverse plasmonic structures. Nevertheless, the inherent ohmic losses associated with metals critically restrict the propagation distances of SPs, thereby limiting device applicability. In this study, we propose a plasmonic waveguide by integrating the periodic multilayer structures supporting Bloch surface waves with metallic thin stripes. The modal characteristics at the wavelength of 1550 nm are analyzed using the finite element method. The results indicate that this structure supports plasmon modes characterized by low propagation losses and reduced mode field areas. Specifically, the proposed waveguide achieves mode field areas on the order of 10<sup>−4</sup><i>λ</i><sup>2</sup>, propagation distances over 100 μm as well as high-quality factors exceeding 3000. These findings provide a promising approach for the design and realization of highly integrated plasmonic devices.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"5957 - 5965"},"PeriodicalIF":4.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923264","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Trimodal 2D Metasurface Biosensor with Bayesian Regression for Ultra-Sensitive Cancer Biomarker Detection 基于贝叶斯回归的三模态二维超表面生物传感器用于超灵敏癌症生物标志物检测

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-21 DOI: 10.1007/s11468-025-03033-0

Kapil Aggarwal, Jacob Wekalao, Amuthakkannan Rajakannu

{"title":"A Trimodal 2D Metasurface Biosensor with Bayesian Regression for Ultra-Sensitive Cancer Biomarker Detection","authors":"Kapil Aggarwal, Jacob Wekalao, Amuthakkannan Rajakannu","doi":"10.1007/s11468-025-03033-0","DOIUrl":"10.1007/s11468-025-03033-0","url":null,"abstract":"<div><p>In this study, we present the design, simulation, and characterization of a biosensor architecture leveraging a trimodal integration of MXene, black phosphorus, and graphene for the enhanced detection of neoplastic biomarkers. The sensor configuration consists of MXene-functionalized rectangular resonators coupled with black phosphorus-augmented circular ring structures, all integrated atop a graphene-modified substrate. The entire device was simulated on a silicon dioxide platform using standard photolithographic techniques. Electromagnetic performance, evaluated through finite element method (FEM) simulations (COMSOL Multiphysics), demonstrates outstanding sensing capabilities, with the sensor achieving an exceptional sensitivity of 2000 GHzRIU<sup>−1</sup> within the clinically relevant refractive index range of 1.36–1.401.A series of parametric studies were conducted to investigate the effects of key factors, including graphene chemical potential (GCP), incident electromagnetic wave angle, rectangular resonator dimensions, and circular ring radius on the transmission spectra. The sensor exhibits a strong linear relationship between resonance frequency shift and refractive index variation (R<sup>2</sup> = 98.918%). Moreover, Bayesian regression modelling applied to variations in GCP and incident angle yielded high predictive accuracy, with coefficients of determination of approximately 90% and 91%, respectively.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"5977 - 5990"},"PeriodicalIF":4.3,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923250","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Performance of a Novel Surface Plasmon Resonance Nanostructure Based on PtSe2 and Graphene Thin Films 基于PtSe2和石墨烯薄膜的新型表面等离子体共振纳米结构的性能

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-21 DOI: 10.1007/s11468-025-03026-z

Mahasen H. Albelbeisi, Malek G. Daher, Sofyan A. Taya, Yogesh Sharma, Hussein A. Elsayed, Mahmood Basil A. AL-Rawi, Ahmed Zohier Ahmed Elhendi, Wail Al Zoubi, Mostafa R. Abukhadra, Ahmed Mehaney

引用次数: 0

Photonic Crystal Fiber-Based Plasmonic Biosensor for Cancer Cell Detection 用于癌细胞检测的光子晶体光纤等离子体生物传感器

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-19 DOI: 10.1007/s11468-025-02993-7

Arun Kumar Shukla, Ratneshwar Kumar Ratnesh, Dhruva Chaudhary

{"title":"Photonic Crystal Fiber-Based Plasmonic Biosensor for Cancer Cell Detection","authors":"Arun Kumar Shukla, Ratneshwar Kumar Ratnesh, Dhruva Chaudhary","doi":"10.1007/s11468-025-02993-7","DOIUrl":"10.1007/s11468-025-02993-7","url":null,"abstract":"<div><p>A highly sensitive surface plasmon resonance (SPR)-based photonic crystal fiber (PCF) sensor is proposed for advanced biosensing applications. Designed to precisely distinguish the sensitivity peaks of different analytes, the sensor’s performance has been extensively evaluated using COMSOL Multiphysics software with the finite volume finite element method (FVFEM). Noble metals such as gold, silver, tin, and nickel are employed for SPR excitation due to their excellent chemical stability and inertness. To further enhance the SPR effect, the integration of graphene and other 2D nanomaterials has been explored. These materials offer remarkable electrical, optical, and surface properties, including high surface area and strong light–matter interactions, making them ideal for improving sensor sensitivity and selectivity. Recent studies also highlight the growing importance of 2D nanomaterials in enhancing SPR-based biosensing, particularly in biomedical applications. In this study, silver and tin were selected along with silica, and their sensor responses were compared. The sensor features symmetrically placed air holes and an analyte space in the outer region for easy sample injection. Simulation results indicate that the tin-based design performs best within a refractive index range of 1.33 to 1.38, while the silver-based design is optimal between 1.35 and 1.4. Both designs achieve a wavelength sensitivity of 5000 nm/RIU for X-polarization core mode with a resolution of 2 × 10<sup>−6</sup> RIU. The maximum amplitude sensitivity recorded was 1313.47 RIU<sup>−1</sup> for silver and 1130 RIU<sup>−1</sup> for tin. Biocompatible plasmonic sensors are gaining attention due to their potential in biomedical detection, including proteins, DNA, and cancer markers. The proposed sensor is designed with future applications in mind, particularly for cancer cell detection and monitoring disease progression. In the future, such biosensors could enable real-time monitoring of cancer stages, improving early diagnosis and treatment strategies.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"5945 - 5956"},"PeriodicalIF":4.3,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923243","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

High-Performance Rhenium Disulfide-Based SPR Sensor for Detection of Adrenal Gland (PC12) Cells in Biomedical Applications 基于高性能二硫化铼的SPR传感器用于检测肾上腺（PC12）细胞在生物医学中的应用

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-16 DOI: 10.1007/s11468-025-03009-0

Mannava Durga Phani, Vasimalla Yesudasu, Vyoma Singh, S. R. Srither, Balaji Ramachandran, Santosh Kumar

{"title":"High-Performance Rhenium Disulfide-Based SPR Sensor for Detection of Adrenal Gland (PC12) Cells in Biomedical Applications","authors":"Mannava Durga Phani, Vasimalla Yesudasu, Vyoma Singh, S. R. Srither, Balaji Ramachandran, Santosh Kumar","doi":"10.1007/s11468-025-03009-0","DOIUrl":"10.1007/s11468-025-03009-0","url":null,"abstract":"<div><p>This work presents a simulation design of a high-performance surface plasmon resonance (SPR) sensor with a novel structure for sensing the adrenal gland (PC12) cells utilizing a nanostructure from rhenium disulfide (ReS₂). The sensor is based on detecting the refractive index (RI) variation of the sensing medium, which ranges from 1.381 to 1.395 in order to mimic diverse biological conditions. The sensor is fabricated in the Kretschmann geometry and consists of FK51A glass, an Ag layer, and a ReS₂ film. Other 2D materials like black phosphorus (BP), graphene, molybdenum disulfide (MoS₂), and tungsten disulfide (WS₂) are incorporated to further enhance its sensing properties. Reflectance is simulated and used to calculate key sensing parameters such as sensitivity, quality factor (QF), and accuracy of detection through the transfer matrix method. The optimized structure has the highest sensitivity of 288.571°/RIU, QF of 237.857 RIU⁻<sup>1</sup>, and detection precision of 3.49, which is much better than of typical SPR sensors. The outcomes express the huge potentiality of ReS₂-based SPR sensors in biomedical applications, such as in the fields of neurobiology research and disease diagnosis.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"5929 - 5943"},"PeriodicalIF":4.3,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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 Analysis Study Employing Laser Ablation in Gold Colloidal at Different Numbers of Laser Pulses 不同脉冲数激光烧蚀金胶体的分析研究

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-15 DOI: 10.1007/s11468-025-02998-2

Evan T. Salim, Rana O. Mahdi, Doaa Mahmoud, Subash C. B. Gopinath, Forat H. Alsultany

{"title":"An Analysis Study Employing Laser Ablation in Gold Colloidal at Different Numbers of Laser Pulses","authors":"Evan T. Salim, Rana O. Mahdi, Doaa Mahmoud, Subash C. B. Gopinath, Forat H. Alsultany","doi":"10.1007/s11468-025-02998-2","DOIUrl":"10.1007/s11468-025-02998-2","url":null,"abstract":"<div><p>This study investigated the influence of laser pulse count on the properties of Au@WO₃ core–shell nanoparticles synthesized via pulsed laser ablation in liquid (PLAL). A 1064-nm Nd:YAG laser with a fluence of 19.10 J/cm<sup>2</sup> was employed to fabricate the nanostructures using varying numbers of laser pulses (200–1200). The optical absorption spectra revealed two distinct peaks attributed to the surface plasmon resonance of Au and the absorption edge of WO₃, with a gradual red shift in the latter. Furthermore, a corresponding decrease in the optical band gap from 3.20 to 3.00 eV was observed with increasing pulse count. Photoluminescence analysis showed enhanced emission intensity and red-shifted peaks, suggesting an increase in shell thickness and improved excitonic activity. XRD confirmed the formation of monoclinic WO₃ and embedded Au cores, while Raman spectroscopy further validated the vibrational modes of the WO₃ shell. FE-SEM and TEM imaging demonstrated an increase in both particle size and shell thickness with higher pulse counts, ranging from 51 to 95 nm. EDX analysis revealed a progressive increase in the weight percentage of tungsten and oxygen atoms, supporting the formation of a thicker WO₃ shell. Overall, the results demonstrated that laser pulse control in PLAL synthesis offered a tunable method for engineering the structural and optical properties of Au@WO₃ core–shell nanoparticles for diverse applications.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"5905 - 5928"},"PeriodicalIF":4.3,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Surface Plasmon Resonance in Metal Nanoshells with Air-Core: Computational Study Using DDA 空气核金属纳米壳表面等离子体共振：DDA计算研究

IF 4.3 4区物理与天体物理

Plasmonics Pub Date : 2025-05-14 DOI: 10.1007/s11468-025-02959-9

Richa Sharma, R. P. Sharma

{"title":"Surface Plasmon Resonance in Metal Nanoshells with Air-Core: Computational Study Using DDA","authors":"Richa Sharma, R. P. Sharma","doi":"10.1007/s11468-025-02959-9","DOIUrl":"10.1007/s11468-025-02959-9","url":null,"abstract":"<div><p>Metallic nanoshells with air cores exhibit tunable plasmonic properties across the visible to near-infrared spectrum, making them highly relevant for applications in sensing, photothermal therapy, and optoelectronics. The surface plasmon resonance (SPR) peak of a 15 nm Au nanosphere in a medium with a refractive index of 1.54 appears at 545 nm, whereas for an Au nanoshell of the same size, it shifts to 805 nm (near-IR). This study systematically investigates the effects of shell material, shell thickness (S.T.), surrounding medium, and size parameters on the extinction spectra of nanoshells using both a quasi-static dipole model and a numerical approach based on the Discrete Dipole Approximation (DDA). Our results demonstrate that reducing S.T. leads to a redshift in the plasmon resonance, while increasing the refractive index of the surrounding medium significantly enhances the localized electric field intensity. The calculated figure of merit (FoM) values of 2.0 for the nanoshell and 1.33 for the nanosphere highlight the superior sensitivity of nanoshells, making them more effective for sensing applications. The numerical results are validated through analytical calculations, reinforcing the robustness of the DDA method in modeling nanoscale plasmonic behavior. This work provides deeper insights into the tunability of plasmonic nanoshells, contributing to the optimization of nanostructured materials for advanced optical and sensing applications.</p></div>","PeriodicalId":736,"journal":{"name":"Plasmonics","volume":"20 8","pages":"5897 - 5904"},"PeriodicalIF":4.3,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144923150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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