Photonics and Nanostructures-Fundamentals and Applications最新文献

{"title":"Terahertz absorber with high sensitivity in triple bands based on AlCuFe","authors":"Xinran Mao ,&nbsp;Hongyu Li ,&nbsp;Wen Gao ,&nbsp;Mengsi Liu ,&nbsp;Boxun Li","doi":"10.1016/j.photonics.2026.101566","DOIUrl":"10.1016/j.photonics.2026.101566","url":null,"abstract":"<div><div>Based on Dirac semimetal AlCuFe, a triple-band tunable terahertz absorber is proposed herein to reconcile the demands for high detection performance and practical applicability. Within the operational frequency range of 5 THz to 9 THz, three resonant absorption peaks are exhibited by the absorber, and an average absorption rate exceeding 98.4% is achieved. Using the finite element method via CST simulation technology was utilized to study the electromagnetic field distribution at the frequency of resonance. Combined with the impedance matching principle, the physical mechanism underlying the perfect absorption of the absorber has been qualitatively interpreted. Moreover, the effects of unit structure dimensions, BDS Fermi level, and environmental refractive index on the absorption rate were investigated. Its refractive index sensitivity can reach up to 4455 GHz/RIU, and the quality factor (Q - value) can reach a maximum value of 123.66, demonstrating excellent perturbation recognition ability. It exhibits remarkable application potential in scenarios where the capture of weak terahertz-band signals is required, such as medical detection and environmental monitoring. In addition, this absorber features a simple structural design, which is not only easy to fabricate but also has a certain tolerance for manufacturing errors, effectively enhancing its feasibility in actual production and application.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101566"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147991179","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}

{"title":"A compact multi-wavelength isolator using effective epsilon-near-zero and Hall regions","authors":"Zahra Chamani ,&nbsp;Abolghasem Zeidaabadi Nezhad ,&nbsp;Mahyar Dehdast ,&nbsp;Zaker Hossein Firouzeh","doi":"10.1016/j.photonics.2026.101571","DOIUrl":"10.1016/j.photonics.2026.101571","url":null,"abstract":"<div><div>Optical isolators play a crucial role in contemporary photonic systems. They ensure unidirectional light transmission and suppress back reflections to stabilize sources. In this study, a compact multi-wavelength Hall-based isolator operating in the mid-infrared (Mid-IR) regime is introduced. It uses the effective epsilon-near-zero (ENZ) and Hall regions of magnetized indium arsenide (InAs) embedded in a photonic crystal. Under transverse magnetic (TM) excitation in the Voigt geometry, this structure breaks time-reversal and mirror symmetries, achieving strong spectral nonreciprocity. The structure supports three distinct isolation wavelengths. One robust isolation point appears in the Hall transparency (HT) region, along with two in the conventional transparency (CT) region. These regions are separated by nearly <span><math><mrow><mn>4</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>, enabling dual-region and multi-wavelength operation. The device also exhibits dual-direction isolation, where different wavelengths prefer opposite transmission directions. Furthermore, the structure naturally functions as a four-port optical circulator. The ENZ-assisted mechanism provides spectral tunability by adjusting the carrier concentration or selecting other ENZ-capable semiconductors. Combining Hall-based operation, high isolation, compactness, tunability, and multi-wavelength behavior, the proposed platform offers a promising solution for next-generation Mid-IR nonreciprocal photonic devices.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101571"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147991182","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}

{"title":"Generation of optical orbital angular momentum via cooperative bragg diffraction and quasi-phase matching","authors":"Yuntao Mo ,&nbsp;Dan Wei ,&nbsp;Xinyu Liu ,&nbsp;Dunzhao Wei","doi":"10.1016/j.photonics.2026.101542","DOIUrl":"10.1016/j.photonics.2026.101542","url":null,"abstract":"<div><div>Three-dimensional (3D) nonlinear photonic crystals (NPC) enable the direct nonlinear generation and manipulation of orbital angular momentum (OAM) modes, but their nonlinear conversion efficiency is still limited by the structural dimension caused by the time-consuming fabrication process, hampering its application in detection of infrared OAM states and the demonstration of OAM entanglement. In this work, we present an integrated scheme for efficient generation of second-harmonic (SH) OAM beams, achieved through the synergistic interplay between quasi-phase matching and linear Bragg diffraction in a one-dimensional NPC, where 3D fork gratings are inscribed into 1D NPCs via femtosecond laser writing (FLW) for the first time. Experiments results show that increasing the layer count of the gratings improves both the diffraction efficiency and the angular selectivity of the SH beams. The nonlinear conversion efficiency reaches the order of 10⁻² W⁻¹. Additionally, cavity-enhanced SH OAM generation is also demonstrated by incorporating the FLW-engineered NPC into a conventional solid-state laser, verifying the compatibility between 3D diffractive grating with intracavity resonant operation. This study provides a new route for the generation and control of nonlinear OAM beams, which can be applied to detection of OAM states in the infrared band and realization of wavelength-tunable OAM source.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101542"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147651054","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}

{"title":"Heterogeneous integration of blue light sources with silicon nitride photonic chips","authors":"Ivan A. Pshenichnyuk,&nbsp;Muneeb Farooq,&nbsp;Daniil S. Zemtsov,&nbsp;Denis M. Zhigunov,&nbsp;Sergey S. Kosolobov,&nbsp;Vladimir P. Drachev","doi":"10.1016/j.photonics.2026.101582","DOIUrl":"10.1016/j.photonics.2026.101582","url":null,"abstract":"<div><div>We theoretically investigate silicon nitride photonic chips heterogeneously integrated with group-III nitride blue light sources. Low losses, high levels of miniaturization and a built-in light generating mechanism potentially make the selected platform attractive for various applications and may lead to the development of an additive for silicon photonics. We use a combination of the drift–diffusion equations with optical transitions and Maxwell’s equations to construct a model of the proposed multilayer structure. The model allows the best parameters to be chosen simultaneously for the light-emitting heterostructure and waveguiding layers to obtain an optimal coupling regime. Various optimal geometries are analyzed with respect to the captured power, desired polarization and excited modes. By revision of the source heterostructure relative to the free space emitting one and matching it with a silicon nitride circuit, high transmittance coefficients of up to 0.87 are obtained. The numbers are promising and pave the way toward integrated blue photonic circuits.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101582"},"PeriodicalIF":3.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565176","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}

{"title":"Intelligent graphene-based metamaterial solar absorber: AI-driven parametric optimization for ultrabroadband absorptance enhancement in renewable energy systems applications and performance analysis","authors":"Khaled Aliqab ,&nbsp;Bo Bo Han ,&nbsp;Ammar Armghan ,&nbsp;Meshari Alsharari ,&nbsp;Yogesh Sharma ,&nbsp;Shobhit K. Patel","doi":"10.1016/j.photonics.2026.101561","DOIUrl":"10.1016/j.photonics.2026.101561","url":null,"abstract":"<div><div>The developed global demand for renewable energy technologies has intensified efforts toward developing high-performance solar thermal absorbers as sustainable alternatives to fossil fuels, which continue to deplete natural resources and harm the environment. In the proposed study, a novel multilayer nanostructured broadband solar design is presented to achieve near perfect thermal absorption efficiency over a broad spectral range while maintaining practical applicability for diverse renewable energy systems. The designed structure consists of three carefully selected materials Chromium (Cr), Indium (III) selenide (In₂Se₃), and Tungsten (W) arranged sequentially from the resonator layer to the base layer to promote strong light–matter interaction and effective heat conversion. Furthermore, an ultrathin graphene layer is incorporated to enhance optical absorption, improve thermal stability, and support broadband performance. Numerical results demonstrate that the proposed absorber achieves a near-perfect absorptance of approximately 97% at wavelengths beyond 800 nm, while sustaining about 90% absorption over a wide spectral range at 2800 nm. These broadband absorption characteristics make the absorber highly suitable for efficient solar thermal energy harvesting. To further improve performance, machine learning–based optimization using linear regression was employed, achieving a high coefficient of exploration (R² = 0.98) and low MSE with 0.211187 × 10⁻⁴, confirming the robustness and predictive accuracy of the model. Owing to its versatility and efficiency, the current absorber can be utilized in solar heaters, solar cookers, space heating, crop drying, solar stills, industrial heating, and thermal shielding. This work demonstrates the strong potential of integrating advanced material engineering with machine learning optimization to realize efficient, multifunctional, and environmentally sustainable solar thermal absorber designs for future renewable energy applications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101561"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147991200","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}

{"title":"Strong plasmon-mediated coupling between two distant quantum emitters by the dark-gap-plasmon waveguide with two pincers","authors":"Jie Hong,&nbsp;Heng Dai,&nbsp;Jing-Feng Liu,&nbsp;Guanghui Liu,&nbsp;Feng Wu,&nbsp;Yongzhu Chen,&nbsp;Gengyan Chen","doi":"10.1016/j.photonics.2026.101585","DOIUrl":"10.1016/j.photonics.2026.101585","url":null,"abstract":"<div><div>Strong radiative coupling between two separated quantum emitters enables reversible and fast exchange of single quantum. Metallic nanostructure can mediate and enhance the radiative coupling, while its radiative loss and Ohmic loss limit the interaction range. In this article, the dark-gap-plasmon (DGP) waveguide with two pincers is developed to mediate the strong plasmon-mediated coupling between two distant quantum emitters as far as 6000 nm. The waveguide’s resonant wavelength can be tuned to longer wavelength by increasing its length, or decreasing its width, gap width or semi-cylinder radius. The plasmon-mediated coupling strength between two quantum emitters can be enhanced by decreasing its width, gap width or semi-cylinder radius. These findings provide significant guidance to transfer single quantum and transmit quantum information between two distant quantum emitters.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101585"},"PeriodicalIF":3.5,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148565174","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}

{"title":"Deterministic routing and port-based decoding for SAM–OAM multiplexing and demultiplexing using an all-dielectric metasurface","authors":"Lijian Zhang ,&nbsp;Tianle Wei ,&nbsp;Xuejiao Hu ,&nbsp;Tengrui Ma ,&nbsp;Yujin Cui ,&nbsp;Zepeng Zhao ,&nbsp;Hua Guo ,&nbsp;Shu Li","doi":"10.1016/j.photonics.2026.101576","DOIUrl":"10.1016/j.photonics.2026.101576","url":null,"abstract":"<div><div>We propose and numerically demonstrate an all-dielectric metasurface operating at 1550 nm for spin–orbital angular-momentum (SAM–OAM) multiplexing and demultiplexing. A single-layer anisotropic silicon-nanofin metasurface supported by a SiO₂ substrate is employed to jointly engineer the dynamic phase and the Pancharatnam–Berry (PB) phase for channelized angular-momentum control. In the multiplexing mode, the polarization helicity <span><math><mrow><mi>s</mi><mo>∈</mo><mrow><mo>{</mo><mi>RCP</mi><mo>,</mo><mspace></mspace><mi>LCP</mi><mo>}</mo></mrow></mrow></math></span> together with an angle-defined channel index is encoded into a three-bit codeword <span><math><mrow><mo>[</mo><msub><mrow><mi>b</mi></mrow><mrow><mn>2</mn></mrow></msub><msub><mrow><mi>b</mi></mrow><mrow><mn>1</mn></mrow></msub><msub><mrow><mi>b</mi></mrow><mrow><mn>0</mn></mrow></msub><mo>]</mo></mrow></math></span>, enabling deterministic coupling of multiple inputs into coaxial angular-momentum channels for parallel transmission. In the demultiplexing mode, the joint states <span><math><mrow><mo>|</mo><mrow><mi>s</mi><mo>,</mo><mi>m</mi><mo>〉</mo></mrow></mrow></math></span> with <span><math><mrow><mi>m</mi><mo>∈</mo><mrow><mo>{</mo><mo>−</mo><mn>1</mn><mo>,</mo><mo>+</mo><mn>1</mn><mo>,</mo><mo>−</mo><mn>2</mn><mo>,</mo><mo>+</mo><mn>2</mn><mo>}</mo></mrow></mrow></math></span> are deterministically routed and reconstructed into preassigned off-axis spatial ports. We further introduce a fixed-ROI port-power readout criterion on the focal plane, converting continuous field distributions into port-resolved digital readout and establishing an integrated “encode–route–decide” physical-layer framework. Numerical results verify the prescribed codeword-to-port correspondence, near-uniform ROI-level port allocation, and spin selectivity of 93%–95% for LCP and 84%–90% for RCP. Additional fixed-ROI crosstalk analysis further reveals measurable OAM-dependent inter-port coupling, indicating that port isolation remains an important target for further optimization. Within the numerically validated eight-state SAM–OAM encoding framework, this work provides a compact approach for decision-enabled routing and port-resolved readout of structured-light states, offering a basis for multi-degree-of-freedom structured-light encoding and port-based optical information measurement.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101576"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148167536","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}

{"title":"Theoretical analysis of the novel samarium nickelate (SmNiO₃)-based broadband terahertz (THz) metamaterial absorbers","authors":"Md. Saffat Gohor ,&nbsp;Mehedi Hasan Tonmoy ,&nbsp;Md. Imran Hasmi ,&nbsp;Md. Islahur Rahman Ebon ,&nbsp;Foez Ahmed ,&nbsp;Jaker Hossain","doi":"10.1016/j.photonics.2026.101568","DOIUrl":"10.1016/j.photonics.2026.101568","url":null,"abstract":"<div><div>Samarium nickelate, SmNiO₃ (SNO), a novel phase-changing material, is used for the first time in designing and developing a broadband metamaterial absorber for potential THz applications. Two unique designs are proposed in this article, comprising a three-layered composition incorporating SNO as the top resonator layer and gold (Au) as the ground layer, which are separated by an underexplored yet promising dielectric material known as lithium metagermanate, Li₂GeO₃ (LGO). The simulation results showed that both the auxetic and concentric circular ring patterns provide significant absorption performance at normally incident THz waves. For instance, the proposed auxetic patterned structure is maintained over 90% absorption from 4.24 to 11.41 THz, exhibiting a bandwidth of 7.17 THz and a relative absorption bandwidth (RAB) of 91.62%. On the other hand, the proposed circular patterned structure is maintained above 90% absorption, ranging from 2.77 THz to 11.13 THz, showing a bandwidth of 8.36 THz and an RAB of 120.29%. The numerical analysis validates wide-angle absorption for different incident angles in transverse electric (TE) and transverse magnetic (TM) modes and polarization insensitivity. Being equipped with prominent characteristics like broadband and consistent absorption, angular stability and tunability, the introduced SNO-based meta-absorbers open a new door of possibilities and display excellent application prospects in emerging THz applications.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101568"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147991305","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}

{"title":"Influence of incident light properties on the formation of silver nanotriangles from spherical nanoparticles","authors":"Luis J. Mendoza-Herrera ,&nbsp;Ivan Urbina ,&nbsp;Ruth D. Mojica-Sepúlveda ,&nbsp;Maria E. Etcheverry ,&nbsp;Valeria B. Arce ,&nbsp;Myrian C. Tebaldi","doi":"10.1016/j.photonics.2026.101557","DOIUrl":"10.1016/j.photonics.2026.101557","url":null,"abstract":"<div><div>This work investigates the role of incident light properties in the formation of silver nanotriangles from spherical nanoparticles under LED irradiation. Unlike previous studies focused on post-synthesis reshaping, this study examines the formation pathway and transformation kinetics. Silver nanospheres with an initial plasmon resonance at 403 nm were irradiated using LEDs at 387.3, 464.3, 533.7, and 628.7 nm. A clear wavelength-dependent size evolution was observed, with nanotriangle edge lengths increasing linearly with the incident wavelength. Time-resolved extinction spectroscopy revealed a progressive decrease in the spherical nanoparticle peak, accompanied by the emergence of a second peak associated with triangular nanostructures. These results indicate that plasmon-mediated energy deposition drives anisotropic restructuring via surface atom diffusion and nanoparticle coalescence, providing insight into wavelength-controlled nanoparticle synthesis.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101557"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147956766","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}

{"title":"MXene covered one dimensional plasmonic grating as analyte detector","authors":"Ali Hemmati ,&nbsp;Soodabeh Nouri Jouybari ,&nbsp;Saeed Mirzanejhad ,&nbsp;Seyedeh Mehri Hamidi","doi":"10.1016/j.photonics.2026.101530","DOIUrl":"10.1016/j.photonics.2026.101530","url":null,"abstract":"<div><div>Surface plasmon-based devices are widely used as highly sensitive optical sensing tools in diverse fields, including biological and chemical detection. The use of digital versatile discs (DVDs) as sensor substrates provides an attractive approach for developing surface plasmon resonance (SPR) sensors due to their easy availability, low cost, and nanoscale smooth surface. A silver coating on DVDs acts as the active metal layer and provides favorable plasmonic properties, although its sensitivity and optical stability remain limited. In this study, a two-dimensional (2D) material, MXene, was applied as a reinforcing layer on the silver-coated DVD surface to improve plasmonic performance. A pronounced polarization-dependent behavior is observed in the reflection spectra after MXene integration. This polarization-dependent response is advantageous for the design of compact and portable SPR sensing systems. The dependence of the spectra on the refractive index of the surrounding medium and the incident beam angle was also investigated.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"71 ","pages":"Article 101530"},"PeriodicalIF":2.9,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147651060","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}