Photonics and Nanostructures-Fundamentals and Applications最新文献

{"title":"Corrigendum to “Investigation of nonlinear optical properties in GaAs/GaAlAs quantum well with modified Lennard-Jones potential: Role of static electromagnetic fields, intense laser radiation and structure parameters” [Photonics Nanostruct. - Fundam. Appl. 65 (2025) 101403]","authors":"K. Hasanirokh , E.B. AL , A.T. Tuzemen , M. Sayrac , H. Sayrac , F. Ungan","doi":"10.1016/j.photonics.2025.101419","DOIUrl":"10.1016/j.photonics.2025.101419","url":null,"abstract":"","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101419"},"PeriodicalIF":2.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988325","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 design of colored passive cooling multilayer films using bidirectional neural networks and genetic algorithms","authors":"Kai Lu ,&nbsp;Long Chen ,&nbsp;Chengyuan Li ,&nbsp;Haojun Zhu ,&nbsp;Chengchao Wang ,&nbsp;Lanxin Ma","doi":"10.1016/j.photonics.2025.101445","DOIUrl":"10.1016/j.photonics.2025.101445","url":null,"abstract":"<div><div>Colored passive cooling combines vibrant coloration with passive cooling capabilities, attracting significant interest in sustainable energy applications. While nanostructured colored passive cooling designs show promise, achieving precise colors with cooling power remains computationally challenging due to complex geometric parameter optimization. This study presents an innovative bidirectional design framework combining bidirectional neural network (BNN) and genetic algorithm (GA), to assist in the design of multilayer films. BNN accurately forecasts color and cooling power (99.67 % accuracy) from structural parameters and temperature <em>T</em>, and inversely designs geometric parameters (99.86 % accuracy) based on desired color and cooling performance at the given temperature. Crucially, the GA-based framework explores multiple high-precision solutions based on desired parameters, effectively addressing the “one-to-many” inverse design problem, overcoming the BNN’s single-solution limitation. The designed PMMA/TiN/TiO₂/Ag films achieve a broad color gamut, covering 62 % of the CIE-1931 color space, while maintaining its equilibrium temperature only 2 −3 K above the ideal device. Together, these machine learning frameworks establish a full-cycle design paradigm: BNN enables bidirectional property-structure mapping with ultra-high accuracy while the GA- forward prediction model hybrid efficiently generates diverse optimal designs satisfying multi-objective constraints. This dual methodology accelerates the discovery of novel colored passive coolers, accelerating the development and deployment of energy-efficient solutions for significant contributions to energy conservation and sustainable development.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101445"},"PeriodicalIF":2.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145046092","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":"Optical response of Au/n-Si schottky photodiode with an interface of graphite-Er2O3-doped polyvinyl alcohol (PVA) nanocomposite","authors":"Ferhat Hanife ,&nbsp;Yosef Badali","doi":"10.1016/j.photonics.2025.101446","DOIUrl":"10.1016/j.photonics.2025.101446","url":null,"abstract":"<div><div>In this study, the photoconductive properties of a Schottky photodiode with the structure Au/PVA:Graphite-Er₂O₃/n-Si are investigated both in the dark and under varying light intensities. A thin layer of the polyvinyl alcohol doped with Graphite-Er₂O₃ is placed at the metal-semiconductor interface to create an Schottky photodiode with a metal-nanocomposite-semiconductor structure. The fabrication and preparation techniques are thoroughly documented. X-ray diffraction (XRD) is used to analyze the Graphite and Er₂O₃ nanostructures. Several key photoconductive properties, such as leakage or reverse-saturation current (<em>I₀</em>), electric potential barrier height (<em>Φ</em>_<em>B0</em>), and ideality factor (<em>n</em>), series/shunt resistances (<em>R</em>_<em>s</em><em>/R</em>_<em>sh</em>), surface/interface state density distribution (N_ss), photocurrent (<em>I</em>_<em>ph</em>), photosensitivity (<em>S</em>), optical responsivity (<em>R</em>), and specific detectivity (<em>D*</em>) have been determined. Increasing light intensity leads to higher <em>I₀</em> and n values, and lower <em>Φ</em>_<em>B0</em> and <em>R</em>_<em>s</em> values. When studying the illumination dependency of photocurrent, the <em>I</em>_<em>ph</em>–<em>P</em> plots at zero bias voltage exhibit a linear behavior within an acceptable range. The PVA:Graphite-Er₂O₃ nanocomposite enhances the photosensitivity of the metal-nanocomposite-semiconductor type photodiode, optical responsivity, and specific detectivity by 1120, 2.40 mA/W, and 3.13 × 10 ¹ ⁰ Jones, respectively. These results suggest that the Au/PVA:Graphite-Er₂O₃/n-Si structure exhibits a promising photoresponse and could potentially replace traditional metal-semiconductor photodiode in optoelectronic devices and photovoltaic systems.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101446"},"PeriodicalIF":2.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095204","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":"Giant enhancement of the Goos-Hänchen shift by hyperbolic shear polaritons with beta-phase Ga2O3 in the mid-infrared spectrum","authors":"Lu Yang,&nbsp;Xiongwen Chen,&nbsp;Chang Liu,&nbsp;Wang Zeng,&nbsp;Xinwu Liu,&nbsp;Zihao Liu","doi":"10.1016/j.photonics.2025.101453","DOIUrl":"10.1016/j.photonics.2025.101453","url":null,"abstract":"<div><div>In this paper, we theoretically investigate the Goos-Hänchen (GH) shift in an Otto configuration based on beta-phase Ga₂O₃ (bGO). The study shows that when TM-polarized light is incident, hyperbolic shear polaritons (HShPs) can induce a significant GH shift in the mid-infrared range. The significant GH shift in reflection is caused by local phase changes at the interface, which result from the excitation of HShPs. The magnitude and sign of the GH shift vary with device rotation and air gap thickness. By selecting appropriate air gap thickness and angle of incidence, a GH shift up to <span><math><mrow><mn>2000</mn><mspace></mspace><mi>λ</mi></mrow></math></span> can be achieved near the angle of incidence where the sign changes. Utilizing the tunable GH shift, we design an anisotropic refractive index sensor, providing theoretical guidance for potential industrial applications. Furthermore, our results indicate that the tunable GH shift method based on prism coupling has significant potential applications in biosensing, beam alignment, and optical detection.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101453"},"PeriodicalIF":2.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265778","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":"Resonant mode crossing in hybrid structures for effective light-emission","authors":"Martin Rojas-Bustamante ,&nbsp;Ruslan Azizov ,&nbsp;Ravshanjon Nazarov ,&nbsp;Mingzhao Song ,&nbsp;Pavel S. Pankin ,&nbsp;Dmitrii N. Maksimov ,&nbsp;Sergey Makarov ,&nbsp;Andrey Bogdanov","doi":"10.1016/j.photonics.2025.101436","DOIUrl":"10.1016/j.photonics.2025.101436","url":null,"abstract":"<div><div>Bound states in the continuum (BICs) are specific resonant modes with infinite radiative quality factors that arise from a mismatch with free-space radiation through mechanisms of symmetry protection, parameter tuning, or accidental degeneracy. To harness the significant potential of BICs for light-emission applications such as LEDs and lasers, it is essential to efficiently integrate light-emitting nanomaterials with BIC-based architectures. Here, we numerically model the effect of a light-emitting capping layer on the plasmon-photonic hybrid system consisting of an aluminum substrate with a two-dimensional periodic wave-like interface to an anodic alumina photonic crystal slab. We consider CdSe/CdS nanoplatelets (NPLs) as the gain material because of their high potential for industrial applications. The proposed practical guide for compliance with the conditions for bound states formation, spectrally aligned with the photoluminescence band of the NPLs, can be further used for experimental realization in high-performance solution-processable lasers.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101436"},"PeriodicalIF":2.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144921840","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":"Dual-band MWIR and broadband LWIR perfect absorber based on graphene and Ti rings embedded structure","authors":"Yun Fang ,&nbsp;Jian Liu ,&nbsp;Weiyu Chen ,&nbsp;Fangjiaming Zhao ,&nbsp;Xue Zhang ,&nbsp;Dandan Wang ,&nbsp;Wanchun Yang","doi":"10.1016/j.photonics.2025.101444","DOIUrl":"10.1016/j.photonics.2025.101444","url":null,"abstract":"<div><div>This paper proposes a dual-band mid-wave infrared (MWIR: 3–<span><math><mrow><mn>5</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>) and tunable broadband long-wave infrared (LWIR: 8–<span><math><mrow><mn>14</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>) perfect absorber based on embedded Ti rings and graphene. The absorber consists of a graphene top layer, dielectric layers of Si₃N₄, Al₂O₃, and Si, with four Ti rings and a cross-shaped graphene pattern embedded in the Si layer, all supported by a Ti substrate. The numerical results indicate that two near-perfect absorption peaks at <span><math><mi>λ</mi></math></span> ₁ = <span><math><mrow><mn>3</mn><mo>.</mo><mn>23</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> (99.80%) and <span><math><mi>λ</mi></math></span> ₂ = <span><math><mrow><mn>4</mn><mo>.</mo><mn>13</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span> (99.53%) within the MWIR range. Broadband absorption exceeding 90% is achieved across 6.67—<span><math><mrow><mn>14</mn><mo>.</mo><mn>17</mn><mspace></mspace><mi>μ</mi><mi>m</mi></mrow></math></span>, with an average absorption of 96.3% over the LWIR window. The broadband performance originates from synergistic Fabry-Pérot(F-P) resonances in the multilayer dielectric stack and surface plasmon resonances (SPR) enabled by the Ti and graphene hybrid configuration, which endows the proposed structure with a broader bandwidth and superior absorption capability compared to previously reported designs. With advantages including broadband operation, high absorption, and high stability, the proposed absorber holds significant potential for infrared thermal imaging, infrared stealth and detection.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101444"},"PeriodicalIF":2.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095205","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":"Multifunctional vortex fields manipulation enabled based on vanadium dioxide metasurfaces","authors":"Wenqiang Shi ,&nbsp;Hengli Feng ,&nbsp;Lan Zhang ,&nbsp;Xiuyu Zhao ,&nbsp;Junming Li ,&nbsp;Hongyan Meng ,&nbsp;Yang Jia ,&nbsp;Yachen Gao","doi":"10.1016/j.photonics.2025.101448","DOIUrl":"10.1016/j.photonics.2025.101448","url":null,"abstract":"<div><div>Vanadium dioxide (VO₂), a prototypical phase-change material, endows terahertz waves with dynamic tunability through its insulator–metal transition. Here we demonstrate a reconfigurable metasurface that exploits VO₂’s dramatic optical switching capability. Based on VO₂, we designed a reflective metasurface which possesses switchable characteristics and can realize several functions including generation of vortex beams, split vortex beams, split vortex beams with focused orbital angular momentum (FOAM), and multi-channel FOAM. Specifically, the paper discusses vortex beams with topological charges <em>l</em> = 1 and <em>l</em> = 2, phase distributions for two-way and four-way splitting, as well as split vortex beams with <em>l</em> = 2, which enhance the capacity for information transmission. A high-purity FOAM function with a focal length of 6000 μm is achieved at a frequency of 0.39 THz. Finally, by combining the FOAM metasurface with split-phase superposition, multi-channel FOAM beams is successfully realized. When linearly polarized waves (LP) are incident on the split FOAM metasurface, the far-field amplitude exhibits four energy channels. In the circumstance of left circularly polarized (LCP) and right circularly polarized (RCP) waves being incident separately, the phase amplitude distribution is oriented towards the negative <em>y</em>-axis and the positive <em>y</em>-axis, respectively, thereby reflecting the transmission of wave in disparate directions. Furthermore, when VO₂ switches to dielectric state, the reflection behavior of the metasurface transitions to specular reflection. The novelty of our approach lies in the dynamic and multifunctional integration of these distinct manipulation capabilities onto a single, reconfigurable platform. By harnessing the phase transition of VO₂, we demonstrate on-demand switching among the operational modes—an advance beyond conventional static metasurfaces. Vortex beams, split vortex beams, FOAM effects, and split FOAM provide diverse means for light-field control and open new possibilities for designing highly tunable, precisely controlled optical devices.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101448"},"PeriodicalIF":2.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145265779","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":"Reconfigurable narrowband-to-broadband absorber featuring GeTe’s phase change planar structures","authors":"Israel Alves Oliveira ,&nbsp;Vitaly Felix Rodriguez-Esquerre ,&nbsp;Igor Leonardo Gomes de Souza","doi":"10.1016/j.photonics.2025.101447","DOIUrl":"10.1016/j.photonics.2025.101447","url":null,"abstract":"<div><div>Phase change materials (PCMs) like GeTe have become essential in reconfigurable nanophotonic devices due to their ability to undergo reversible structural transitions between amorphous and crystalline states, which lead to significant, tunable changes in optical properties. This tunability allows for dynamic control over light-matter interactions, making PCMs ideal for optical switches, modulators, and adaptive photonic systems. In this study, we propose a reconfigurable narrowband-to-broadband absorber based on planar GeTe structures integrated with GaAs layers and a Silicon and a gold thin-film substrate, which we designed and analyzed numerically by the Finite Element Method (FEM). Our design leverages the contrasting behaviors of GeTe: the amorphous phase enables narrowband absorption, while the crystalline phase broadens the absorption spectrum to cover the range from 1150 to 1750 nm. The influence of material thickness was also assessed to evaluate manufacturing error tolerances, allowing for a more precise selection of the desired configuration. The effects of oblique incidence angles on Transversal Electric (TE) and Transversal Magnetic (TM) polarized waves were analyzed for both cases. Additionally, the physical mechanisms of field coupling were investigated.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101447"},"PeriodicalIF":2.9,"publicationDate":"2025-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117977","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":"Topological properties in a GaAs-SU8-Based phoxonic crystal with high Q factor and mechanics-optics coupling coefficient","authors":"Hanbo Shao,&nbsp;XiaoChen Hang,&nbsp;Dong Jiang","doi":"10.1016/j.photonics.2025.101435","DOIUrl":"10.1016/j.photonics.2025.101435","url":null,"abstract":"<div><div>We propose a two-dimensional GaAs-SU8-Based (SU8 photoresist is a high-contrast epoxy negative photoresist) phoxonic crystal to simultaneously exhibit topological characteristic of electromagnetic and elastic waves. By rotating the angle of SU8 holes with respect to the center of the regular hexagon, diarc cone degeneracy occurs at both photonic and phononic bandgap, accompanied by band flipping. Further, the topological transmission and robustness is verified by design three different interface channels with a 30°/-30° flip. We investigate the <em>Q</em> factor of both mechanics and optics in this topological system, when the ratio n = 0.2 (radius r to the lattice constant a) and a= 340μm, <em>Q</em>_photonic and <em>Q</em>_phononic achieve highest, equal to 6432 and 2508, respectively. At this time, the mechanics-optics coupling in the phoxonic cavity reaches its maximum, g_mb= 1024 Hz, g_pe= 75.2 Hz and g= 1099.2 Hz. (g_mb means the moving interface effect; g_pe means the photoelastic effect, and g means the The mechanics-optics coupling coefficient) The propose PxCs realize highly topologically protected and robust characteristics with the effect of maintaining high optical force coupling rate. Providing a model reference for the design of mechanic-optic functional devices such as liquid concentration sensor, mass sensor and micro-displacement sensor.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101435"},"PeriodicalIF":2.9,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144890584","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":"Study on fluorescence collection enhancement of NV color centers in diamond by anti-reflection gradient refractive index diamond-like coatings","authors":"Zhanqing He ,&nbsp;Yanlong Du ,&nbsp;Xin Tan ,&nbsp;Jiachang Li ,&nbsp;Lei Cang ,&nbsp;Tianning Pang ,&nbsp;Hui Qi","doi":"10.1016/j.photonics.2025.101432","DOIUrl":"10.1016/j.photonics.2025.101432","url":null,"abstract":"<div><div>The nitrogen-vacancy (NV) color centers in diamond, recognized as the most prevalent defect centers, are extensively utilized in fields such as quantum communication and quantum sensing. However, the high reflectance at the diamond-air interface results in low fluorescence collection efficiency of NV color centers. To address this challenge, this paper proposes the deposition of an anti-reflection gradient refractive index diamond-like coating (DLC) on the diamond substrate to enhance light transmittance and, consequently, improve the fluorescence collection from the NV color centers. By employing the finite-difference time-domain method in conjunction with a gradient refractive index distribution, we simulate the number of DLC layers and their thickness to assess the effects of the anti-reflection coating on transmittance, reflectance, and emission efficiency of the NV color centers within the diamond substrate. This analysis elucidates the mechanisms by which the anti-reflection coating enhances fluorescence collection in the NV color centers. Furthermore, we prepared the diamond substrate using the microwave plasma chemical vapor deposition method and applied the anti-reflection coating via the magnetron sputtering technique. Testing demonstrated that with the addition of the anti-reflection coating, reflectivity was reduced to a mere 1.7 %, reduce by about 1/10 lower than without the coating. Additionally, following the deposition of the anti-reflective coating, the fluorescence collection of the NV⁰ and NV^- color centers was significantly enhanced, with the fluorescence collection of the NV⁰ color centers increasing by 1.7 times and that of the NV^- color centers increasing by 1.9 times.</div></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"66 ","pages":"Article 101432"},"PeriodicalIF":2.9,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144886269","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}