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

Jones matrices-based inverse-designed metasurface enabling amplitude and phase modulation for circular polarization 基于琼斯矩阵的反设计超表面，实现圆极化的幅度和相位调制

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-10-20 DOI: 10.1016/j.photonics.2025.101457

Zhe Wang , Jialei Li , Fangxu Zhao , Qi Han , Yuhang He , Lin Yang , Ming Zhang

The Jones matrices serve as a pivotal tool for connecting the electric field of incident polarized waves with that of outgoing polarized waves, where its two degrees of freedom correspond to the modulation capabilities of amplitude and phase for incident polarized wave. However, due to the complexity of the Jones vector for circularly polarized waves, previous research has predominantly focused on modulating linearly polarized waves, while less attention has been paid to the modulation of circularly polarized waves. This paper proposes an inverse-designed holographic metasurface for circularly polarized waves, enabling independent control of both amplitude and phase in the Jones matrices. The metasurface consists of periodically arranged anisotropic nanorods, with the geometric dimensions and rotation angles of each nanorod obtained through inverse calculation and matching with a meta-atom library, while maintaining a high transmission efficiency exceeding 90 %. As a proof of concept, we integrate a nanoprinting image and two holographic images into a single metasurface, demonstrating independent modulation capabilities across three channels for amplitude and phase in the Jones matrices. As a functional extension, this paper also designs an amplitude-optimized beamforming metasurface capable of precisely deflecting the incident beam to the target elevation and azimuth angles. The metasurface platform presented here provides a significant design reference for multidimensional control of circularly polarized waves, near- and far-field holographic imaging, optical encryption, and other applications.

琼斯矩阵是连接入射极化波电场与出射极化波电场的关键工具，其两个自由度对应于入射极化波的振幅和相位调制能力。然而，由于圆极化波的琼斯矢量的复杂性，以往的研究主要集中在调制线极化波上，而对圆极化波的调制关注较少。本文提出了一种圆极化波的反设计全息超表面，实现了琼斯矩阵中振幅和相位的独立控制。该超表面由周期性排列的各向异性纳米棒组成，每个纳米棒的几何尺寸和旋转角度通过逆计算并与元原子库匹配得到，同时保持了超过90% %的高传输效率。作为概念验证，我们将纳米打印图像和两个全息图像集成到单个超表面中，展示了Jones矩阵中三个通道振幅和相位的独立调制能力。作为功能扩展，本文还设计了一个振幅优化波束形成超表面，能够精确地将入射波束偏转到目标仰角和方位角。本文提出的超表面平台为圆偏振波的多维控制、近场和远场全息成像、光学加密等应用提供了重要的设计参考。

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引用次数: 0

Optical spintronics: Towards optical communication without energy transfer 光自旋电子学：迈向无能量转移的光通信

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-10-18 DOI: 10.1016/j.photonics.2025.101458

Ilya Deriy , Danil Kornovan , Mihail Petrov , Andrey Bogdanov

We introduce the concept of optical spin current—transfer of optical spin angular momentum by an electromagnetic field without accompanying energy transfer. This phenomenon is analogous to electron spin currents, in which spin flow is decoupled from charge flow. Building on this principle, we propose an optical spin diode and an optical spin circulator–devices that enable unidirectional propagation of spin currents while maintaining bidirectional energy flow, thus, preserving reciprocity. Furthermore, we demonstrate asymmetric spin transfer between two quantum dots mediated by the optical spin diode, highlighting its potential for novel optical spintronic functionalities. These findings lay the foundation for devices leveraging optical spin transfer, opening new avenues in optical spintronics.

引入了光自旋角动量在电磁场作用下不伴随能量传递的光自旋电流传递概念。这种现象类似于电子自旋流，其中自旋流与电荷流解耦。基于这一原理，我们提出了一种光自旋二极管和一个光自旋环行器，这两种装置可以在保持双向能量流动的同时，实现自旋电流的单向传播，从而保持互易性。此外，我们证明了由光学自旋二极管介导的两个量子点之间的不对称自旋转移，突出了其新型光学自旋电子功能的潜力。这些发现为利用光自旋转移的器件奠定了基础，为光自旋电子学开辟了新的途径。

引用次数: 0

Optically transparent multiband stealth film compatible with dual-band heat dissipation 光透明多波段隐身膜，兼容双波段散热

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-10-17 DOI: 10.1016/j.photonics.2025.101459

Li Lin , Bowei Xie , Xingcan Li , Jia-yue Yang

The accelerated development of armaments and detection technologies has led to a growing demand for stealth films that are capable of both multiband stealth and effective heat dissipation. In this work, a multilayer film is proposed to achieve optically transparent and infrared stealth, while also providing exceptional heat dissipation, with high emittance of 0.831 and 0.820 in the bands of 2.5–3 and 5–8 μm, respectively. The film's emittance tunability exceeds 0.600, showcasing its outstanding modulation capabilities. In the VIS band, the film's transmittance is 0.588 in the metallic state and 0.553 in the insulating state, which facilitates its application in military equipment windows. The underlying mechanism for these properties involves FP resonance and multiple reflections. Calculations regarding the infrared signal intensity reduction and infrared image confirm the film's exceptional camouflage performance. This technology facilitates the progress and practical deployment of optically transparent stealth films.

随着军备和探测技术的快速发展，对既能多波段隐身又能有效散热的隐身膜的需求日益增长。在这项工作中，提出了一种多层薄膜，以实现光学透明和红外隐身，同时提供出色的散热，在2.5-3和5-8 μm波段分别具有0.831和0.820的高发射度。该薄膜的发射度可调性超过0.600，显示出其出色的调制能力。在VIS波段，该薄膜在金属状态下的透光率为0.588，在绝缘状态下的透光率为0.553，有利于其在军事装备窗户上的应用。这些特性的潜在机制涉及FP共振和多次反射。关于红外信号强度降低和红外图像的计算证实了薄膜的特殊伪装性能。这项技术促进了光学透明隐身膜的进步和实际部署。

引用次数: 0

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] “具有修正Lennard-Jones势的GaAs/GaAlAs量子阱非线性光学性质的研究：静态电磁场，强激光辐射和结构参数的作用”[Photonics Nanostruct]的更正。——Fundam。app . 65 (2025) 101403]

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-09-01 DOI: 10.1016/j.photonics.2025.101419

K. Hasanirokh , E.B. AL , A.T. Tuzemen , M. Sayrac , H. Sayrac , F. Ungan

引用次数: 0

Investigation of the effect of resistivity and defects on optical THz modulation of graphene on Si/SiO2 substrate 电阻率和缺陷对石墨烯在Si/SiO2衬底上太赫兹光调制的影响研究

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-09-01 DOI: 10.1016/j.photonics.2025.101451

Abhilasha Chouksey , Shivnath Kumar , Preeti Gaur , Preeti Garg , Radhapiyari Laishram , Anupama Singh , J.S. Rawat , Neeraj Khare

THz wave can be modulated by electrical bias or by optical pumping. In the present work, we have fabricated graphene (Gr) based THz modulator on two Si/SiO₂ substrates with different resistivities (10 kΩ.cm and 5 kΩ.cm) and studied the effect of their resistivities and doping on THz modulation by optical pumping. THz modulation by optical pumping was measured for 0.2 THz to 0.6 THz frequency range with varying pumping power from 0 mW to 800 mW using a 976 nm laser. The estimated modulation depth was ≈ 99 % at 800 mW in graphene on Si/SiO₂ having lower resistivity (LRSi/SiO₂) whereas it was < 2 % in graphene on Si/SiO₂ having higher resistivity (HRSi/SiO₂). The higher value of modulation depth in graphene on LRSi/SiO₂ has been attributed to the lower resistivity of the substrate resulted in a larger number of free carriers for photoconduction in LRSi/SiO₂ which contributed to the greater carrier concentration and THz conductivity. Raman spectroscopy further confirmed that the doping is greater in graphene on LRSi/SiO₂ as compared to graphene on HRSi/SiO₂. This resulted in an enhanced number of photocarriers responsible for higher THz modulation.

太赫兹波可以通过电偏置或光抽运来调制。在本文中，我们在两种不同电阻率的Si/SiO2衬底（10 kΩ.cm和5 kΩ.cm）上制备了石墨烯基太赫兹调制器，并研究了它们的电阻率和掺杂对光泵浦太赫兹调制的影响。使用976 nm激光器，在0 mW到800 mW的泵浦功率范围内，测量了0.2 ~ 0.6 太赫兹频率范围内的光泵浦太赫兹调制。在电阻率较低（LRSi/SiO2）的Si/SiO2上的石墨烯在800 mW时的调制深度估计为≈ 99 %，而在电阻率较高（HRSi/SiO2）的Si/SiO2上的石墨烯的调制深度估计为<； 2 %。LRSi/SiO2上石墨烯的调制深度值较高是由于衬底的电阻率较低，导致LRSi/SiO2中光导的自由载流子数量较多，从而导致载流子浓度和太赫兹电导率较高。拉曼光谱进一步证实，LRSi/SiO2上的石墨烯掺杂量大于HRSi/SiO2上的石墨烯掺杂量。这导致了负责更高太赫兹调制的光载流子数量的增加。

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引用次数: 0

Intelligent design of colored passive cooling multilayer films using bidirectional neural networks and genetic algorithms 基于双向神经网络和遗传算法的彩色被动冷却多层膜的智能设计

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-09-01 DOI: 10.1016/j.photonics.2025.101445

Kai Lu , Long Chen , Chengyuan Li , Haojun Zhu , Chengchao Wang , Lanxin Ma

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 T, 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.

彩色被动冷却结合了充满活力的色彩和被动冷却能力，吸引了可持续能源应用的显著兴趣。虽然纳米结构彩色被动冷却设计显示出前景，但由于复杂的几何参数优化，通过冷却功率实现精确的颜色仍然具有计算挑战性。本研究提出了一种结合双向神经网络（BNN）和遗传算法（GA）的创新双向设计框架，以辅助多层薄膜的设计。BNN根据结构参数和温度T准确预测颜色和冷却功率（99.67 %准确率），并根据给定温度下所需的颜色和冷却性能反设计几何参数（99.86 %准确率）。至关重要的是，基于遗传算法的框架探索了基于所需参数的多个高精度解，有效地解决了“一对多”反设计问题，克服了BNN的单解限制。所设计的PMMA/TiN/TiO2/Ag薄膜具有较宽的色域，覆盖了CIE-1931颜色空间的62% %，同时其平衡温度仅比理想器件高2 −3 K。总之，这些机器学习框架建立了一个全周期的设计范式：BNN实现了高精度的双向属性-结构映射，而遗传算法-前向预测模型混合有效地生成满足多目标约束的各种优化设计。这种双重方法加速了新型彩色被动式冷却器的发现，加速了节能解决方案的开发和部署，为节能和可持续发展做出了重大贡献。

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引用次数: 0

Optical response of Au/n-Si schottky photodiode with an interface of graphite-Er2O3-doped polyvinyl alcohol (PVA) nanocomposite 石墨- er2o3掺杂聚乙烯醇（PVA）纳米复合材料界面Au/n-Si肖特基光电二极管的光学响应

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-09-01 DOI: 10.1016/j.photonics.2025.101446

Ferhat Hanife , Yosef Badali

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 (I₀), electric potential barrier height (Φ_B0), and ideality factor (n), series/shunt resistances (R_s/R_sh), surface/interface state density distribution (N_ss), photocurrent (I_ph), photosensitivity (S), optical responsivity (R), and specific detectivity (D*) have been determined. Increasing light intensity leads to higher I₀ and n values, and lower Φ_B0 and R_s values. When studying the illumination dependency of photocurrent, the I_ph–P 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.

在这项研究中，研究了Au/PVA：石墨- er₂O₃/n-Si结构的肖特基光电二极管在黑暗和不同光强下的光导性能。在金属-半导体界面上放置一层掺杂石墨- er₂O₃的聚乙烯醇薄层，可以制造出具有金属-纳米复合材料-半导体结构的肖特基光电二极管。制造和制备技术是彻底的文件。采用x射线衍射（XRD）对石墨和Er₂O₃纳米结构进行了分析。几个关键的光导特性，如泄漏或反饱和电流（I 0）、电位势垒高度（ΦB0）和理想因数(n)、串联/分流电阻（Rs/Rsh）、表面/界面态密度分布（Nss）、光电流（Iph）、光敏性(S)、光响应性(R)和比探测率（D*）已经确定。随着光强的增加，I 0和n值升高，ΦB0和Rs值降低。当研究光电流的光照依赖性时，在零偏置电压下的iphp图在可接受的范围内呈现线性行为。PVA：石墨- er₂O₃纳米复合材料将金属-纳米复合材料-半导体型光电二极管的光敏性、光学响应率和比探测率分别提高了1120、2.40 mA/W和3.13 × 10 ¹ ⁰Jones。这些结果表明Au/PVA:Graphite-Er₂O₃/n-Si结构具有良好的光响应性能，有可能在光电器件和光伏系统中取代传统的金属半导体光电二极管。

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引用次数: 0

Ultra-high sensitivity and low loss: Innovative PCF simulated design featuring I-holes for harmful gas detection 超高灵敏度和低损耗：创新的PCF模拟设计，具有i孔有害气体检测

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-09-01 DOI: 10.1016/j.photonics.2025.101449

Amir Amir Mohammadi, Somayeh Makouei, Sajjad Mortazavi

Technological advancements have improved the quality of life but increased environmental pollution by releasing harmful gases such as ammonia, NO_x, CO, H₂S, and SO₂. Accurate detection of toxic gases is crucial for human and ecosystem health, as it prevents severe health complications caused by inhaling these gases. This study introduces a PCF designed to detect harmful gases. The proposed fiber structure has a hybrid hole arrangement in the cladding. The two grid-like square inner layers are surrounded by three irregular octagonal outer layers. The core region consists of two ring layers enclosing a central air hole. Four intermediate air holes (I-Hole) are strategically positioned along the boundary between the core and cladding, which play a crucial role in fiber optical performance. The I-Holes act as reflective barriers, preventing light from escaping the core and redirecting it back into the core. The precise placement and function of these I-Holes contribute to the overall efficiency and performance of the fiber. Eventually, ultra-high relative sensitivity with ultra-low confinement loss is achieved. The proposed structure demonstrates a relative sensitivity of 88.06 ± 0.69 % and a confinement loss of 3.76 × 10⁻⁵ ± 9.95 × 10⁻⁵ dB/m with a 2.6 coefficient of variation within the 1.45μm to 1.7μm wavelength range.

技术进步提高了生活质量，但也增加了环境污染，释放出氨、氮氧化物、一氧化碳、硫化氢和二氧化硫等有害气体。准确检测有毒气体对人类和生态系统的健康至关重要，因为它可以防止吸入这些气体造成严重的健康并发症。本研究介绍了一种用于检测有害气体的PCF。所提出的光纤结构在包层中具有混合孔排列。两个网格状的正方形内层被三个不规则的八角形外层包围。核心区域由两个环层组成，环绕着一个中央空气孔。四个中间空气孔（I-Hole）沿纤芯和包层之间的边界有策略地定位，它们对光纤的性能起着至关重要的作用。这些i孔起到了反射屏障的作用，防止光线从核心逃逸，并将其重新引导回核心。这些i孔的精确位置和功能有助于提高光纤的整体效率和性能。最终实现了超高相对灵敏度和超低约束损耗。该结构的相对灵敏度为88.06 ± 0.69 %，约束损耗为3.76 × 10−5±9.95 × 10−5 dB/m，在1.45μm ~ 1.7μm波长范围内变化系数为2.6。

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引用次数: 0

Giant enhancement of the Goos-Hänchen shift by hyperbolic shear polaritons with beta-phase Ga2O3 in the mid-infrared spectrum β相Ga2O3在中红外光谱中双曲剪切极化子对Goos-Hänchen位移的显著增强

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-09-01 DOI: 10.1016/j.photonics.2025.101453

Lu Yang, Xiongwen Chen, Chang Liu, Wang Zeng, Xinwu Liu, Zihao Liu

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

2000 λ

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.

在本文中，我们从理论上研究了基于β相Ga₂O₃（bGO）的Otto构型中的Goos-Hänchen （GH）移位。研究表明，当tm偏振光入射时，双曲剪切极化子（HShPs）可以在中红外范围内引起明显的GH位移。反射中显著的GH位移是由界面处的局部相位变化引起的，这是由HShPs激发引起的。GH位移的大小和符号随器件旋转和气隙厚度的变化而变化。通过选择合适的气隙厚度和入射角，可以在符号变化的入射角附近实现高达2000λ的GH位移。利用可调的GH位移，我们设计了一个各向异性折射率传感器，为潜在的工业应用提供了理论指导。此外，我们的研究结果表明，基于棱镜耦合的可调谐GH位移方法在生物传感、光束对准和光学检测方面具有重要的潜在应用前景。

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引用次数: 0

Resonant mode crossing in hybrid structures for effective light-emission 混合结构中有效发光的共振模式交叉

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

Photonics and Nanostructures-Fundamentals and Applications

Pub Date : 2025-09-01 DOI: 10.1016/j.photonics.2025.101436

Martin Rojas-Bustamante , Ruslan Azizov , Ravshanjon Nazarov , Mingzhao Song , Pavel S. Pankin , Dmitrii N. Maksimov , Sergey Makarov , Andrey Bogdanov

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.

连续介质中的束缚态（bic）是具有无限辐射质量因子的特定共振模式，它是通过对称保护、参数调谐或偶然简并机制与自由空间辐射不匹配而产生的。为了利用bic在发光应用（如led和激光器）中的巨大潜力，必须将发光纳米材料与基于bic的架构有效集成。在这里，我们数值模拟了发光封盖层对等离子体-光子混合系统的影响，该系统由具有二维周期波状界面的铝衬底和阳极氧化铝光子晶体板组成。我们考虑CdSe/CdS纳米薄片（NPLs）作为增益材料，因为它们具有很高的工业应用潜力。所提出的符合束缚态形成条件的实用指南，在光谱上与NPLs的光致发光带对齐，可以进一步用于高性能溶液可加工激光器的实验实现。

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引用次数: 0