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Broadband antenna array realization with printed meta-elements and its multipoles spectra 用印刷元元件实现宽带天线阵列及其多极光谱
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-27 DOI: 10.1016/j.photonics.2023.101215
Vladimir D. Burtsev , Tatyana S. Vosheva , Sergey Y. Prokhorov , Anton A. Khudykin , Dmitry S. Filonov

A simulated and manufactured broadband antenna array of 2×2 meta-elements operating in the range of 2.5–4.5 GHz is presented. The characteristic size of the aperture of this sample is two wavelengths, but its realized gain exceeds 11.3 dBi in the entire range and reaches a peak of 14.3 dBi at the frequency of 3.2 GHz. Such results become possible by the successful combining electric and magnetic multipoles of the meta-elements, slightly spaced in frequency. As a trade off in accuracy and manufactring costs we use additive manufacturing: 3D printing of meta-elements on a photopolymer printer and subsequent metallization of their surface were involved in the manufacture of the antenna array.

提出了一种模拟制造的2x2元元宽带天线阵列,工作频率为2.5-4.5 GHz。该样品的孔径特征尺寸为两个波长,但其实现增益在整个范围内超过11.3 dBi,在3.2 GHz频率处达到峰值14.3 dBi。这种结果是通过将元元素的电和磁多极成功地结合在一起而成为可能的,这些元元素的频率略有间隔。为了权衡精度和制造成本,我们使用了增材制造:在光聚合物打印机上对元元素进行3D打印,随后对其表面进行金属化,这涉及到天线阵列的制造。
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引用次数: 0
Optical LC-like resonances in high-index particles 高折射率粒子的光学类lc共振
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-24 DOI: 10.1016/j.photonics.2023.101212
Xiang-yang Liu , Cheng-ping Huang

Electric LC resonances, occurring in metallic circuits, govern the motion of free electrons or electric signals. In this paper, optical LC-like resonances in high-index particles (HIPs) or dielectric LC resonances have been studied, which involve bounded electrons and optical fields instead. The resonance effect is dominated by optical analogues of inductance and capacitance, which can be determined according to the electromagnetic energy bounded near the particle. The viewpoint of dielectric optical circuit with equivalent parameters facilitates the understanding of dielectric resonance effect. The result also provides a method for studying the optical properties of the HIPs.

电子LC共振,发生在金属电路中,控制自由电子或电信号的运动。在本文中,我们研究了光学类lc共振,这种共振发生在高折射率粒子(HIPs)中,涉及到光学或电磁场。谐振效应主要由电感和电容的光学类似物主导,它们可以根据粒子附近的电磁能来确定。等效参数介质光电路的观点有助于理解介质谐振效应。该结果也为研究HIPs的光学特性提供了一种方法。
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引用次数: 0
Towards phased array antenna operating in Ku-band for satellite communications 卫星通信ku波段相控阵天线工作研究
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-24 DOI: 10.1016/j.photonics.2023.101216
Anton V. Nikulin , Aleksey N. Kosmynin , Vladimir D. Burtsev , Sergey Y. Prokhorov , Tatyana S. Vosheva , Dmitry S. Filonov

Satellite communication systems for mounting on vehicles are commonly based on phased array antennas with electronical beam steering. In this work we develop active metasurface-based receive-transmit antenna arrays for newly deployed satellite constellation system running in Ku-band. Both receive and transmit subarrays are based on patch-antenna elements driven in circular polarization using 90 hybrids. In both subarrays we optimized elements sizes and array period to have optimal ellipticity, gain, side lobe level. In electromagnetic simulations we achieved realized gain of 32.2 dBi for the Rx subarray and 33.4 dBi for the Tx subarray obtained in a broad scanning angle range from − 15 to + 45.

用于安装在车辆上的卫星通信系统通常基于带有电子波束转向的相控阵天线。在这项工作中,我们为新部署的ku波段卫星星座系统开发了基于主动超表面的收发天线阵列。接收和发射子阵都是基于贴片天线元件,在圆偏振下使用90°混合天线驱动。在这两个子阵列中,我们优化了元件尺寸和阵列周期,以获得最佳的椭圆度、增益和旁瓣电平。在电磁模拟中,我们在-15°到+45°的宽扫描角范围内实现了Rx子阵的32.2 dBi和Tx子阵的33.4 dBi增益。
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引用次数: 0
Interaction of microwaves with nanocomposites containing Fe particles 微波与含铁纳米复合材料的相互作用
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-24 DOI: 10.1016/j.photonics.2023.101214
D.V. Perov , E.A. Kuznetsov , A.B. Rinkevich , O.V. Nemytova , M.A. Uimin

Transmission of microwaves through a composite plate containing Fe nanoparticles in an epoxyamine matrix, as well as reflection of waves from it, has been investigated. The experiments were performed at the frequencies from 26 to 38 GHz in the magnetic fields up to 12 kOe. The ferromagnetic resonance line in the composites with the weight fraction of Fe particles from 10% to 30% has been studied. The magnetic field dependence of the microwave power dissipation has been plotted. Field dependence of the transmission and reflection coefficients have been calculated, as well as qualitative, and in some cases quantitative, agreement has been obtained. The penetration depth of microwaves into the composites has been analyzed. Spectrum of the FMR has been constructed. Results of interaction of microwaves with Fe nanoparticles are discussed taking into account magnetic properties and composite structure.

研究了微波在含铁纳米颗粒的环氧胺基复合板中的传输,以及微波在该复合板中的反射。实验频率为26 ~ 38 GHz,磁场强度为12 kOe。研究了铁颗粒质量分数为10% ~ 30%的复合材料的铁磁共振谱线。绘制了微波功率耗散与磁场的关系图。对透射系数和反射系数的场依赖性进行了计算,并在定性和定量的情况下得到了一致的结果。分析了微波对复合材料的穿透深度。构建了FMR的谱图。考虑了铁纳米粒子的磁性和复合结构,讨论了微波与铁纳米粒子相互作用的结果。
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引用次数: 0
Metamaterial-inspired absorber for GNSS and 5G pioneer spectrum band: Achieving narrow bandwidth, wide incidence angle, and polarization agnostic 受超材料启发的吸收器,用于全球导航卫星系统和 5G 先锋频段:实现窄带宽、宽入射角和极化无关性
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-23 DOI: 10.1016/j.photonics.2023.101210
Mayank A. Ardeshana , Falgunkumar N. Thakkar , Sunayana G. Domadia

The recent emergence of electromagnetic (EM) metamaterial absorbers (MAs) with exceptionally high absorption rates has captured the interest of numerous researchers. This study introduces an innovative design for a dual-band microwave absorber, inspired by metamaterial concepts. A square ring resonator, a second ring resonator with splits at each of its four corners, and a third ring resonator created by joining two I-shaped pieces make up the unit cell, which has the dimensions 25.5×25.5×2.54mm3. These resonators are realized on a metal-backed FR-4 substrate, a common dielectric material found in printed circuit boards. The primary objective of this absorber's configuration is to achieve remarkable absorption peaks at 1.55 GHz and 3.3 GHz, attaining absorption levels of 99.73% and 99.41%, respectively. Notably, the design is insensitive to polarization and exhibits a broad incidence angle of up to 60°. It maintains high absorption rates of 95% for the transverse electric mode and 94% for the transverse magnetic mode. In order to optimize the suggested design, parametric studies were carried out for unit cell design by varying the split gap, loss tangent, and various types of metal. The advanced design system (ADS) software was used to assess an equivalent circuit, and the results of the CST simulation were compared with the circuit, confirming good agreement. These attributes are well-suited for efficiently absorbing signals within specific frequency ranges, catering to the demands of applications such as Global Navigation Satellite Systems (GNSS) and the pioneering 5G frequency band. Simulation and measured results of the absorber closely align with the expected performance, affirming the efficacy of the design. In essence, this solution provides an effective means of absorbing electromagnetic waves in these defined frequency ranges, rendering it highly suitable for diverse wireless communication and navigation systems.

最近出现的具有超高吸收率的电磁超材料吸收器(MAs)引起了众多研究人员的兴趣。本研究受超材料概念的启发,介绍了一种双频微波吸收器的创新设计。单元尺寸为 25.5×25.5×2.54mm3 ,由一个正方形环形谐振器、一个四角均有分叉的第二个环形谐振器和一个由两个工字形部件连接而成的第三个环形谐振器组成。这些谐振器是在金属背衬的 FR-4 基板上实现的,FR-4 是印刷电路板中常见的一种介电材料。这种吸收器配置的主要目的是在 1.55 GHz 和 3.3 GHz 实现显著的吸收峰值,吸收率分别达到 99.73% 和 99.41%。值得注意的是,该设计对极化不敏感,入射角宽达 60°。它对横向电模式和横向磁模式分别保持了 95% 和 94% 的高吸收率。为了优化所建议的设计,我们通过改变分裂间隙、损耗正切和各种金属类型,对单胞设计进行了参数研究。使用高级设计系统 (ADS) 软件评估了等效电路,并将 CST 仿真结果与电路进行了比较,证实两者吻合良好。这些特性非常适合在特定频率范围内有效吸收信号,以满足全球导航卫星系统(GNSS)和开创性的 5G 频段等应用的需求。吸收器的仿真和测量结果与预期性能非常吻合,证实了设计的有效性。从本质上讲,该解决方案提供了在这些确定频率范围内吸收电磁波的有效方法,使其非常适合各种无线通信和导航系统。
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引用次数: 0
Adjustable broadband absorber based on vanadium dioxide multiple coupled diagonally sliced square ring shaped structure for THz frequency 基于二氧化钒多重耦合对角切片方形环形结构的可调宽带太赫兹频率吸收器
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-23 DOI: 10.1016/j.photonics.2023.101211
Pankaj Binda , Sagnik Banerjee , Rajendra Mitharwal , Sarita Nanda

A broadband absorber with multiple coupled diagonally sliced square rings at terahertz frequency using vanadium dioxide is proposed. The proposed structure exhibits more than 90 % absorption in the frequency range of 2.85–7.51 THz, with a relative bandwidth of 89.96 % and an absorption bandwidth of 4.66 THz. The absorptivity curve increases as vanadium dioxide conductivity rises from 200 S/m to 200,000 S/m, giving a wide range of tunability from 1.62 % to 100 % at 3.4 THz. Due to its geometrical symmetry, the proposed structure is independent of the polarization angle under normal incident plane waves. The proposed structure works for different incident angles for transverse electric (TE) mode and transverse magnetic (TM) mode with oblique incidence plane waves. The results demonstrate the broad bandwidth compared to the state-of-the-art designs within the same frequency band with potential applications in sensors, switches, tuning, and modulation in the terahertz range.

提出了一种以二氧化钒为材料,在太赫兹频率下具有多个耦合对角切片方形环的宽带吸收器。该结构在2.85 ~ 7.51 THz频率范围内具有90%以上的吸收率,相对带宽为89.96%,吸收带宽为4.66 THz。当二氧化钒的电导率从200s /m增加到200s /m时,吸收曲线增加,在3.4 THz下可调范围从1.62%到100%。由于其几何对称性,该结构在平面波入射下与偏振角无关。该结构适用于斜入射平面波的横向电模式和横向磁模式的不同入射角。结果表明,在相同的频带内,与最先进的设计相比,宽频带具有在太赫兹范围内的传感器、开关、调谐和调制方面的潜在应用。
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引用次数: 0
Memristive behavior of UiO-66 metal-organic framework single crystal UiO-66金属-有机骨架单晶的记忆行为
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-19 DOI: 10.1016/j.photonics.2023.101206
Semyon V. Bachinin , Anastasia Lubimova , Svyatoslav A. Povarov , Dmitrii Zubok , Elizaveta Okoneshnikova , Alena N. Kulakova , Sergey S. Rzhevskiy , Valentin A. Milichko

Metal–organic frameworks (MOFs) have recently emerged as a new class of scalable and low energy consumptive materials for microelectronic applications. Here, we experimentally extend the list of MOFs with memristive behavior for electronic data storage. Using 15 µm single crystals of UiO-66 located in 10 µm gap between Au contacts, we demonstrate an electronic set/reset process upon 15 kV cm−1 of an electric field strength under normal conditions. Such low-energy data recording together with an endurance of more than 7 cycles for set/reset opens up prospects for the design of MOF-based electronic and opto-electronic devices.

金属有机框架(mof)是近年来出现的一类新型可扩展和低能耗的微电子应用材料。在这里,我们通过实验扩展了具有记忆行为的mof列表,用于电子数据存储。使用15µm的UiO-66单晶位于Au触点之间10µm的间隙中,我们演示了在正常条件下电场强度为15 kV cm−1的电子设置/复位过程。这种低能量的数据记录以及超过7个设置/重置周期的持久时间为基于mof的电子和光电器件的设计开辟了前景。
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引用次数: 0
Large-period plasmonic grating with sinusoidal profile for monitoring water quality with high sensitivity 用于高灵敏度水质监测的大周期正弦型等离子体光栅
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-17 DOI: 10.1016/j.photonics.2023.101199
Vaswati Biswas , R. Vijaya

Subwavelength-thick modulation of surface profile of a dielectric layer combined with a nanometer-thick metallic coating on it can be used for highly sensitive refractive index sensing using the concept of surface plasmon resonance. The performance efficiency of a 1D sinusoidal plasmonic grating of higher periodicity made of polymethylmethacrylate with gold coating on it is evaluated for monitoring water quality. The sinusoidal structure is fabricated by the cost-effective soft imprint lithography technique using a commercially available compact disk as master. Even though the master has a step profile, the solution-based technique aids in achieving the sinusoidal profile. The higher periodicity aids in attaining a higher sensitivity of 1533 nm/RIU at normal incidence and also provides a broad wavelength detection regime that can be controlled by the incidence angle. As the sinusoidal grating supports only the fundamental mode of the surface plasmon, it allows for more precise detection of any analyte. The optimized parameters for the structure are obtained through finite element method calculation.

利用表面等离子体共振的概念,结合纳米厚金属涂层对介电层表面轮廓进行亚波长厚调制,可用于高灵敏度折射率传感。评价了涂金的聚甲基丙烯酸甲酯制备的高周期性一维正弦等离子体光栅用于水质监测的性能效率。正弦波结构是采用廉价的软压印光刻技术,以市售光盘为主要材料制成的。即使大师有一个阶梯的轮廓,解决方案为基础的技术有助于实现正弦轮廓。较高的周期性有助于在正常入射角下获得1533 nm/RIU的更高灵敏度,并且还提供了可以通过入射角控制的宽波长检测范围。由于正弦光栅只支持表面等离子体的基本模式,它允许更精确地检测任何分析物。通过有限元法计算得到结构的优化参数。
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引用次数: 0
UiO-66 metal organic framework as stable platform for non-linear optical applications UiO-66金属有机框架作为非线性光学应用的稳定平台
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-07 DOI: 10.1016/j.photonics.2023.101198
Nikolaj Zhestkij , Svyatoslav Povarov , Yuri A. Mezenov , Sergey S. Rzhevskiy , Alena N. Kulakova , Valentin A. Milichko

We report on the experimental study the non-linear optical properties of UiO-66 metal-organic framework with high thermal and chemical stability. We demonstrate the coherent conversion of high-intensity incoming radiation into the third harmonics ranging from 450 to 600 nm. Moreover, eclipse z - scan of single UiO-66 microcrystals made it possible to determine the saturable absorption coefficient (βeff = −1.415·10-2 cm/GW at 515 nm and −3.865·10-1 cm/GW at 1030 nm), thereby, bringing UiO-66 to the list of nonlinear and stable MOFs for real-life photonic applications.

本文报道了具有高热稳定性和化学稳定性的UiO-66金属有机骨架的非线性光学性质的实验研究。我们演示了高强度入射辐射到450至600 nm范围内的三次谐波的相干转换。此外,通过对单个uui -66微晶的蚀z扫描,可以确定其饱和吸收系数(βeff = - 1.415·10-2 cm/GW,在515 nm处为- 1.415·10-2 cm/GW,在1030 nm处为- 3.865·10-1 cm/GW),从而使uui -66成为实际光子应用的非线性稳定mof。
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引用次数: 1
A dynamically switchable metamaterial device with multiple functions based on vanadium dioxide 基于二氧化钒的多功能动态切换超材料器件
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-04 DOI: 10.1016/j.photonics.2023.101197
Mengting Ma , Xuejun Lian , Jinping Tian , Rongcao Yang

Based on the phase transition properties of vanadium dioxide (VO2), a metamaterial device is designed in this paper, which can achieve multiple switchable functions. When VO2 is in the metallic state, the proposed device can realize broadband absorption with peak absorbance more than 90 % in the frequency range of 2.40–6.73 THz and broadband linear polarization conversion (LPC) with polarization conversion ratio (PCR) greater than 90% in the range of 1.80–4.21 THz, respectively, depending on whether the incidence of terahertz (THz) electromagnetic (EM) wave is from top side or bottom side. When VO2 is in the insulated state, the proposed device can achieve LPC of half-reflection and half-transmission (HRHT) and transmissive linear-to-circular (LTC) polarization conversion. The study in this paper has guiding significance in the design of THz metamaterial devices with multiple functions.

基于二氧化钒(VO2)的相变特性,本文设计了一种超材料器件,该器件可以实现多种可切换功能。当VO2处于金属态时,所提出的器件可以分别在2.40–6.73 THz的频率范围内实现峰值吸光度大于90%的宽带吸收和在1.80–4.21 THz的范围内实现偏振转换率大于90%的宽频带线性偏振转换(LPC),取决于太赫兹(THz)电磁(EM)波的入射是从顶侧还是从底侧。当VO2处于绝缘状态时,所提出的器件可以实现半反射半透射(HRHT)的LPC和透射线性到圆(LTC)偏振转换。本文的研究对设计具有多种功能的太赫兹超材料器件具有指导意义。
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引用次数: 0
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