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Perfect nonradiating electromagnetic source and its self-action 完善的无辐射电磁源及其自动性
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-03 DOI: 10.1016/j.photonics.2023.101195
Denis Nikolaevich Sob’yanin Денис Николаевич Собьянин

Nonradiating sources and anapoles are curious objects from the physics of invisibility that illuminate subtle concepts of fundamental electrodynamics and have promising applications in nanophotonics. The present work shows that a perfectly conducting sphere with a hidden magnetic field is a simple nonradiating electromagnetic source with mechanical excitation and complete internal confinement of electromagnetic energy. It does not require external electromagnetic excitation and is excited by rotation, which induces internal charges and currents with a self-compensating external radiation. The constructed source acts on itself through Lorentz forces emerging from the interaction of charges and currents with electromagnetic fields inside the sphere and, when having a freedom of rotation about the fixed center, exhibits regular precession like a gyroscope. This self-action reveals an internal electromagnetic activity of the perfect nonradiating source, externally inactive and invisible. Neutron stars, these nanospheres of space, can be such natural nonradiating sources when their magnetic fields are buried.

非辐射源和类似点是来自不可见物理学的奇特物体,它们阐明了基本电动力学的微妙概念,并在纳米光子学中具有很好的应用前景。本文的工作表明,具有隐藏磁场的完全导电球是一种简单的无辐射电磁源,具有机械激励和完全的电磁能量内约束。它不需要外部电磁激励,而是通过旋转激发,通过自补偿的外部辐射诱导内部电荷和电流。构建的源通过洛伦兹力作用于自身,这些力是由球体内的电荷和电流与电磁场相互作用产生的,并且当围绕固定中心旋转时,表现出像陀螺仪一样的规则进动。这种自我作用揭示了一个完美的非辐射源的内部电磁活动,外部不活跃和不可见。中子星,这些空间的纳米球体,当它们的磁场被掩埋时,可以成为这样的天然非辐射源。
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引用次数: 0
Fabrication technique for low-loss plasmonic waveguides incorporating both “plasmonic-friendly” and “plasmonic-unfriendly” metals 结合“等离子体友好型”和“等离子体不友好型”金属的低损耗等离子体波导制造技术
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-02 DOI: 10.1016/j.photonics.2023.101196
Vadym Zayets , Iryna Serdeha , Valerii Grygoruk

Fabrication technology, which allows a substantial decrease of the plasmonic propagation loss for both “plasmon- friendly” metals like Au, Cu or Al and “plasmon- unfriendly” metals like Co, Fe or Cr, has been developed and experimentally demonstrated. Optimization of the optical confinement is used to reduce the propagation loss below 1 dB per plasmonic device.

制造技术,使“等离子体友好”金属如Au, Cu或Al和“等离子体不友好”金属如Co, Fe或Cr的等离子体传播损失大幅降低,已经开发和实验证明。通过优化光约束,将每个等离子体器件的传输损耗降低到1 dB以下。
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引用次数: 0
Promoting second-harmonic generation in the LiNbO3 film combined with metasurface using plasmonic quasi bound states in the continuum 利用连续介质中的等离子体准束缚态促进与超表面结合的LiNbO3膜中的二次谐波产生
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-17 DOI: 10.1016/j.photonics.2023.101194
Yao Ju , Wei Zhang , Haoyi Zuo

Metasurfaces have become a fascinating framework for nonlinear optics, with the advantages of a compact footprint and unprecedented flexibility to manipulate light. However, further advancements are necessary to enhance the efficiency of metasurfaces in nonlinear devices. Here, a novel approach for second harmonic generation (SHG) based on the LiNbO3 metasurface using leaked plasmonic bound states in the continuum (BIC) is proposed. The behavior of SHG in the guided mode resonance (GMR) under TE polarization and plasmonic modes under TM polarization is investigated. The structure consists of a plasmonic grating overlying a nonlinear lithium niobate dielectric waveguide layer that supports two different BIC, namely plasmonic BIC and GMR BIC. The evolution of second harmonics generation(SHG) near two groups of BIC is explored. The SHG of the plasmonic quasi-BIC is stronger than that based on the GMR quasi-BIC. In addition, the plasmonic accidental quasi-BIC produces stronger harmonic effects than the quasi-BIC based on symmetry-broken. Specifically, at a pump intensity of 30 MW/cm2, this accidental quasi-BIC results in SHG efficiency of 1.86 × 10−3. This work provides a valuable approach to achieving enhanced SHG using plasmonic and BIC. It opens up new possibilities for the utilization of LiNbO3 in integrated nonlinear nanophotonics and paves the way for the development of advanced nonlinear photonic devices.

超表面已经成为非线性光学的一个迷人框架,具有占地面积小和操纵光的前所未有的灵活性的优点。然而,需要进一步的进步来提高非线性器件中元表面的效率。在这里,提出了一种基于LiNbO3超表面的利用连续介质中泄漏的等离子体结合态(BIC)的二次谐波产生(SHG)的新方法。研究了在TE偏振和TM偏振下,SHG在导模共振(GMR)中的行为。该结构由覆盖在非线性铌酸锂介电波导层上的等离子体光栅组成,该波导层支持两种不同的BIC,即等离子体BIC和GMR-BIC。探讨了两组BIC附近二次谐波发生的演化过程。等离子体准BIC的SHG比基于GMR的准BIC更强。此外,等离子体偶然准BIC比基于对称性破坏的准BIC产生更强的谐波效应。具体而言,在30 MW/cm2的泵浦强度下,这种偶然的准BIC导致SHG效率为1.86×10−3。这项工作为使用等离子体激元和BIC实现增强SHG提供了一种有价值的方法。它为LiNbO3在集成非线性纳米光子学中的应用开辟了新的可能性,并为开发先进的非线性光子器件铺平了道路。
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引用次数: 0
Four-input acoustic XOR logic gate based on solid-solid phononic crystals 基于固体-固体声子晶体的四输入声学异或逻辑门
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-14 DOI: 10.1016/j.photonics.2023.101192
Farhad Hosseinpour Asgharkhani, Ali Bahrami

The paper introduces a 2D square lattice phononic crystal structure, with a nylon matrix and molybdenum rods as inclusions. Initially, a new type of resonator, called a triangle resonator, was designed, each of which acts as a two-input acoustic XOR logic gate. Then, a four-input acoustic XOR logic gate is presented by combining these resonators. Simulation results indicate that the realization of two-input and four-input acoustic XOR logic gates is possible using the structures we have proposed. In order to analyze the proposed acoustic XOR logic gates, the transmission spectrum is calculated using the finite element method (FEM).

本文介绍了一种以尼龙基体和钼棒为夹杂物的二维方晶格声子晶体结构。最初,设计了一种新型谐振器,称为三角形谐振器,每个谐振器都充当两输入声学XOR逻辑门。然后,通过组合这些谐振器,提出了一个四输入声学异或逻辑门。仿真结果表明,使用我们提出的结构可以实现两输入和四输入声学XOR逻辑门。为了分析所提出的声学XOR逻辑门,使用有限元方法计算了传输谱。
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引用次数: 0
Localized surface plasmon resonance properties dependence of green-synthesized Fe3O4/Ag composite nanoparticles on Ag concentration and an electric field for biosensor application 绿色合成Fe3O4/Ag复合纳米颗粒的局域表面等离子体共振特性与Ag浓度和电场的关系
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-13 DOI: 10.1016/j.photonics.2023.101191
Sari Wahyuni , Muhammad Riswan , Nanang Adrianto , Mahardika Yoga Dharmawan , Rivaldo Marsel Tumbelaka , Rona Cuana , Nurul Imani Istiqomah , Adhistinka Jiananda , Shania Garcia , Edi Suharyadi

The use of green-synthesized Fe3O4/Ag composites nanoparticles (NPs) on the surface plasmon resonance (SPR) system induced by the electric field generates the effect of electrooptic-localized surface plasmon resonance (EO-LSPR). EO-LSPR is the promising method to increase dispersibility, generate plasmons, bind to biomolecular targets, modify the refractive index, and increase the SPR signal. Green synthesis of Fe3O4/Ag NPs has several advantages, including being environmentally friendly, cost-effective, and sustainable. This research successfully investigated the EO-LSPR properties of green-synthesized Fe3O4/Ag NPs with various Ag concentrations. Green synthesis of Fe3O4/Ag composites NPs was prepared utilizing Moringa oleifera by an aqueous solution method. The EO-LSPR phenomenon was investigated by applying various voltages in the Kretschmann configuration with a layer arrangement of a prism/Au thin film/NPs/air with a wavelength of 632.8 nm. Transmission electron microscope results show that the average size of Fe3O4/Ag particles is around 16.72 ± 7.30 nm. The scanning electron microscopy-energy dispersive x-ray results showed that Ag was distributed on the surface of Fe3O4. The addition of Ag concentration decreased the saturation magnetization while the coercivity field increased. The SPR angle of the prism/Au thin film/air layer structures is 44.66°. After depositing with Fe3O4/Ag with an Ag concentration of 60 millimolar, the LSPR angle shifted by 0.98°. Under an electric field, the LSPR angle shifted to 1.00°, 1.17°, and 1.22° of 2 volts, 4 volts, and 6 volts, respectively. The results show that applying the electric field induces the LSPR angle of Fe3O4/Ag NPs to shift to a larger angle. Applying an electric field causes a change in the material's refractive index. The greater the applied electric field, the more significant the LSPR angle shifts. The significant shifts in the LSPR angle due to the application of an electric field indicate that the EO-LSPR system using green-synthesized Fe3O4/Ag composites NPs could be a promising alternative to increase the performance of SPR biosensors in the future.

在电场诱导的表面等离子体共振(SPR)系统上使用绿色合成的Fe3O4/Ag复合纳米颗粒(NP)产生了电光局域表面等离子体共振的效应。EO-LSPR是一种很有前途的方法,可以提高分散性,产生等离子体,与生物分子靶结合,改变折射率,增加SPR信号。Fe3O4/Ag纳米颗粒的绿色合成具有几个优点,包括环保、成本效益和可持续性。本研究成功地研究了不同Ag浓度下绿色合成的Fe3O4/Ag纳米颗粒的EO-LSPR性能。以辣木为原料,采用水溶液法制备了绿色合成Fe3O4/Ag复合纳米颗粒。通过在Kretschmann结构中施加不同电压,研究了EO-LSPR现象,该结构具有632.8nm的棱镜/Au薄膜/NPs/空气层排列。透射电子显微镜结果表明,Fe3O4/Ag颗粒的平均尺寸约为16.72±7.30nm分布在Fe3O4表面。Ag浓度的增加降低了饱和磁化强度,而矫顽力场增加。棱镜/Au薄膜/空气层结构的SPR角为44.66°。用Ag浓度为60毫摩尔的Fe3O4/Ag沉积后,LSPR角移动了0.98°。在电场作用下,LSPR角度分别移动到2伏、4伏和6伏的1.00°、1.17°和1.22°。结果表明,施加电场会使Fe3O4/Ag纳米颗粒的LSPR角向更大的角度移动。施加电场会使材料的折射率发生变化。施加的电场越大,LSPR角度偏移就越显著。由于电场的应用,LSPR角的显著变化表明,使用绿色合成的Fe3O4/Ag复合纳米颗粒的EO-LSPR系统可能是未来提高SPR生物传感器性能的一种很有前途的替代方案。
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引用次数: 0
Improved device performance of interband cascade lasers with hybrid cladding layers operating in the 3–4 µm wavelength region 具有在3–4µm波长区域工作的混合包层的带间级联激光器的器件性能得到改善
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-13 DOI: 10.1016/j.photonics.2023.101193
Yixuan Shen , Jeremy A. Massengale , Rui Q. Yang , Tetsuya D. Mishima , Michael B. Santos

In this work, we briefly review the development and status of interband cascade lasers (ICLs) as related to long-standing issues due to the InAs/AlSb superlattice cladding. By focusing on a hybrid cladding approach to alleviate these issues, we demonstrate substantially improved device performance of ICLs compared to earlier reported ICLs of a similar design in the 3–4 µm wavelength region. These improvements include a threshold current density for broad-area devices as low as 134 A/cm2 at 300 K and reduced threshold voltage with a peak voltage efficiency of 80%, which is more than 10% higher than that obtained from previously reported ICLs. Moreover, we have demonstrated continuous wave (cw) operation of a broad-area device up to 278 K, the highest cw operating temperature among epi-side up mounted broad-area type-II ICLs, implying improved thermal dissipation with the hybrid cladding approach. Additionally, by conducting a comparative study of ICLs with different GaSb layer thicknesses in the hole injector, we reveal and discuss an interesting correlation between the carrier transport, threshold voltage, and hole-induced absorption loss, which may help to guide device optimization for operation in a targeted temperature range.

在这项工作中,我们简要回顾了带间级联激光器(ICL)的发展和现状,这些激光器与InAs/AlSb超晶格包层引起的长期问题有关。通过专注于混合包层方法来缓解这些问题,我们证明了与早期报道的类似设计的ICL相比,ICL在3-4µm波长区域的器件性能显著提高。这些改进包括在300K下宽面积器件的阈值电流密度低至134A/cm2,并且降低了阈值电压,峰值电压效率为80%,这比从先前报道的ICL获得的峰值电压效率高出10%以上。此外,我们已经证明了宽面积器件的连续波(cw)操作高达278K,这是外延侧上安装的宽面积II型ICL中最高的连续波操作温度,这意味着混合包层方法改善了散热。此外,通过对空穴注入器中具有不同GaSb层厚度的ICL进行比较研究,我们揭示并讨论了载流子输运、阈值电压和空穴诱导吸收损耗之间的有趣相关性,这可能有助于指导器件在目标温度范围内的优化操作。
{"title":"Improved device performance of interband cascade lasers with hybrid cladding layers operating in the 3–4 µm wavelength region","authors":"Yixuan Shen ,&nbsp;Jeremy A. Massengale ,&nbsp;Rui Q. Yang ,&nbsp;Tetsuya D. Mishima ,&nbsp;Michael B. Santos","doi":"10.1016/j.photonics.2023.101193","DOIUrl":"https://doi.org/10.1016/j.photonics.2023.101193","url":null,"abstract":"<div><p>In this work, we briefly review the development and status of interband cascade lasers (ICLs) as related to long-standing issues due to the InAs/AlSb superlattice cladding. By focusing on a hybrid cladding approach to alleviate these issues, we demonstrate substantially improved device performance of ICLs compared to earlier reported ICLs of a similar design in the 3–4 µm wavelength region. These improvements include a threshold current density for broad-area devices as low as 134 A/cm<sup>2</sup> at 300 K and reduced threshold voltage with a peak voltage efficiency of 80%, which is more than 10% higher than that obtained from previously reported ICLs. Moreover, we have demonstrated continuous wave (cw) operation of a broad-area device up to 278 K, the highest cw operating temperature among epi-side up mounted broad-area type-II ICLs, implying improved thermal dissipation with the hybrid cladding approach. Additionally, by conducting a comparative study of ICLs with different GaSb layer thicknesses in the hole injector, we reveal and discuss an interesting correlation between the carrier transport, threshold voltage, and hole-induced absorption loss, which may help to guide device optimization for operation in a targeted temperature range.</p></div>","PeriodicalId":49699,"journal":{"name":"Photonics and Nanostructures-Fundamentals and Applications","volume":"57 ","pages":"Article 101193"},"PeriodicalIF":2.7,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"50187221","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}
引用次数: 0
Coupled nano-squares with optical response in nonlinear modes; Suitable substrate to control light by light for quantum applications 非线性模式下具有光学响应的耦合纳米正方形;适用于量子应用的光控制基板
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-10-11 DOI: 10.1016/j.photonics.2023.101190
Sepehr Razi , Mahdi Khalili Hezarjaribi , Mahmoud Mollabashi

Nonlinear response of a nano-structure including two square quantum dots (QDs) of identical material but dissimilar sizes is discussed by considering possible quantum interferences. Density matrix approach is developed to extract physical characteristics of the system by considering Hamiltonians including couplings of the excitons to thermal bath and the possible intra-dot relaxations as well as the near field optical energy transfers (of Yukawa-type potentials) between the probable eight quantum states in subwavelength range. Realization of nonlinear behavior is studied systematically by putting the structure inside a unidirectional ring cavity and driving it by pair of dichromatic fields, that one provides a weak probe, while the other offers a strong driving component. It is shown that the absorption/dispersion properties of the probe field might be controlled by tuning the quantum interference via changing the structural features as well as the externally controlled parameters. Thus adjusting the optical bistability (OB) threshold, hysteresis cycle size or even transition from OB to multi-stability might be possible easily. Moreover, machine learning approach is proposed to evaluate how predictable are the responses of the suggested structure in various preliminary circumstances. Results clearly reflect high potential of the suggested structure for applications such as all-optical switches or memories.

通过考虑可能的量子干扰,讨论了包括两个相同材料但不同尺寸的方形量子点的纳米结构的非线性响应。密度矩阵方法是通过考虑哈密顿量来提取系统的物理特性的,哈密顿量包括激子与热浴的耦合和可能的点内弛豫,以及亚波长范围内可能的八个量子态之间的近场光能转移(Yukawa型势)。系统地研究了非线性行为的实现,方法是将结构放入单向环形腔中,并由一对双色场驱动,其中一个提供弱探针,而另一个提供强驱动组件。研究表明,探针场的吸收/色散特性可以通过改变结构特征和外部控制的参数来调节量子干涉来控制。因此,调整光学双稳态(OB)阈值、滞后周期大小甚至从OB到多稳定性的转变可能是容易的。此外,提出了机器学习方法来评估在各种初步情况下所建议的结构的响应的可预测性。结果清楚地反映了所建议的结构在诸如全光开关或存储器之类的应用中的高潜力。
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引用次数: 0
Smallest form-factor multi-stacked ceramic patch antenna on package for 5G millimeter-wave mobile applications 用于5G毫米波移动应用的封装上最小形状因数的多层陶瓷贴片天线
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-09-30 DOI: 10.1016/j.photonics.2023.101189
Sung Yong An, Boumseock Kim

A new design for a 5G millimeter-wave array antenna that is only 2.8 mm wide, using multi-stacked high-temperature ceramic substrates, is proposed in this paper. The antenna is designed to meet the requirements for esthetically pleasing and ergonomic smartphone designs and efficient component installations. To overcome challenges posed by the high relative permittivity and dielectric loss tangent of the ceramic substrates, the authors use a polymer adhesion layer with an air cavity and U-shaped probe feeding structures. The resulting 1 × 5 ceramic array antenna has a −10 dB impedance bandwidth in the low-band range of 24.25–28.35 GHz and the high-band range of 37–40 GHz, which covers the 5G New Radio frequency ranges n258, n260, and n261.

本文提出了一种新的5G毫米波阵列天线设计方案,该天线宽度仅为2.8毫米,采用多层高温陶瓷衬底。该天线旨在满足美观、符合人体工程学的智能手机设计和高效组件安装的要求。为了克服陶瓷衬底的高相对介电常数和介电损耗正切带来的挑战,作者使用了具有空气腔和U形探针馈电结构的聚合物粘合层。由此产生的1×5陶瓷阵列天线在24.25–28.35 GHz的低频段和37–40 GHz的高频段具有−10 dB的阻抗带宽,覆盖了5G新无线电频率范围n258、n260和n261。
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引用次数: 0
2D compound structures with deep subwavelength period on silicon fabricated by double time delayed femtosecond laser beams 双延时飞秒激光在硅表面制备深亚波长周期二维复合结构
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-09-29 DOI: 10.1016/j.photonics.2023.101188
Kang Jin , Nan Zhang , Wei Wang , Yongjian Hao , Bing Liu

In this work, two orthogonally polarized femtosecond laser beams are employed to irradiate a p-doped silicon wafer with an electrical resistivity of 0.008 Ω·cm. It is interesting to find that 2D compound structures composed of sub-wavelength periodic ripples and deep sub-wavelength nanodot array can be produced when proper laser fluence and time delay between the dual laser beams are used. The formation of the periodic ripples can be explained by the interference between the preceding incident laser and it induced surface plasmon polaritons (SPPs). The periodic nanodot array has a period down to ∼200 nm and the radius of the nanodot is ∼30 nm, most of which appear at the boundary between the ditch and ridge of the ripple. During the ripples’ formation, the residual melting silicon is most probably located at the boundary between the ditch and ridge of the ripple. Furthermore, the period of the nanodot array is roughly equal to the perimeter of the nanodot. Therefore, it is considered that the dot array may be generated due to the Rayleigh-Taylor instability of the melting silicon. It is also noted that these nanodots are all uniformly arranged along vertical lines, indicating that the subsequent incident laser may break the stochastic characteristic of the Rayleigh-Taylor instability and produce the 2D periodic dot array. The thermo-hydrodynamical process combined with the interference effect between SPPs and the incident laser can benefit the formation of complex surface structures with versatile functions.

本文采用两束正交偏振飞秒激光照射电阻率为0.008Ω·cm的p掺杂硅晶片。有趣的是,当使用适当的激光注量和双激光束之间的时间延迟时,可以产生由亚波长周期性波纹和深亚波长纳米点阵列组成的二维复合结构。周期性波纹的形成可以通过先前入射激光与其诱导的表面等离子体激元(SPP)之间的干涉来解释。周期性纳米点阵列的周期低至~200nm,纳米点的半径为~30nm,其中大部分出现在波纹的沟和脊之间的边界处。在波纹的形成过程中,残留的熔融硅很可能位于波纹的沟和脊之间的边界处。此外,纳米点阵列的周期大致等于纳米点的周长。因此,认为可能由于熔融硅的瑞利-泰勒不稳定性而产生点阵列。还注意到,这些纳米点都是沿着垂直线均匀排列的,这表明随后的入射激光可能会打破瑞利-泰勒不稳定性的随机特性,产生2D周期性点阵列。热流体动力学过程与SPP和入射激光之间的干涉效应相结合,有利于形成具有多种功能的复杂表面结构。
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引用次数: 0
Dual-core-enhanced surface plasmon resonance for sensing high refractive index liquid based on photonic crystal fiber 基于光子晶体光纤传感高折射率液体的双核增强表面等离子体共振
IF 2.7 3区 物理与天体物理 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-09-29 DOI: 10.1016/j.photonics.2023.101187
Yundan Xia, Kaiyan Bi, Yushuo Duan, Meijie Shi, Exian Liu

A dual-core photonic crystal fiber sensor based on surface plasmon resonance is theoretically proposed for the high-sensitive detection of high refractive index liquid analytes. Dual-core construction can effectively enhance the coupling effect between the fiber-core mode and the surface plasmon polariton modes, leading to sharp loss peaks at the resonance wavelengths. As the refractive index of the targeted analyte varies, the resonance condition will change as well and cause a certain shift of loss peak. Numeric results show that this dual-core fiber sensor exhibits an average linear sensitivity 9538 nm/RIU and a maximum sensitivity is 11400 nm/RIU with a resolution 8.77 × 10−6 RIU. The detected range is broad and covers the high refractive index range from 1.45 to 1.58 with an average figure of merit 284.5 RIU−1. The dependence of structure parameters and the thickness of coated-metal thin-film on sensing performance is performed systemically and suggests different responses. The proposed sensor is highly promising in detecting high refractive index liquid analytes in the fields of biological detection, environmental monitoring and chemical analysis.

理论上提出了一种基于表面等离子体共振的双核光子晶体光纤传感器,用于高折射率液体分析物的高灵敏度检测。双核结构可以有效地增强纤维芯模式和表面等离子体激元模式之间的耦合效应,导致在共振波长处出现尖锐的损耗峰值。随着目标分析物的折射率的变化,共振条件也会发生变化,并导致损失峰值发生一定的偏移。数值结果表明,该双芯光纤传感器的平均线性灵敏度为9538 nm/RIU,最大灵敏度为11400 nm/RIU,分辨率为8.77×10−6 RIU。检测范围很宽,覆盖了1.45至1.58的高折射率范围,平均品质因数为284.5 RIU−1。系统地研究了涂层金属薄膜的结构参数和厚度对传感性能的依赖性,并提出了不同的响应。所提出的传感器在生物检测、环境监测和化学分析领域检测高折射率液体分析物方面非常有前景。
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引用次数: 0
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