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Fabrication of 3D nano-hemispherical cavity array plasmonic substrate for SERS applications 用于SERS应用的三维纳米半球腔阵列等离子体衬底的制备
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2018-01-02 DOI: 10.1080/15599612.2018.1508528
Chu-Yu Huang, Ming-Shiuan Tsai
Abstract Surface-enhanced Raman scattering (SERS) have numerous applications in areas such as analytical chemistry, biochemistry, and environmental science. However to manufacture SERS active substrates with good reproducibility and low cost is not easy, which hinder the SERS technology from being widespread in various applications. In this study, we developed a batch producible hot embossing 3D nanostructured SERS substrate technology for SERS applications. This study utilized the anodic aluminum oxide (AAO) self-assembled uniform nano-hemispherical array barrier layer as a template to create a durable nanostructured nickel mold. With the hot embossing technique and the durable nanostructured nickel mold, we were able to batch produce the 3D Nanostructured SERS chip with consistent quality and low cost. In addition, according to the SERS experiments, the 3D nano-hemispherical cavity array combined with sub-10-nm-gaps Au NPs showed distinct SERS signals in both Rhodamine 6G and Chlorpyrifos measurements. Therefore, the developed method is good to be used extensively in rapid chemical and biomolecular detection applications.
摘要表面增强拉曼散射(SERS)在分析化学、生物化学和环境科学等领域有着广泛的应用。然而,制造具有良好再现性和低成本的SERS活性基底并不容易,这阻碍了SERS技术在各种应用中的广泛应用。在这项研究中,我们开发了一种可批量生产的热压花3D纳米结构SERS基底技术,用于SERS应用。本研究利用阳极氧化铝(AAO)自组装均匀的纳米半球阵列阻挡层作为模板,制作了一种耐用的纳米结构镍模具。凭借热压技术和耐用的纳米结构镍模具,我们能够批量生产质量稳定、成本低廉的3D纳米结构SERS芯片。此外,根据SERS实验,在罗丹明6G和毒死蜱的测量中,结合亚10nm-gaps Au NPs的3D纳米半球腔阵列显示出不同的SERS信号。因此,所开发的方法有利于在快速化学和生物分子检测应用中广泛应用。
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引用次数: 7
Dynamic response of ferrofluidic deformable mirrors using elastomer membrane and overdrive techniques 使用弹性体膜和过驱动技术的铁流体可变形反射镜的动态响应
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2018-01-02 DOI: 10.1080/15599612.2018.1465147
M. Rochette, E. Borra, Jean-Philippe Déry, A. Ritcey
Abstract The experimental results obtained with a ferrofluidic deformable mirror controlled by electro-magnet actuators are presented here. Using a step input through a single actuator, we obtained a steady-state settling time of 100 ms; however, different combinations of overdrive inputs can be used to decrease it to 25 ms. A new technique which consists of laying down an elastomer membrane, coated with an aluminum film, on the ferrofluid is also discussed. By adding the membrane on the ferrofluid, it further decreases the time response by a factor of 2. Furthermore, the thin aluminum layer improves the reflectivity of the mirror. Finally, using the membrane and the overdrive techniques combined, the time response is improved by a factor of 20. Numerical simulations show that ferrofluidic mirrors using membranes and improved electronics should reach settling times of the order of a millisecond. Presumably, even lower settling times could be possible.
本文介绍了用电磁驱动器控制的铁流体变形镜的实验结果。使用通过单个致动器的阶跃输入,我们获得了100的稳态稳定时间 太太然而,可以使用不同的过驱动输入组合将其减少到25 ms。还讨论了一种新技术,该技术包括在铁磁流体上铺设一层涂有铝膜的弹性体膜。通过在铁磁流体上添加膜,它将时间响应进一步降低了2倍。此外,薄铝层提高了反射镜的反射率。最后,将薄膜和超速驱动技术相结合,时间响应提高了20倍。数值模拟表明,使用膜和改进的电子器件的铁流反射镜应该达到一毫秒量级的沉降时间。据推测,甚至更低的沉降时间也是可能的。
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引用次数: 1
High-resolution optical inspection system for fast detection and classification of surface defects 用于表面缺陷快速检测和分类的高分辨率光学检测系统
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2018-01-02 DOI: 10.1080/15599612.2018.1444829
Ruifang Ye, Ming Chang, Chia-Sheng Pan, Cheng An Chiang, J. Gabayno
ABSTRACT A high-resolution automated optical inspection (AOI) system based on parallel computing is developed to achieve fast inspection and classification of surface defects. To perform fast inspection, the AOI apparatus is connected to a central computer which executes image processing instructions in a graphical processing unit. Defect classification is simultaneously implemented with Hu’s moment invariants and back propagation neural (BPN) approach. Experiments on touch panel glass show that using 100 training samples and 1000 cycle iterations in BPN, the accurate classification of surface defects for a 350 × 350 pixels image can be completed in less than 0.1 ms. Moreover, the inspection of a 43 mm × 229 mm sample that yields an 800 megapixel raw data can be completed remarkably fast in less than 3 s. Thus, the AOI system is capable of performing fast, reliable, and fully integrated inspection and classification equipment for in-line measurements.
摘要为了实现表面缺陷的快速检测和分类,开发了一种基于并行计算的高分辨率自动光学检测系统。为了执行快速检查,AOI设备连接到中央计算机,该中央计算机在图形处理单元中执行图像处理指令。缺陷分类是同时实现胡的矩不变量和反向传播神经(BPN)方法。在触摸板玻璃上的实验表明,使用100个训练样本和1000个 BPN中的循环迭代,350 × 350像素的图像可以在不到0.1ms的时间内完成。此外,对43 毫米 × 229 毫米样本产生8亿像素的原始数据,可以在不到3分钟的时间内非常快速地完成 因此,AOI系统能够执行快速、可靠和完全集成的在线测量检查和分类设备。
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引用次数: 17
Rigorous simulation of nonlinear optomechanical coupling in micro- and nano-structured resonant cavities 微纳米结构谐振腔中非线性光-力耦合的严格模拟
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2018-01-02 DOI: 10.1080/15599612.2018.1459977
M. Stocchi, D. Mencarelli, Y. Pennec, B. Djafari-Rouhani, L. Pierantoni
Abstract A numerical method aimed to predict the optomechanical dynamics in micro- and nano-structured resonant cavities is introduced here. The rigorousness of it is ensured by exploiting the harmonic version of the transformation optics (TO) technique and by considering all the energy-transduction contributions of electrostriction, radiation pressure, photoelasticity and moving boundaries. Since our full-wave approach implements a multi-modal analysis and also considers material losses, from both a mechanical and an optical point of view, a considerable step further has been made in respect to the standard optomechanical perturbative theory. The efficiency and the versatility of the strategy are tested by analysing the optomechanical behaviour of a corrugated Si-based nanobeam and comparing numerical results to experimental ones from the literature.
本文介绍了一种用于预测微纳结构谐振腔光力学动力学的数值方法。它的严格性是通过利用变换光学(TO)技术的谐波版本,并通过考虑电致伸缩、辐射压力、光弹性和移动边界的所有能量转换贡献来确保的。由于我们的全波方法实现了多模态分析,并从机械和光学的角度考虑了材料损耗,因此在标准的光机械微扰理论方面又向前迈出了相当大的一步。通过分析波纹硅基纳米束的光学力学行为,并将数值结果与文献中的实验结果进行比较,测试了该策略的效率和多功能性。
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引用次数: 3
Wavelength switchable and stable single-longitudinal-mode erbium-doped fiber laser based on Mach–Zehnder interferometer and tunable filter 基于Mach-Zehnder干涉仪和可调谐滤波器的波长可切换稳定单模掺铒光纤激光器
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2018-01-02 DOI: 10.1080/15599612.2018.1473539
W. He, Lianqing Zhu, M. Dong, Fei Luo
Abstract An erbium-doped fiber laser with all-fiber Mach–Zehnder interferometer (MZI) and tunable filter was proposed and experimentally demonstrated. In the designed fiber laser, 6 m C-band erbium-doped fiber was selected as a gain medium; the MZI comprised two waist-enlarged fiber bitapers. In the experiment, the laser threshold was 93 mW, whereas a switchable single-longitudinal-mode laser was realized within 1519.7–1564.6 nm by adjusting the tunable filter and the line interval was less than 2.5 nm; for single-wavelength laser, the peak power difference of each line was less than 4 dB, and the power fluctuation was less than 0.77 dB within 10-min scan time. A stable and switchable dual-wavelength laser was realized, the wavelength spacing of each dual-wavelength laser was less than 0.7 nm, the side-mode suppression ratio was more than 30.2 dB, and the power shift was less than 0.39 dB. The laser’s 3-dB linewidth was less than 0.1 nm.
摘要提出了一种采用全光纤马赫-曾德尔干涉仪和可调谐滤波器的掺铒光纤激光器,并进行了实验验证。在设计的光纤激光器中,选择6 m c波段掺铒光纤作为增益介质;MZI包括两个腰部增大的纤维咬人器。在实验中,激光阈值为93 mW,而通过调节可调谐滤波器,在1519.7 ~ 1564.6 nm范围内实现了可切换的单纵模激光,线间隔小于2.5 nm;对于单波长激光器,每条线的峰值功率差小于4 dB, 10 min扫描时间内的功率波动小于0.77 dB。实现了稳定可切换的双波长激光器,每个双波长激光器的波长间距小于0.7 nm,侧模抑制比大于30.2 dB,功率漂移小于0.39 dB。激光的3db线宽小于0.1 nm。
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引用次数: 6
Hyperspectral photoacoustic spectroscopy of highly-absorbing samples for diagnostic ocular imaging applications 用于诊断性眼部成像应用的高吸收样品的高光谱光声光谱
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2017-01-02 DOI: 10.1080/15599612.2017.1392661
H. Lim, V. M. Murukeshan
ABSTRACT Photoacoustic spectroscopy has been used to measure optical absorption coefficient and the application of tens of wavelength bands in photoacoustic spectroscopy was reported. Using optical methods, absorption-related information is, generally, derived from reflectance or transmittance values. Hence measurement accuracy is limited for highly absorbing samples where the reflectance or transmittance is too low to give reasonable signal-to-noise ratio. In this context, this paper proposes and illustrates a hyperspectral photoacoustic spectroscopy system to measure the absorption-related properties of highly absorbing samples directly. The normalized optical absorption coefficient spectrum of the highly absorbing iris is acquired using an optical absorption coefficient standard. The proposed concepts and the feasibility of the developed diagnostic medical imaging system are demonstrated using fluorescent microsphere suspensions and porcine eyes as test samples.
摘要光声光谱已被用于测量光吸收系数,并报道了数十个波段在光声光谱中的应用。使用光学方法,吸收相关信息通常是从反射率或透射率值得出的。因此,对于反射率或透射率太低而不能给出合理信噪比的高吸收样品,测量精度受到限制。在这种背景下,本文提出并说明了一种高光谱光声光谱系统,用于直接测量高吸收样品的吸收相关特性。使用光学吸收系数标准来获取高吸收虹膜的归一化光学吸收系数光谱。使用荧光微球悬浮液和猪眼睛作为测试样品,证明了所提出的概念和所开发的诊断医学成像系统的可行性。
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引用次数: 5
Fabrication of high quality factor lithium niobate double-disk using a femtosecond laser 利用飞秒激光制备高品质因数铌酸锂双盘
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2017-01-02 DOI: 10.1080/15599612.2017.1406024
Z. Fang, Ni Yao, Min Wang, Jintian Lin, Jianhao Zhang, Rongbo Wu, L. Qiao, W. Fang, T. Lu, Ya Cheng
ABSTRACT We demonstrate fabrication of a high-quality factor lithium niobate double-disk whispering-gallery microcavity using femtosecond laser assisted ion beam milling. Using this method, two vertically stacked 30-µm diameter disks with a 200-nm gap are fabricated. With our device, an optical quality factor as high as 1.35 × 105 is demonstrated. Our approach is scalable to fabricate multiple disks on a single chip.
摘要:我们展示了利用飞秒激光辅助离子束铣削制备高质量因数铌酸锂双盘低语廊微腔。利用该方法,制备了两个直径为30µm、间隙为200nm的垂直堆叠圆盘。利用我们的器件,证明了高达1.35 × 105的光学质量因子。我们的方法是可扩展的,可以在单个芯片上制造多个磁盘。
{"title":"Fabrication of high quality factor lithium niobate double-disk using a femtosecond laser","authors":"Z. Fang, Ni Yao, Min Wang, Jintian Lin, Jianhao Zhang, Rongbo Wu, L. Qiao, W. Fang, T. Lu, Ya Cheng","doi":"10.1080/15599612.2017.1406024","DOIUrl":"https://doi.org/10.1080/15599612.2017.1406024","url":null,"abstract":"ABSTRACT We demonstrate fabrication of a high-quality factor lithium niobate double-disk whispering-gallery microcavity using femtosecond laser assisted ion beam milling. Using this method, two vertically stacked 30-µm diameter disks with a 200-nm gap are fabricated. With our device, an optical quality factor as high as 1.35 × 105 is demonstrated. Our approach is scalable to fabricate multiple disks on a single chip.","PeriodicalId":50296,"journal":{"name":"International Journal of Optomechatronics","volume":"11 1","pages":"47 - 54"},"PeriodicalIF":5.5,"publicationDate":"2017-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/15599612.2017.1406024","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"60484822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 10
Micromirror-based real image laser automotive head-up display 基于微镜的真实图像激光汽车平视显示器
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2017-01-02 DOI: 10.1080/15599612.2017.1342884
Chao-Chih Fan, Siyuan He
ABSTRACT This paper reports a micromirror-based real image laser automotive head-up display (HUD), which overcomes the limitations of the previous designs by: (1) implementing an advanced display approach which is able to display sharp corners while the previous designs can only display curved lines such as to improve the display fidelity and (2) Optimizing the optical configuration to significantly reduce the HUD module size. The optical design in the HUD is simulated to choose the off-the-shelf concave lens. The vibration test is conducted to verify that the micromirror can survive 5 g. The prototype of the HUD system is fabricated and tested.
本文报道了一种基于微镜的激光汽车平视显示器(HUD),其通过以下方式克服了先前设计的局限性:(1)实现能够显示锐角的高级显示方法,而先前设计只能显示曲线以提高显示保真度;(2)优化光学配置以显著减小HUD模块尺寸。模拟HUD中的光学设计以选择现成的凹透镜。进行振动测试以验证微镜能够在5 g.制作并测试了HUD系统的原型。
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引用次数: 7
In situ monitoring of photostriction in chalcogenide glass film using fiber Bragg grating sensors 利用光纤光栅传感器原位监测硫系玻璃薄膜的光致伸缩
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2017-01-02 DOI: 10.1080/15599612.2017.1374490
Sivakumar Gayathri, G. S. Varma, Gagandeep Singh, B. N. Shivananju, S. Sridevi, S. Umapathy, S. S. Gorthi, S. Asokan
ABSTRACT The reversible photostriction (photomechanical strain) in Ge35S65 chalcogenide thin film deposited by a solvent casting method has been monitored using a fiber Bragg grating (FBG) sensor. The shift in Bragg wavelength is used as a probing parameter to quantitatively measure the photoinduced strain arising because of structural modifications in these films under illumination. Exposure to band gap light (405 nm) and above band gap light (302 and 254 nm) leads to a reversible photostriction effect of the order of 100 µε. The present study shows that FBG sensors can be used to effectively measure the optomechanical actuation in chalcogenide films caused by the reversible photostriction effect in the visible and ultraviolet wavelength region.
摘要利用光纤布拉格光栅(FBG)传感器对溶剂浇铸法沉积的Ge35S65硫族化合物薄膜的可逆光致伸缩(光机械应变)进行了监测。布拉格波长的偏移被用作探测参数,以定量测量由于这些膜在光照下的结构修饰而产生的光致应变。暴露于带隙光(405 nm)和带隙以上的光(302和254 nm)导致100量级的可逆光致伸缩效应 µε。本研究表明,FBG传感器可用于有效测量在可见光和紫外波长范围内由可逆光致伸缩效应引起的硫族化物薄膜的光机械致动。
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引用次数: 2
Multiview registration-based handheld 3D profiling system using visual navigation and structured light 使用视觉导航和结构光的基于多视图配准的手持式三维轮廓系统
IF 5.5 3区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2017-01-02 DOI: 10.1080/15599612.2017.1300968
Shirazi Muhammad Ayaz, M. Y. Kim
ABSTRACT This article describes the 3D handheld profiling system composed of a stereo camera and an illumination projector to collect high-resolution data for close range of applications. Visual navigation approach is either based on feature matching or on accurate target, and the target-based approach was found to be more accurate if the 3D object has less texture on its surface. Block matching algorithm was used to render the single-view 3D reconstruction. For multiview 3D modeling, coarse registration and final refinement of the point clouds using iterative closest point algorithm were utilized. The proposed approach yields good accuracy for multiview registration as demonstrated in the results of this research.
摘要本文介绍了一种由立体相机和照明投影仪组成的3D手持轮廓系统,用于收集近距离应用的高分辨率数据。视觉导航方法要么基于特征匹配,要么基于精确的目标,如果3D对象的表面纹理较少,则基于目标的方法更准确。采用块匹配算法对单视图三维重建进行渲染。对于多视图三维建模,使用迭代最近点算法对点云进行粗配准和最终细化。如本研究结果所示,所提出的方法为多视点配准提供了良好的精度。
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引用次数: 7
期刊
International Journal of Optomechatronics
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