Real-time measurement with a fiber optical surface plasmon resonance sensor for biochemical interaction analysis

基于表面等离子体共振的弧形单芯光子晶体光纤传感器的设计与分析

Design and Analysis of Arc-Shaped Single Core Photonic Crystal Fiber Sensor Based on Surface Plasmon Resonance

本文设计了一种外覆传感材料的弧形单芯PCF-SPR传感器，利用FV-FEM分析金膜及Ta₂O₅涂层的影响，显著提升了灵敏度与分辨率。

等离激元光纤上分级纳米结构的直接成核实现增强的SERS性能

Direct Nucleation of Hierarchical Nanostructures on Plasmonic Fiber Optics Enables Enhanced SERS Performance

该研究结合固态去湿与选择性晶种生长，在光纤端面直接制备形貌可调的分级Au纳米岛，使穿光纤SERS探针对R6G的检测限达到10^-7 M，较原始纳米岛提升一个数量级。

Partial Quantum Coherence, Ultrashort Electron Pulse Statistics, and a Plasmon-Enhanced Nanotip Emitter Based on Metallized Optical Fibers

The present dissertation covers two related research projects. The first topic was initiated with the ultimate goal of observing quantum degeneracy in ultrashort free electron pulses. This constitutes a thorough theoretical analysis of the problem involving partial quantum coherence and spin polarization of the source in light of a path-integral treatment of the phenomenon of matter-wave diffraction-in-time. Subsequently, results of a trailblazing experiment, to be superseded by a Hanbury Brown-Twiss type conclusive test of free fermion antibunching with electrons, is reported. In this experim…

一种超灵敏可见-红外波段基于光纤的等离子体折射率传感器

An Ultra-Sensitive Visible-IR Range Fiber Based Plasmonic Refractive Index Sensor

本文提出一种覆盖0.55–3.50 μm、检测RI 1.33–1.43的超灵敏PCF-SPR传感器，并结合ANN预测折射率，实现极高灵敏度与分辨率。

Ultra high sensitive long period fiber grating based sensor for detection of adulterator in ethanol

An ultra-sensitive sensor based on long-period fiber graings (LPFGs) has been fabricated for the detection of methanol and water content in ethanol. Our sensor is very compact in size, highly accurate and easy to fabricate making it very useful than the conventional surface plasmon resonance (SPR) sensor, which is bulky and expensive. We show that our sensor is capable to achieve an ultra sensitivity of 696.34 pm/ Volume-percent methanol and 655.3 pm/ Volume-percent water in presence of methanol and water in ethanol respectively. Our sensor is capable of detecting minimum 1.5 x 10^-3 Volume-pe…

通过模糊电子束沉积在光学纳米光纤上确定性自下而上制备等离激元纳米结构

Deterministic Bottom-Up Fabrication of Plasmonic Nanostructures on Optical Nanofibers via Blurred Electron Beam Deposition

本研究提出利用模糊电子束诱导沉积（BEBID）在光学纳米光纤上确定性制备铂纳米柱，克服机械脆弱性，实现亚20纳米精度，并展示定向发射能力，适用于量子光子学与传感。

Performance improvement of refractometric sensors through hybrid plasmonic-Fano resonances

In this paper, we present a plasmonic refractometric sensor that works under normal incidence; allowing its integration on a fiber tip. The sensor's material and geometry exploit the large scattering cross-section given by high-contrast of the index of refraction subwavelength dielectric gratings. Our design generates a hybrid plasmonic-Fano resonance due to the interference between the surface plasmon resonance and the grating response. We optimize the sensor with a merit function that combines the quality parameter of the resonance and the field enhancement at the interaction volume where th…

Losses in plasmonics: from mitigating energy dissipation to embracing loss-enabled functionalities

Unlike conventional optics, plasmonics enables unrivalled concentration of optical energy well beyond the diffraction limit of light. However, a significant part of this energy is dissipated as heat. Plasmonic losses present a major hurdle in the development of plasmonic devices and circuits that can compete with other mature technologies. Until recently, they have largely kept the use of plasmonics to a few niche areas where loss is not a key factor, such as surface enhanced Raman scattering and biochemical sensing. Here, we discuss the origin of plasmonic losses and various approaches to eit…

一种在光纤上集成3D打印微光学元件的多维阴极荧光探测器

A Multi-Dimensional Cathodoluminescence Detector with 3D Printed Micro-Optics on a Fiber

本文设计并实现了一种集成3D打印微光学元件的光纤式多维阴极荧光探测器，可在扫描电镜中实现远场成像、光谱和时间相关单光子计数表征。

Advanced Surface Chemistry Analysis of Carbon Nanotube Fibers by X-ray Photoelectron Spectroscopy

Carbon nanotube fibers are materials with an exceptional combination of properties, including higher toughness than carbon fibers, electrical conductivity above metals, large specific surface area (250 $\frac{m^2}{g}$) and high electrochemical stability. As such, they are a key component in various multifunctional structures combining augmented mechanical properties with efficient interfacial energy storage/transfer processes. This work presents a thorough XPS study of CNT fibers subjected to different purification and chemical treatments, including spatially-resolved micro XPS synchrotron mea…

可调纳米岛修饰锥形光纤揭示透光纤SERS检测中的并发贡献

Tunable Nanoislands Decorated Tapered Optical Fibers Reveal Concurrent Contributions in Through-Fiber SERS Detection

本研究采用可调固相去湿法在锥形光纤表面制备单层金纳米岛，系统研究颗粒几何参数对透光纤SERS性能的影响，实现低至10⁻⁷ M的检测限，为远程SERS探针设计提供新策略。

单分子动态在光纤上的高对比干涉成像

High-Contrast Interferometric Imaging of Single-Molecule Dynamics on Optical Fibers

本研究提出一种基于干涉成像的高对比无标记方法，用于单分子动态的高灵敏度检测与追踪，显著提升信噪比并实现单分子尺度的声学传感器微型化。

High quality Al$_{0.37}$In$_{0.63}$N layers grown at low temperature (<300$^\circ$C) by radio-frequency sputtering

High-quality Al0.37In0.63N layers have been grown by reactive radio-frequency (RF) sputtering on sapphire, glass and Si (111) at low substrate temperature (from room temperature to 300°C). Their structural, chemical and optical properties are investigated as a function of the growth temperature and type of substrate. X-ray diffraction measurements reveal that all samples have a wurtzite crystallographic structure oriented with the c-axis perpendicular to the substrate surface, without parasitic orientations. The layers preserve their Al content at 37 % for the whole range of studied growth tem…