Enhanced Thermoplasmonic Oscillations in Metallic Nanostructured Particles for the Realization of Nanofluidic Sensors
Enhanced Thermoplasmonic Oscillations in Metallic Nanostructured Particles for the Realization of Nanofluidic Sensors
复制标题
用于实现纳米流体传感器的金属纳米结构颗粒中增强的热等离子振荡
DOI：
10.1109/tnano.2007.901187
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发表时间：
2007
影响因子：
2.4
通讯作者：
M. Koshiba
中科院分区：
文献类型：
--
作者：
N. Florous;K. Saitoh;M. Koshiba
我们从理论上研究了由热等离子共振介导的某些金属介电纳米颗粒和拓扑缺陷纳米圆柱体中光的强烈可调纳米聚焦。通过使用通用数值算法，基于规范几何形状的精确 3-D 电磁散射，或任意形状粒子的离散偶极近似建模，与所提出的等离子体纳米结构类别的光谱和热光响应相关，我们确定了通过改变环境温度来增强可调谐热等离子体共振的机制。此外，还发现等离子体共振对主体介质的电特性也敏感，因此使得这种新型等离子体纳米粒子能够用作流体（液体/气体）传感器。我们的研究预计将消除开发对温度波动高度敏感和超紧凑尺寸的纳米传感平台的一个重要障碍，从而使所提出的等离子体谐振器成为未来纳米等离子体传感系统的优秀候选者。
We theoretically investigate the intense tunable nanofocusing of light in certain families of metallo-dielectric nanograin particles and topologically defected nanocylinders, mediated by thermoplasmonic resonances. By using versatile numerical algorithms, based on either exact 3-D electromagnetic scattering from canonical geometries, or discrete dipole approximation modeling for particles with arbitrary shapes, associated with the spectral as well as the thermooptical response of the proposed classes of plasmonic nanostructures, we identify the mechanisms responsible for the enhanced tunable thermoplasmonic resonances, by varying the ambient temperature. In addition it is found that the plasmonic resonances are also sensitive to the electric properties of the host medium, thus enabling this novel class of plasmonic nanoparticles to be used as fluidic (liquid/gas) sensors. Our investigation is expected to remove an essential obstacle in the development of nanosensing platforms with high sensitiveness to temperature fluctuations and ultracompact size, thus making the proposed plasmonic resonators excellent candidates for future nanoplasmonic sensing systems.
金属介电光子晶体中热光和结构无序敏感性的理论预测
DOI：
--
发表时间：
2006
期刊：
IEEE Photonics Technology Letters 18・7
影响因子：
--
作者：
N.J.Florous;K.Saitoh;M.Koshiba
通讯作者：
M.Koshiba