Laser-ablative engineering of phase singularities in plasmonic metamaterial arrays for biosensing applications
Laser-ablative engineering of phase singularities in plasmonic metamaterial arrays for biosensing applications
复制标题
DOI：
10.1063/1.4865553
复制
发表时间：
2014-02-17
影响因子：
4
通讯作者：
Kabashin, Andrei V.
中科院分区：
文献类型：
--
作者：
Aristov, Andrey I.;Zywietz, Urs;Kabashin, Andrei V.
利用激光诱导转移和纳米光刻相结合的方法，我们设计并制备了大面积的金纳米粒子超材料阵列，由于局域等离子体的强烈衍射耦合，在反射光中表现出极强的类Heaviside相移。当用于传感方案时，这些相位奇点提供了5×10(4)°的灵敏度。每单位折射率变化的相移，可与等离子体生物传感器的最佳值相媲美。基于这种超材料阵列的传感器平台的实现有望极大地提高等离子体生物传感装置的灵敏度和成本效益。(C)2014 AIP出版有限责任公司。
By using methods of laser-induced transfer combined with nanoparticle lithography, we design and fabricate large-area gold nanoparticle-based metamaterial arrays exhibiting extreme Heaviside-like phase jumps in reflected light due to a strong diffractive coupling of localized plasmons. When employed in sensing schemes, these phase singularities provide the sensitivity of 5 x 10(4) deg. of phase shift per refractive index unit change that is comparable with best values reported for plasmonic biosensors. The implementation of sensor platforms on the basis of such metamaterial arrays promises a drastic improvement of sensitivity and cost efficiency of plasmonic biosensing devices. (C) 2014 AIP Publishing LLC.