Transmissive Refractive Index Sensing Based on Frequency-Sensitive Responses of Two-Dimensional Photonic Crystals
Transmissive Refractive Index Sensing Based on Frequency-Sensitive Responses of Two-Dimensional Photonic Crystals
复制标题
基于二维光子晶体频率敏感响应的透射折射率传感
DOI：
10.1109/jphot.2016.2615283
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发表时间：
2016
影响因子：
2.4
通讯作者：
Jiang Xunya
中科院分区：
文献类型：
--
作者：
Lin Xulin;Fang Haiwen;Wang Lin;Wang Guo Ping;Jiang Xunya
本文提出了一种利用二维光子晶体的频敏响应进行折射率传感的新方案。具体地说，二维光子晶体由以矩形晶格排列的介质棒组成，支持频敏超准直(SC)。通过测量窄谱源的透射率来检测环境RI的微小变化。该RI传感方案利用了SC频率附近的敏感色散特性：反射和光束绕射都会随着环境RI的轻微增加而增强。通过时域有限差分(FDTD)仿真验证了透射式RI监听的工作原理和性能。我们设计的主要优点是所有的基本组件都可以紧凑地集成在一起，这使得它对于许多应用来说是有吸引力的，例如手持设备和分布式传感器网络。
In this paper, we propose a new scheme of refractive index (RI) sensing, which utilizes frequency-sensitive responses of 2-D photonic crystals. Specifically, the 2-D photonics crystals consist of dielectric rods arranged in rectangular lattice and support frequency-sensitive supercollimation (SC). Small changes in ambient RI are sensed by measuring transmission rate of a narrow spectral source. This RI sensing scheme exploits the sensitive dispersion properties around the SC frequency: Both reflection and beam diffraction are enhanced in response to a slight increase of ambient RI. Operation and performance of the transmissive RI sensing are demonstrated by finite-difference time-domain (FDTD) simulations. The major advantage of our design is that all the essential components can be compactly integrated, which makes it attractive for a number of applications, such as hand-held equipment and distributed sensor networks.