用于提高传感器灵敏度的银纳米颗粒集成太赫兹超表面

Silver nanoparticles-integrated terahertz metasurface for enhancing sensor sensitivity.

作者信息

Mu Tonglin, Ye Yunxia, Dai Zijie, Zhao Rui, Yang Maosheng, Ren Xudong

出版信息

Opt Express. 2022 Nov 7;30(23):41101-41109. doi: 10.1364/OE.472520.

Abstract

A silver nanoparticles (AgNPs)-integrated terahertz (THz) metasurface sensor was presented and applied to enhance the sensitivity of substance detection. Simulations and experiments were conducted to study the influence of AgNPs on the sensor performance. The enhancement of the local electric field excited by AgNPs can substantially strengthen the interaction between the THz waves and analytes, thereby increasing detection sensitivity. The experimental results indicate that the detection limit of the AgNPs-integrated metasurface sensor is improved by two orders of magnitude compared to that of the bare metasurface sensor without AgNPs. This study provides a convenient method to enhance the sensitivity of THz metasurface sensors.

摘要

提出了一种集成银纳米颗粒（AgNPs）的太赫兹（THz）超表面传感器，并将其应用于提高物质检测的灵敏度。进行了模拟和实验以研究AgNPs对传感器性能的影响。AgNPs激发的局部电场增强可显著加强太赫兹波与分析物之间的相互作用，从而提高检测灵敏度。实验结果表明，与没有AgNPs的裸超表面传感器相比，集成AgNPs的超表面传感器的检测限提高了两个数量级。本研究提供了一种提高太赫兹超表面传感器灵敏度的简便方法。