Lv Jiangtao, Liang Tong, Gu Qiongchan, Liu Qiang, Ying Yu, Si Guangyuan
College of Information Science and Engineering, Northeastern University, Shenyang 110004, China.
Hebei Key Laboratory of Micro-Nano Precision Optical Sensing and Measurement Technology, Qinhuangdao 066004, China.
Nanomaterials (Basel). 2022 Oct 26;12(21):3764. doi: 10.3390/nano12213764.
A new concave shaped high refractive index plasmonic sensor with a micro-channel is proposed in this work, which comprises an analyte channel in the core hole. The sensor is elaborately designed to reduce the interference effect from the metal coating. Furthermore, the impact of the proposed structure on the sensitivity is also investigated by engineering the geometric parameters using the finite element method. We select gold as the plasmonic material in this theoretical study because it is widely used to fabricate plasmonic and metamaterial devices due to its chemical stability and compatibility. According to wavelength interrogation technique, simulations results show that this sensor can obtain maximal wavelength sensitivity of 10,050 nm/refractive index unit. In view of the excellent indicators of this device, it has important development potential in chemical and biological research fields.
本文提出了一种新型的带有微通道的凹形高折射率等离子体传感器，其核心孔内包含一个分析物通道。该传感器经过精心设计，以减少金属涂层的干扰效应。此外，还通过有限元方法对几何参数进行工程设计，研究了所提出结构对灵敏度的影响。在本理论研究中，我们选择金作为等离子体材料，因为由于其化学稳定性和兼容性，它被广泛用于制造等离子体和超材料器件。根据波长询问技术，模拟结果表明该传感器可获得10,050 nm/折射率单位的最大波长灵敏度。鉴于该器件的优异指标，它在化学和生物学研究领域具有重要的发展潜力。
