基于近零折射率角度选择结构的可变量程折射率传感的理论研究  

Theoretical Study of Variable Range Refractive Index Sensing Based on Near-Zero Refractive Index Angle Selection Structure

作　　者：武永 WU Yong(School of Aeronautic Engineering,Nanjing Vocational University of Industry Technology,Nanjing,Jiangsu 210023,China)

机构地区：[1]南京工业职业技术大学航空工程学院,江苏南京210023

出　　处：《电子学报》2025年第1期105-111,共7页Acta Electronica Sinica

摘　　要：本文研究了InSb材料的近零折射率特性在实现角度选择窗口方面的潜力.角度选择结构由主结构和抗反射结构组成,其中主结构用于产生角度选择特性,而抗反射结构用于抑制电磁波泄漏.结果表明,对于太赫兹TE波入射,在2.65 THz附近产生显著的角度选择窗口,而对于太赫兹TM波入射,在10.5 THz附近产生角度选择窗口.对于不同的极化形式,控制温度都能够显著地调节角度窗口的角度范围.此外,临界角特性对于背景介质的折射率变化非常敏感,可以通过调控温度实现拓展测量范围的目的.当温度分别为300 K、298 K、296 K时,测量范围分别为1.1~1.3 RIU、1.3~1.5 RIU、1.5~1.7 RIU.相比于恒温测量,折射率量程拓展了200%.所提出的结构采用了新颖的临界角原理用于折射率传感,并且通过温控的方式拓宽了检测范围,为可变量程折射率传感器的发展提供了新的思路.In this paper,the phenomenon of angle selection of InSb materials with near-zero refractive index is studied.The multilayer structure is composed of the main structure and anti-reflection structure.The main structure is used to generate the angle selection phenomenon,while the anti-reflection structure is used to suppress the leakage of electromagnetic wave.The results show that for the THz TE wave,a significant angle selection window is generated near 2.65 THz,while for the THz TM wave,the window is generated near 10.5 THz.For different polarization forms,temperature control can significantly adjust the angle range of the angle window.In addition,the critical angle characteristic is very sensitive to the refractive index change of the background medium,and the measurement range can be extended by temperature control.When the temperature is 300 K,298 K,296 K,respectively,the measurement range is 1.1~1.3 RIU,1.3~1.5 RIU,1.5~1.7 RIU.Compared with the constant temperature measurement,the refractive index measurement range is expanded by 200%.This structure uses a novel critical angle principle for refractive index sensing,and extends the detection range through temperature control,which provides a new idea for the development of optical sensors.

关 键 词：近零折射率 角度选择结构 温控 太赫兹 可变量程 折射率传感器 

分 类 号：TN715[电子电信—电路与系统]