基于银/碳纳米颗粒近红外驱动的大调制深度太赫兹调制器  

NIR-driven large modulation depth terahertz modulator based on silver/carbon nanoparticles

作　　者：苟晗光 朱宇 邬宗冬 史光华[2] 赖伟恩 GOU Han-Guang;ZHU Yu;WU Zong-Dong;SHI Guang-Hua;LAI Wei-En(National Engineering Laboratory of Special Display Technology,National Key Laboratory of Advanced Display Technology,Anhui Province Key Laboratory of Measuring Theory and Precision Instrument,Academy of Optoelectronic Technology,School of Instrument Science and Optoelectronics Engineering,Hefei University of Technology,Hefei 230009,China;The 13th Research Institute of China Electronics Technology Group,Shijiazhuang 050051,China)

机构地区：[1]合肥工业大学仪器科学与光电工程学院光电技术研究院特种显示技术国家工程实验室先进显示技术国家重点实验室测量理论与精密仪器安徽省重点实验室,安徽合肥230009 [2]中国电子科技集团第13研究所,河北石家庄050051

出　　处：《红外与毫米波学报》2023年第4期476-482,共7页Journal of Infrared and Millimeter Waves

基　　金：安徽高校协同创新项目(No.GXXT-2022-015);中央高校基本科研业务费(No.PA2021GDSK0098);德国科学研究基金会(German Forschungsgemeinschaft);德国研究基金会(Deutsche Forschungsgemeinschaft)DFG:RA2841/12-1-Grant No./Projektnummer 456700276);中国-德国科学研究中心;中德研究促进中心(CDZ)中德研究促进中心,GZ1580。功能-纳米-材料-科学合作小组"FNMS-COOP"。

摘　　要：近红外光驱动的太赫兹调制器是太赫兹/红外光纤混合通信系统中的重要组成部分。这里提出了一种基于银纳米颗粒/碳量子点(Ag NPs/CDs)近红外驱动的太赫兹调制器。实验结果表明,银纳米颗粒(Ag NPs)与碳量子点(CDs)的结合会引起纳米颗粒的量子尺寸效应和介电限域效应,利用Ag NPs/CDs可以增强硅基底对近红外光的吸收,从而实现近红外驱动的太赫兹波调制。通过808 nm的近红外调制激励源,对样品进行了0.22~0.33 THz范围内的太赫兹透射特性的表征,与参考硅基片相比,Ag NPs/CDs近红外太赫兹调制器的调制深度可以达到83%左右,显著高于参考硅基片的调制深度(~54%),实现了大调制深度的太赫兹波调制。本研究工作在太赫兹/红外光纤混合通信系统中拥有重要的应用价值。Near-infrared light-driven terahertz modulators are an important component in terahertz/infrared fiber-optic hybrid communication systems.Here,a near-infrared driven terahertz modulator based on silver nanoparticles/carbon quantum dots(Ag NPs/CDs)is proposed.Experimental results show that the combination of silver nanoparticles(Ag NPs)and carbon quantum dots(CDs)induces quantum size effect and dielectric confinement effect of nanoparticles,and the absorption of NIR light by silicon substrate can be enhanced by using Ag NPs/CDs to achieve NIR-driven terahertz wave modulation.The terahertz transmission characteristics of the sample were characterized in the range of 0.22-0.33 THz with the 808 nm NIR modulation excitation source,and the modulation depth of the Ag NPs/CDs NIR terahertz modulator could reach about 83%compared with the reference silicon substrate,which was significantly higher than the modulation depth of the reference silicon substrate(~54%),realizing the terahertz wave modulation with large modulation depth.This research work has important applications in terahertz/infrared fiber hybrid communication sys‐tems.

关 键 词：太赫兹 纳米颗粒 太赫兹调制器 近红外光调制 表面等离子体共振 

分 类 号：TN29[电子电信—物理电子学]