中国光学（中英文）2026，Vol.19Issue(1)：1-9,9.DOI:10.37188/CO.2025-0106
一维光子晶体缺陷腔堆叠的太赫兹吸收谱增强
Enhancement of terahertz absorption spectrum by stacking one-dimensional photonic crystal defect cavities
摘要
Abstract
Terahertz(THz)spectroscopy technology has demonstrated great application value in the field of organic and biological macromolecule detection.However,the traditional sample pressing method cannot be applied in the actual detection of trace analytes,and additional structures are required to enhance the interac-tion between the analytes and THz waves.To solve this problem,we propose a terahertz absorption spec-trum enhancement structure based on stacked one-dimensional photonic crystals(1D-PCs)defect cavities.The structure employs metal parallel-plate waveguides to separate a series of one-dimensional photonic crys-tals(1D-PCs)with defect cavities of varying widths,and coats the sample film on a substrate that penetrates all defect cavities.The incident broadband terahertz wave can simultaneously excite multiple resonant peaks at different frequencies corresponding to the photonic crystal defect modes in different layers.The enhanced terahertz absorption spectrum of the analyte can be obtained by linking the envelope formed by these reson-ant absorption peaks.The simulation results show that a 0.1 μm α-lactose sample can accomplish an absorp-tion enhancement factor of approximately 303 times in the frequency range of 0.49 to 0.57 THz.This meth-od offers fast measurement speed and maintains a relatively low sample amount,providing an effective strategy for the enhancement detection of trace analytes by terahertz absorption spectrum.关键词
太赫兹波/堆叠/缺陷腔/一维光子晶体/增强吸收光谱Key words
terahertz waves/stacking/defect cavity/one-dimensional photonic crystal/enhanced absorption spectrum分类
信息技术与安全科学引用本文复制引用
徐泽堃,李向军,严德贤..一维光子晶体缺陷腔堆叠的太赫兹吸收谱增强[J].中国光学（中英文）,2026,19(1):1-9,9.基金项目
浙江省公益技术研究工业项目(No.LTGN23C180003)Supported by Basic Public Welfare Research Project of Zhejiang Province(No.LTGN23C180003) （No.LTGN23C180003）
