【摘要】：近20年,太赫茲科學技術發(fā)展迅速,太赫茲波由于其特殊的波段位置和優(yōu)良的性能,已被廣泛應用于工業(yè)生產(chǎn)和科學研究領域,太赫茲波與物質(zhì)之間的相互作用成為研究熱點�；谔掌潟r域光譜技術測量并且提取該波段材料的光學特性,是進一步深入研究太赫茲脈沖與物質(zhì)的相互作用的表征手段,也是目前科研工作者在太赫茲科學與技術研究領域最基本、最普遍、最關鍵的一部分。本文研究了基于太赫茲時域光譜技術的測量原理和應用,提出了一種改進固體平行型樣品材料參數(shù)測量精確度的方法。本文的研究工作主要內(nèi)容和創(chuàng)新點包括:第一部分綜述了太赫茲時域光譜系統(tǒng)、三種提取樣品材料參數(shù)的模式以及近年來國內(nèi)外采用太赫茲光譜技術研究物質(zhì)性質(zhì)的研究現(xiàn)狀。第二部分提出了對Duvillaret和Dorney測量方法的改進方案,從理論上分析了不等光程方法提高材料太赫茲波段折射率和吸收系數(shù)等參數(shù)測量精度的可行性,并進行了實驗驗證,獲得了 0.5-2.5THz頻率范圍的高密度聚乙烯的折射率和吸收系數(shù)。結果顯示兩種方法測量樣品的折射率和吸收系數(shù)有較大的差異,不等光程法能更加精確提取材料參數(shù),并可以揭示常規(guī)方法無法測得的材料特征吸收峰。第三部分利用兩種方法測量了褐煤A、褐煤B、貴州煙煤和木質(zhì)腐殖酸四種煤炭樣品在太赫茲波段的光譜特性。分析了四種煤炭樣品在0.5-1.5THz波段的吸收系數(shù)、折射率和介電常數(shù)等材料參數(shù)。本文的主要創(chuàng)新點是基于透射式太赫茲光譜技術提出一種改進提取材料參數(shù)新穎的方法——不等光程法,該方法將目前常用的常規(guī)法改進,將空置樣品時的空氣參考信號替換為透過不等厚度的樣品的太赫茲信號作為參考信號。對比常規(guī)法和不等光程法的理論推導過程,可以明顯的看到不等光程法提取的材料參數(shù)相比較常規(guī)法精確度更加高,操縱更加簡單方便,該方法有望為提高太赫茲波段材料的特征光譜數(shù)據(jù)庫做出部分貢獻。
[Abstract]:In the last 20 years, terahertz wave has been widely used in industrial production and scientific research because of its special band position and excellent performance. The interaction between terahertz wave and matter has become a research hotspot. Based on terahertz time domain spectroscopy (THz), the optical properties of the materials in this band are measured and extracted, which is a means to further study the interaction between terahertz pulses and matter. It is also the most basic, most common and key part of THz science and technology research. The measurement principle and application based on terahertz time domain spectroscopy (THz) are studied in this paper. A method to improve the accuracy of material parameters measurement for solid parallel samples is proposed. The main contents and innovations of this paper are as follows: in the first part, the terahertz time-domain spectroscopy system, three models for extracting the material parameters of samples, and the research status of terahertz spectroscopy techniques used in the study of material properties at home and abroad in recent years are reviewed. In the second part, an improved method for measuring Duvillaret and Dorney is proposed, and the feasibility of improving the precision of measurement of refractive index and absorption coefficient of THz band by unequal optical path method is analyzed theoretically, and the experimental verification is carried out. The refractive index and absorption coefficient of high density polyethylene (HDPE) with 0.5-2.5THz frequency range were obtained. The results show that there are great differences in refractive index and absorption coefficient between the two methods. The unequal path method can extract the material parameters more accurately and reveal the characteristic absorption peaks which can not be measured by conventional methods. In the third part, the spectral characteristics of lignite A, lignite B, Guizhou bituminous coal and woody humic acid in terahertz band were measured by two methods. The absorption coefficient, refractive index and dielectric constant of four kinds of coal samples in 0.5-1.5THz band were analyzed. The main innovation of this paper is that based on the transmission terahertz spectroscopy, a novel method for extracting material parameters-unequal path method, is proposed. This method improves the conventional method, which is commonly used at present. The air reference signal of the empty sample is replaced with the terahertz signal of the sample with different thickness as the reference signal. Compared with the conventional method and the unequal path method, it can be seen that the material parameters extracted by the unequal path method are more accurate and easy to operate than the conventional method. This method is expected to contribute to the improvement of the characteristic spectral database of terahertz band materials.
【學位授予單位】：山東科技大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：TB30;O441

【參考文獻】

相關期刊論文 前10條

1 馬連剛;肖保華;唐婷;;胡敏酸衰減全反射-傅里葉變換-紅外光譜研究[J];地球與環(huán)境;2014年01期

2 吳四清;劉勁松;汪盛烈;胡兵;;太赫茲波遠程探測的最新研究進展[J];激光與紅外;2013年12期

3 和挺;沈京玲;;太赫茲光譜技術在毒品檢測中的應用研究[J];光譜學與光譜分析;2013年09期

4 許長虹;滕學明;趙卉;金武軍;寶日瑪;趙昆;;煤炭中氫含量與揮發(fā)分的太赫茲時域光譜研究[J];現(xiàn)代科學儀器;2013年04期

5 齊娜;張卓勇;相玉紅;;太赫茲技術在醫(yī)學檢測和診斷中的應用研究[J];光譜學與光譜分析;2013年08期

6 陳濤;李智;莫瑋;胡放榮;;太赫茲時域光譜的藥物多組分同時定量測定[J];光譜學與光譜分析;2013年05期

7 寶日瑪;趙昆;滕學明;李娟;陸歆怡;馬嬌;;地溝油的太赫茲波段光譜特性研究[J];中國油脂;2013年04期

8 李向軍;付秀華;劉建軍;杜勇;洪治;;固體膠原蛋白加熱變性過程中的太赫茲介電譜研究[J];生物物理學報;2013年03期

9 何明霞;陳濤;楊吉龍;劉嘉政;;太赫茲成像技術在腫瘤診斷方面的應用[J];腫瘤;2012年12期

10 趙卉;趙昆;田璐;苗青;尼浩;;運用太赫茲時域光譜技術定量分析柴油的含硫量(英文)[J];紅外與毫米波學報;2012年05期

相關碩士學位論文 前8條

1 李淼;維生素的太赫茲光譜數(shù)據(jù)庫研究[D];南京林業(yè)大學;2015年

2 付秀華;膠原蛋白和牛血清蛋白溫度穩(wěn)定性的太赫茲介電譜研究[D];中國計量學院;2013年

3 宋麗軍;基于復式晶格光子晶體雙波長THz波調(diào)制器的特性研究[D];南京郵電大學;2012年

4 李玨岐;THz返波管的研究[D];電子科技大學;2011年

5 王毅;近紅外光譜分析技術在食用植物油品質(zhì)檢測中的應用[D];江蘇大學;2010年

6 駱斌;偶氮染料中間體及幾種紡織纖維的太赫茲光譜研究[D];浙江理工大學;2010年

7 孫紅起;太赫茲時域光譜系統(tǒng)的性能研究[D];首都師范大學;2007年

8 叢超;芳香族羧酸化合物溶劑效應的紅外光譜研究[D];浙江大學;2007年

，

本文編號：2434517