论文总字数：14267字

摘 要

ABSTRACT ………………………………………………………….. IV

第一章 引言 ……………………………………………………………1

1.1 表面等离极化激元…………………………………………………………1

1.2 增强透射效应………………………………………………………………1

1.3 亚波长FP共振效应……………………………………………………… 2

1.4 增强吸收效应………………………………………………………………3

1.5 问题…………………………………………………………………………4

1. 电解质/电介质界面的SPP效应………………………………7

2.1 电磁波在无限大电解质溶液中的传播……………………………………7

2.2 电介质/电解质界面的SPP效应 …………………………………………8

2.2.1表面波在界面的传播距离……………………………………………9

2.2.2垂直于界面的衰减距离 ……………………………………………11

1. 电解质光栅的增强透射效应…………………………………15

3.1 实验准备 …………………………………………………………………15

3.2 电解质光栅的增强透射效应 ……………………………………………17

3.2.1 有机玻璃容器的微波透射 …………………………………………17

3.2.2 电解质溶液的微波透射 ……………………………………………18

3.2.3 电解质溶液光栅的增强透射Ⅰ ……………………………………20

3.2.4 电解质溶液光栅的增强透射Ⅱ ……………………………………21

3.3 本章小结 …………………………………………………………………23

1. 结论……………………………………………………………24

参考文献 …………………………………………………………………………25

致谢 ……………………………………………………………………27

液态等离激元材料设计及其光学性质

摘 要

表面等离激元材料具有十分有趣的光学性质和巨大的应用价值。目前，表面等离极化激元材料已经被应用于生物、化学、传感、光电子集成器件等多个领域，尤其是在亚波长光学、数据存储、发光技术、显微镜和生物光子学等领域发挥着重要作用。当前，人们往往利用微结构的金属材料、半导体材料在光频和THz波段实现新的效应。而在微波段，金属真实的等离激元效应可忽略不计。设想，对液体掺入带电离子（电解质溶液）并构造特定的微结构，来模仿等离激元材料的光学性质。我们先理论研究了电磁波在无限大电介质/电解质溶液界面的传播特性，计算了表面波在界面的传播距离及法向的衰减特性。结果显示电解质溶液界面确实能够支持类似于金属界面的SPP模。此外，通过设计电解质溶液的人工结构，我们制作了电解质溶液光栅结构。利用网络分析仪测试了该结构的透射谱，实验证实其中存在增强的微波透射效应。这一效应最先在金属微结构中所发现。利用电解质溶液模拟等离激元材料可能具有潜在的应用价值。

关键词： 表面等离极化激元 电解质 增强透射

Design and optical properties of liquid plasmonic materials

Abstract

Surface plasmonic materials are equipped with interesting optical properties and huge application value. At present, surface plasmon-polartions materials have been used in the field of biology、chemistry、sensing、photoelectron integrator and so on. Especially in the field of subwavelength optics、data storage、luminescence technology 、microscope and biophotonics, they play an very important role. Now, metal materials of microstructure and semiconductor materials are often used by people to realize new effects in the band of optical frequency and THz. However, the true plasmonic effects of metal can be ignored in the microband. Assuming that, liquid which is mixed with charged ions(electrolyte solution) and is designed with specific microstructure is used to imitate the optical properties of plasmonic materials.We studied theoretically the characteristics of the electromagnetic wave’s transmission on the infinite electrolyte solution interface,and calculated the transmit distance on the interface and the normal decline characteristic of the surface wave.The result showed electrolyte solution interface did support the SPP model which was similar to mental interface.In addition,we have made electrolyte solution Grating structure by designing the artificial structure of electrolyte solution.We tested its transmittance spectrum with network analyzer,and it went out that enhanced microwave transmittance effect was existed.This effect was found very firstly in the mental micro-structure. Imitating plasmonic materials with electrolyte solution might create application value potentially.

Keywords: surface plasmon-polartions; electrolyte; enhanced transmission

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