太赫兹及红外吸波超材料研究进展
发布时间：2019-05-17 00:15
【摘要】：随着超材料研究的不断发展,基于超材料结构设计的一系列太赫兹及红外吸波体引起了国内外广泛关注。由于具有高效的吸波性能,太赫兹及红外吸波超材料在现代隐身技术、节能、绝热、生物化学光谱、红外成像、传感和安检等领域具有广泛的应用前景。通过紧密跟踪国内外太赫兹及红外吸波超材料的最新研究进展,讨论总结了太赫兹及红外吸波超材料的吸波机理。由于材料依靠增强电场强度来实现对电磁波的吸收往往比靠材料本身的损耗吸收电磁波有更高的效率,与传统吸波材料的工作原理不同,超材料在太赫兹及红外波段主要依靠亚波长单元结构的设计,降低其等离子体频率,从而实现表面等离激元场增强效应(SPPs)。基于此,总结归纳了太赫兹及红外吸波超材料研究中3种有效降低等离子频率的方法,分别为金属表面的周期性结构设计、半导体材料的掺杂和新型碳纳米材料的引入,更加清晰地阐明了表面等离激元场增强效应实现方式。同时,对太赫兹及红外吸波超材料今后的发展给出了自己的认识。
[Abstract]:With the development of supermaterial research, a series of terahertz and infrared absorbers based on supermaterial structure design have attracted extensive attention at home and abroad. Terahertz and infrared absorbing supermaterials have a wide range of applications in modern stealth technology, energy saving, insulation, biochemical spectroscopy, infrared imaging, sensing and security inspection because of their high efficiency. By closely tracking the latest research progress of terahertz and infrared absorbing supermaterials at home and abroad, the absorbing mechanism of terahertz and infrared absorbing supermaterials is discussed and summarized. Because the material relies on the enhancement of the electric field intensity to realize the absorption of the electromagnetic wave, it is often more efficient than the loss of the material itself to absorb the electromagnetic wave, which is different from the working principle of the traditional absorbing material. The supermaterial in terahertz and infrared band mainly depends on the design of subwavelength unit structure to reduce its plasma frequency, so as to realize the surface isoionized exciton field enhancement effect (SPPs). Based on this, three effective methods to reduce plasma frequency in terahertz and infrared absorbing supermaterials are summarized, which are periodic structure design of metal surface, doping of semiconductor materials and introduction of new carbon nanomaterials. The method of realizing the enhancement effect of the surface isoionized exciton field is clarified more clearly. At the same time, the future development of terahertz and infrared absorbing supermaterials is given.
【作者单位】： 空军工程大学理学院;
【基金】：国家青年基金:基于人工表面等离激元的宽带轻质无反射背板吸波材料研究(61501497)
【分类号】：TB34
本文编号：2478662
[Abstract]:With the development of supermaterial research, a series of terahertz and infrared absorbers based on supermaterial structure design have attracted extensive attention at home and abroad. Terahertz and infrared absorbing supermaterials have a wide range of applications in modern stealth technology, energy saving, insulation, biochemical spectroscopy, infrared imaging, sensing and security inspection because of their high efficiency. By closely tracking the latest research progress of terahertz and infrared absorbing supermaterials at home and abroad, the absorbing mechanism of terahertz and infrared absorbing supermaterials is discussed and summarized. Because the material relies on the enhancement of the electric field intensity to realize the absorption of the electromagnetic wave, it is often more efficient than the loss of the material itself to absorb the electromagnetic wave, which is different from the working principle of the traditional absorbing material. The supermaterial in terahertz and infrared band mainly depends on the design of subwavelength unit structure to reduce its plasma frequency, so as to realize the surface isoionized exciton field enhancement effect (SPPs). Based on this, three effective methods to reduce plasma frequency in terahertz and infrared absorbing supermaterials are summarized, which are periodic structure design of metal surface, doping of semiconductor materials and introduction of new carbon nanomaterials. The method of realizing the enhancement effect of the surface isoionized exciton field is clarified more clearly. At the same time, the future development of terahertz and infrared absorbing supermaterials is given.
【作者单位】： 空军工程大学理学院;
【基金】：国家青年基金:基于人工表面等离激元的宽带轻质无反射背板吸波材料研究(61501497)
【分类号】：TB34
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