太赫茲及紅外吸波超材料研究進展
發(fā)布時間:2019-05-17 00:15
【摘要】:隨著超材料研究的不斷發(fā)展,基于超材料結構設計的一系列太赫茲及紅外吸波體引起了國內外廣泛關注。由于具有高效的吸波性能,太赫茲及紅外吸波超材料在現(xiàn)代隱身技術、節(jié)能、絕熱、生物化學光譜、紅外成像、傳感和安檢等領域具有廣泛的應用前景。通過緊密跟蹤國內外太赫茲及紅外吸波超材料的最新研究進展,討論總結了太赫茲及紅外吸波超材料的吸波機理。由于材料依靠增強電場強度來實現(xiàn)對電磁波的吸收往往比靠材料本身的損耗吸收電磁波有更高的效率,與傳統(tǒng)吸波材料的工作原理不同,超材料在太赫茲及紅外波段主要依靠亞波長單元結構的設計,降低其等離子體頻率,從而實現(xiàn)表面等離激元場增強效應(SPPs);诖,總結歸納了太赫茲及紅外吸波超材料研究中3種有效降低等離子頻率的方法,分別為金屬表面的周期性結構設計、半導體材料的摻雜和新型碳納米材料的引入,更加清晰地闡明了表面等離激元場增強效應實現(xiàn)方式。同時,對太赫茲及紅外吸波超材料今后的發(fā)展給出了自己的認識。
[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.
【作者單位】: 空軍工程大學理學院;
【基金】:國家青年基金:基于人工表面等離激元的寬帶輕質無反射背板吸波材料研究(61501497)
【分類號】:TB34
本文編號: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.
【作者單位】: 空軍工程大學理學院;
【基金】:國家青年基金:基于人工表面等離激元的寬帶輕質無反射背板吸波材料研究(61501497)
【分類號】:TB34
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