中红外波长负折射率液晶材料

摘要

The negative refractive index has been demonstrated theoretically in nematic liquid crystal consisting of randomly dispersive silicon carbide (SiC) core-shell microspheres in 13~13. 2 μm mid-infrared wavelength range. Due to large permittivity of SiC induced by phonon polaritonic resonance,the collections of SiC microspheres produce negative permeability near 13. 1 μm. By adjusting reasonable shell parameters,negative index liquid crystal is formed. Electromagnetic simulations show the mechanism for the negative permittivity and negative permeability.%在包含碳化硅核壳微球的向列相液晶中,理论计算发现在13～13.2μm中红外波段范围出现了负折射率.由于强烈声子激化共振产生大的介电常数,碳化硅微球在13.1μm附近产生负磁导率.通过确定壳层材料的等离子参数,获得了负折射率.电磁模拟解释了负介电常数和负磁导率产生的机理.