左手材料的色散和等倾干涉

研究了左手材料棱镜的色散特性和左手材料平行平板的等倾干涉特性。对于左手材料棱镜而言,其色散时出射光偏离原来的传播方向与右手材料棱镜的色散规律恰好相反,且对于同一种单色光而言,当入射角相同时,左手材料棱镜的色散偏向角大于右手材料棱镜的色散偏向角。在研究左手材料平行平板的等倾干涉特性时,推导了反射光和透射光焦平面上的光强分布公式,分析了等倾干涉条纹的级数与亮、暗条纹的关系,讨论了光程差的影响因素及影响规律,推导了存在半波损失情况下的等倾圆环的亮环半径公式和暗环宽度公式。研究发现:对于左手材料平行平板的等倾干涉条纹而言,等倾干涉圆环中心处的干涉级数较小;偏离圆环中心越远,干涉条纹的级数越大。这一规律和右手材料平行平板的等倾干涉条纹规律不同。

Dispersion and Equal-Inclination Interference Characteristics of Left-Handed Materials

The dispersion characteristics of the left-handed material prism and the equal-inclination interference characteristics of parallel plate of the left-handed material are studied.For prism of the left-handed material,the deflecting direction of the exit light deviating from the original propagation direction is contrary to that of prism of the right-handed material.The deviation angle of prism of the left-handed material is larger than that of prism of the right-handed material for the same monochromatic light with equal incident angles.The formulas of intensity distribution of the reflected light and transmitted light at the focal planes are derived for investigating the characteristics of parallel plate the left-handed material.The relation between bright and dark fringes of equal-inclination interference and their orders is analyzed.The formulas of bright rings′ radii and dark rings′ widths in the case of half-wave loss are derived.For the equal-inclination interference characteristics of parallel plate of the left-handed material,the orders of fringes of equal-inclination interference are lower at the center of circular rings,which is different from the case of parallel plate of the right-handed material.