不同螺旋体浓度旋波介质吸波性能的研究

利用空间测量方法对不同浓度手性旋波介质的吸波性能进行了测量。实验表明，手性螺旋的浓度可以做为调节旋波介质吸波性能的一个灵敏参量。在非手性基体中加入适当浓度的螺旋体可有效提高手性介质的吸波性能。手性螺旋体的基体中的浓度有一最佳浓度匹配点，该浓度点在３．２％和４．０％之间。在设计高吸收宽频段的手征性吸波材料时，应考虑螺旋体在手性介质中的浓度匹配。

Study on Absorbing Properties of Chiral Medium with Different Spring Concentration

By using free-space method,the absorbing properties of chiral materials with different spring concentration are measured. A method to measure chiral parameter is given. The experimental design, the sample preparation, and the measurement technique are discussed. Experimental results indicated that changing spring concentration can be acted as a effective method to adjust the absorbing properties of chiral materials.There is a best matched point of chiral spring concentration between 3.2% to 4.0%,which should be considered when the chiral absorbing materials are designed for wide absorbing band applications.