In this article, the effects of rotation angle between upper and lower n-fold rotational symmetric nano-structures are studied. Various modes circular dichroism (single wavelength band, dual-wavelength bands, more than two bands) in band from 3.3 to 5 ?m realized. Circular up 0.798 observed. Meanwhile, sensitivity reconfigure strategy for opposite responses has been discussed. Based on Born-Kuh...

In this paper, first we introduce the notions of k-nilpotent (solvable) ideals and BCK-algebras. Specially, show that every commutative ideal is 1-nilpotent (solvable). Second, state an equivalent condition to k-nilpotency (solvablity) BCK-algebra. Finally, study n-fold 2-nilpotent BCK-algebras as a generalization BCK-algebras, relation between these two concepts. Basically, compare solvable (B...