Plusiotis resplendens

In the beetle Chrysina gloriosa, left-handed green colour reflection is observed from the exoskeleton, but without colour variation, and patterns are structurally and optically analogous to the focal conic domains formed spontaneously on the free surface of a cholesteric liquid crystal. More sophisticated helicoidal structures can be found in Plusiotis resplendens. The latter species is capable of reflecting both left and right circularly polarised light. In contrast to Pallia condensate, the right-handed circular... 

Fig. 7.9. Optical properties of the external integument of the wings of the beetle Plusiotis resplendens (a half-wave plate Xfl separates the two cholesteric pseudo-moiphoses and...

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