胆留相液晶可以通过在向列相液晶中添加手性剂，使得液晶分子的长轴方向沿着

Bile left liquid crystal can be obtained by adding a chiral agent to a nematic liquid crystal, the liquid crystal molecules such that the long axis direction along the screw shaft rotation angle from a difference of sequentially periodic helical structure like, can be regarded as one-dimensional photonic crystal.

The bile-retained phase liquid crystal can be considered a periodic spiral structure by adding a hand agent to the column-phase liquid crystal, so that the long axis direction of the liquid crystal molecule rotates at an angle that differs from the spiral axis in turn, which can be regarded as a one-dimensional photon crystal.

Cholesteric liquid crystal can be regarded as one-dimensional photonic crystal by adding chiral agent to the nematic liquid crystal, which makes the long axis of the liquid crystal rotate at an angle one by one.<br>