| 초록 |
Cholesteric liquid crystals (CLCs) exhibit unique optical properties arisen from their helical superstructure. CLCs can be fabricated by doping chiral material in an achiral LC host to induce a twist of LC molecules from one layer to the next. Due to their periodic modulation of the refractive index, CLCs exhibit a photonic bandgap property. CLCs in spherical confinement develop not only the central dot color but also photonic cross-communication. The array of CLC drops exhibits peripheral patterns by the beam path of retro-reflection mediated via neighboring CLC drops. The cross-communication between non-identical contacting CLC drops is successfully observed, demonstrating the mechanism of cross-communication comes from the light pathway and overlapping stopbands. Furthermore, various arrays of distinct CLC drops can show a partial turn-on of cross-communication, making this system promising for application in anticounterfeit. |
