| 초록 |
Cholesteric liquid crystals (CLCs) construct a helical superstructure which exhibits photonic bandgap due to its periodic modulation of refractive index along the helical axis. Micro-compartments of CLCs make use of this photonic property for applications such as sensing, lasing, and optical barcoding. To provide enhanced functionality, the integration of distinct CLCs into a single microgranule can be performed. However, it is challenging to fabricate multishell structure of CLCs without a complicated microfluidics system. Here, we suggest a facile and spontaneous production of CLC multishells through liquid-liquid phase separation (LLPS). The multiplicity of emulsions is controlled from one to five by adjusting the initial composition of the ternary mixture. The chiral dopant is unevenly partitioned in CLC-rich layers in an odd yet expected manner during LLPSs. The resultant single microgranules embrace distinct stopbands in CLC-rich layers enabling dual-band-edge lasing. |
