| 초록 |
Periodic modulation of directors of cholesteric liquid crystals(CLCs) arises a photonic band-gap. Near the photonic band edge group velocity of photon approaches zero, and the local density of state of the photon is sharply enhanced. These effects make it possible to get the effective gain and amplification for laser. The CLCs are promising as the tunable organic laser resonator. However liquid state of CLC is vulnerable to pressure, therefore encapsulation is needed to ensure the structural stability. Here, we encapsulate CLCs with triple-emulsion generated by microfluidics to design a capsule-type laser resonator. The CLCs are encapsulated by aqueous inner shell and elastomer shell. The aqueous inner shell helps alignment of helical axes to have radial configuration and elastomer shell provides reconfigurable characteristics. The reconfigurable feature allows control of direction of lasing depending on deformed shape of the capsule. |
