抄録
Cholesteric liquid crystals (CLC), due to their periodic structure and large birefringence, are 1-D photonic bandgap materials. The bandgap structure of CLC allows the possibility of lasing without external mirrors that usually form a laser cavity. Lasing is strongly enhanced at the long wavelength edge of the photonic bandgap in soluble polymer dye-doped CLC. The lowest threshold observed was at 0.018 μJ pump energy. The wavelength of lasing from the soluble polymer dye-doped CLC system is tuned in the range from 490 to 520nm by changing the temperature from 22.9 to 65.0℃.
