Low-threshold and high efficiency lasing upon band-edge excitation in a cholesteric liquid crystal
Abbreviated Journal Title
Appl. Phys. Lett.
SPONTANEOUS-EMISSION; STOP BAND; LASER; GAP; ENHANCEMENT; WAVE; Physics, Applied
A low threshold and high efficiency laser based on dye-doped cholesteric liquid crystals (CLCs) is demonstrated using an input excitation with the same handedness of circular polarization as the helical structure of the sample at the shorter wavelength band edge of the reflection band. The responsible mechanism originates from the dramatic increase of the optical density of state (DOS) at the band edges. The calculated DOS of the CLC system confirms the authors' experimental results.(c) 2007 American Institute of Physics.
Applied Physics Letters
"Low-threshold and high efficiency lasing upon band-edge excitation in a cholesteric liquid crystal" (2007). Faculty Bibliography 2000s. 7412.