Abstract
The peculiarities of absorption and emission of the finite layer of cholesteric liquid crystal are investigated. The influence of parameters characterizing the absorption and gain, as well as the layer thickness and the local dielectric anisotropy on the absorption and emission is studied. In particular, it is shown, that the increase of the parameter x′ characterizing the gain results in the increase of emission. However, there are the discrete points in the (λ, x′) plane, where the emission is maximal (λ is the wavelength of incident light). These points determine the critical values of gain at which the low-threshold laser generation takes place. The obtained results can be used to develop the strongly absorbing systems.
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