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The characteristics of polarized random lasers (RLs), made from dye-doped twisted nematic liquid crystals (DD-TNLCs) in a wedge cell, have been investigated. Regardless of the multiple light scattering within disordered LCs inside the cell, the output polarization is compulsorily determined by the rubbing direction of PI on glass plate. Moreover, the output intensity of the RLs can be manipulated...
The output polarization and slope efficiency of random laser could be controlled by the rubbing direction of PI and temperature, respectively, from dye-doped twisted nematic liquid crystals within wedge cell.
The experimental detail of a random lasing action from dye-doped nematic liquid crystals (LCs) inside single-core capillaries with a core diameter below 50 $\mu\hbox{m} $ was investigated. The resonant characteristics, including the number of emission spikes, the full width at half maximum (FWHM), and the estimated $Q$-factor, were shown to depend on the core diameter of a capillary. In contrast...
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