Abstract
Temperature-tunable directional laser emission from a dye-doped liquid-crystal-based planar random cavity laser is presented. The optically pumped nematic liquid crystal infiltrated planar random microcavity produces an ultranarrow linewidth (, corresponding to ), highly directional ( divergence angle) laser emission. By increasing the temperature from to , the wavelength of an emitted polarized laser can be tuned between 605.8 and 608.5 (ordinary light) and 631.3 and (extraordinary light). A simulation result from the transfer matrix method that matches the experimental results well is also presented.
© 2007 Optical Society of America
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