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 (0.03nm, corresponding to Q>20,000), highly directional (1.4° divergence angle) laser emission. By increasing the temperature from 27°C to 34°C, the wavelength of an emitted polarized laser can be tuned between 605.8 and 608.5 (ordinary light) and 631.3 and 624.9nm (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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