Electro-optic steering of random laser emission in liquid crystals

Gaetano Assanto, Sreekanth Perumbilavil, Armando Piccardi, Martti Kauranen

Abstract


Using an external low-frequency electric field applied to dye-doped nematic liquid crystals, we demonstrate that random lasing obtained by optical pumping can be steered in angular direction by routing an all-optical waveguide able to collect the emitted light. By varying the applied voltage from 0 to 2 V, we reduce the walk-off and sweep the random laser guided beam over 7 degrees.

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Photonics Letters of Poland - A Publication of the Photonics Society of Poland
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ISSN: 2080-2242