# Aravindan M. Warrier, Ran Li, Jipeng Lin, Andrew J. Lee, Helen M. Pask, and David J. Spence

We demonstrate narrowband tunable terahertz generation from a picosecond ${\mathrm{LiNbO}}_{3}$polariton laser, pumped by a CW mode-locked $\mathrm{Nd}\text{:}{\mathrm{YVO}}_{4}$ picosecond laser. We generated up to 5.4 μW of terahertz output in untuned mode. We tuned the terahertz output, using etalons in the cavity, from 0.51 to 2.12 THz. Terahertz output powers of 3.7 μW and 2.4 μW were achieved at terahertz frequencies of 1.6 THz and 0.9 THz, respectively.
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