Abstract

Most intracavity MgO:LiNbO₃ terahertz polariton lasers generate output in the 1–3 THz range. In this study, we investigate the potential to extend this tuning range toward 6 THz. We predict broader tuning using a modified polariton gain theory that takes account of additional polariton damping at 3.15 THz and the angle-dependent field overlap in the crystal. We achieved continuous tuning between 1.5 and 5.4 THz and characterised the gain in this range—so far the widest THz frequency range achieved from a nonlinear crystal via intracavity SPS.

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Cavity design with single-mirror THz frequency tuning for polariton lasers

Ondrej Kitzler, Ameera Jose, Andrew Lee, David J. Spence, and Helen M. Pask
Opt. Lett. 47(14) 3391-3394 (2022)

Low-temperature terahertz absorption measurements and polariton laser gain modelling for 5 mol% MgO:LiNbO₃

Ameera A. Jose, Ondrej Kitzler, Helen M. Pask, and David J. Spence
Opt. Mater. Express 12(11) 4499-4505 (2022)

Tunable THz polariton laser based on 1342 nm wavelength for enhanced terahertz wave extraction

Andrew J. Lee, David J. Spence, and Helen M. Pask
Opt. Lett. 42(14) 2691-2694 (2017)

Tunable terahertz generation in the picosecond regime from the stimulated polariton scattering in a LiNbO₃ crystal

Aravindan M. Warrier, Ran Li, Jipeng Lin, Andrew J. Lee, Helen M. Pask, and David J. Spence
Opt. Lett. 41(18) 4409-4412 (2016)

Unidirectional ring laser operation and tunable single-frequency emission using differential parametric gain

O. B. Jensen, M. Helmark, A. G. Urskov, and P. Tidemand-Lichtenberg
Opt. Lett. 49(2) 407-410 (2024)