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. 2022 Nov 15;47(22):5985-5988.
doi: 10.1364/OL.474343.

Custom terahertz waveforms using complementary organic nonlinear optical crystals

Claire Rader, Megan F Nielson, Brittany E Knighton, Zachary B Zaccardi, David J Michaelis, Jeremy A Johnson

Custom terahertz waveforms using complementary organic nonlinear optical crystals

Claire Rader et al. Opt Lett. .

Abstract

Organic nonlinear optical (NLO) crystals are among the most efficient (>1%) terahertz (THz) radiation generators. However, one of the limitations of using organic NLO crystals is that the unique THz absorptions in each crystal make it difficult to obtain a strong, smooth, and broad emission spectrum. In this work, we combine THz pulses from two complementary crystals, DAST and PNPA, to effectively fill in spectral gaps, creating a smooth spectrum with frequencies out to 5 THz. The combination of pulses also increases the peak-to-peak field strength from 1 MV/cm to 1.9 MV/cm.

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